.. _ospfv2: ****** OSPFv2 ****** :abbr:`OSPF (Open Shortest Path First)` version 2 is a routing protocol which is described in :rfc:`2328`. OSPF is an :abbr:`IGP (Interior Gateway Protocol)`. Compared with :abbr:`RIP`, :abbr:`OSPF` can provide scalable network support and faster convergence times. OSPF is widely used in large networks such as :abbr:`ISP (Internet Service Provider)` backbone and enterprise networks. .. include:: ospf_fundamentals.rst .. _configuring-ospfd: Configuring OSPF ================ *ospfd* accepts all :ref:`common-invocation-options`. .. option:: -n, --instance Specify the instance number for this invocation of *ospfd*. .. option:: -a, --apiserver Enable the OSPF API server. This is required to use ``ospfclient``. *ospfd* must acquire interface information from *zebra* in order to function. Therefore *zebra* must be running before invoking *ospfd*. Also, if *zebra* is restarted then *ospfd* must be too. Like other daemons, *ospfd* configuration is done in :abbr:`OSPF` specific configuration file :file:`ospfd.conf` when the integrated config is not used. .. _ospf-multi-instance: Multi-instance Support ---------------------- OSPF supports multiple instances. Each instance is identified by a positive nonzero integer that must be provided when adding configuration items specific to that instance. Enabling instances is done with :file:`/etc/frr/daemons` in the following manner: :: ... ospfd=yes ospfd_instances=1,5,6 ... The ``ospfd_instances`` variable controls which instances are started and what their IDs are. In this example, after starting FRR you should see the following processes: .. code-block:: shell # ps -ef | grep "ospfd" frr 11816 1 0 17:30 ? 00:00:00 /usr/lib/frr/ospfd --daemon -A 127.0.0.1 -n 1 frr 11822 1 0 17:30 ? 00:00:00 /usr/lib/frr/ospfd --daemon -A 127.0.0.1 -n 2 frr 11828 1 0 17:30 ? 00:00:00 /usr/lib/frr/ospfd --daemon -A 127.0.0.1 -n 3 The instance number should be specified in the config when addressing a particular instance: .. code-block:: frr router ospf 5 ospf router-id 1.2.3.4 area 0.0.0.0 authentication message-digest ... .. _ospf-router: Routers ------- To start OSPF process you have to specify the OSPF router. .. index:: router ospf [(1-65535)] vrf NAME .. clicmd:: router ospf [(1-65535)] vrf NAME .. index:: no router ospf [(1-65535)] vrf NAME .. clicmd:: no router ospf [(1-65535)] vrf NAME Enable or disable the OSPF process. .. index:: ospf router-id A.B.C.D .. clicmd:: ospf router-id A.B.C.D .. index:: no ospf router-id [A.B.C.D] .. clicmd:: no ospf router-id [A.B.C.D] This sets the router-ID of the OSPF process. The router-ID may be an IP address of the router, but need not be - it can be any arbitrary 32bit number. However it MUST be unique within the entire OSPF domain to the OSPF speaker - bad things will happen if multiple OSPF speakers are configured with the same router-ID! If one is not specified then *ospfd* will obtain a router-ID automatically from *zebra*. .. index:: ospf abr-type TYPE .. clicmd:: ospf abr-type TYPE .. index:: no ospf abr-type TYPE .. clicmd:: no ospf abr-type TYPE `type` can be cisco|ibm|shortcut|standard. The "Cisco" and "IBM" types are equivalent. The OSPF standard for ABR behaviour does not allow an ABR to consider routes through non-backbone areas when its links to the backbone are down, even when there are other ABRs in attached non-backbone areas which still can reach the backbone - this restriction exists primarily to ensure routing-loops are avoided. With the "Cisco" or "IBM" ABR type, the default in this release of FRR, this restriction is lifted, allowing an ABR to consider summaries learned from other ABRs through non-backbone areas, and hence route via non-backbone areas as a last resort when, and only when, backbone links are down. Note that areas with fully-adjacent virtual-links are considered to be "transit capable" and can always be used to route backbone traffic, and hence are unaffected by this setting (:clicmd:`area A.B.C.D virtual-link A.B.C.D`). More information regarding the behaviour controlled by this command can be found in :rfc:`3509`, and :t:`draft-ietf-ospf-shortcut-abr-02.txt`. Quote: "Though the definition of the :abbr:`ABR (Area Border Router)` in the OSPF specification does not require a router with multiple attached areas to have a backbone connection, it is actually necessary to provide successful routing to the inter-area and external destinations. If this requirement is not met, all traffic destined for the areas not connected to such an ABR or out of the OSPF domain, is dropped. This document describes alternative ABR behaviors implemented in Cisco and IBM routers." .. index:: ospf rfc1583compatibility .. clicmd:: ospf rfc1583compatibility .. index:: no ospf rfc1583compatibility .. clicmd:: no ospf rfc1583compatibility :rfc:`2328`, the successor to :rfc:`1583`, suggests according to section G.2 (changes) in section 16.4 a change to the path preference algorithm that prevents possible routing loops that were possible in the old version of OSPFv2. More specifically it demands that inter-area paths and intra-area backbone path are now of equal preference but still both preferred to external paths. This command should NOT be set normally. .. index:: log-adjacency-changes [detail] .. clicmd:: log-adjacency-changes [detail] .. index:: no log-adjacency-changes [detail] .. clicmd:: no log-adjacency-changes [detail] Configures ospfd to log changes in adjacency. With the optional detail argument, all changes in adjacency status are shown. Without detail, only changes to full or regressions are shown. .. index:: passive-interface INTERFACE .. clicmd:: passive-interface INTERFACE .. index:: no passive-interface INTERFACE .. clicmd:: no passive-interface INTERFACE Do not speak OSPF interface on the given interface, but do advertise the interface as a stub link in the router-:abbr:`LSA (Link State Advertisement)` for this router. This allows one to advertise addresses on such connected interfaces without having to originate AS-External/Type-5 LSAs (which have global flooding scope) - as would occur if connected addresses were redistributed into OSPF (:ref:`redistribute-routes-to-ospf`). This is the only way to advertise non-OSPF links into stub areas. .. index:: timers throttle spf DELAY INITIAL-HOLDTIME MAX-HOLDTIME .. clicmd:: timers throttle spf DELAY INITIAL-HOLDTIME MAX-HOLDTIME .. index:: no timers throttle spf .. clicmd:: no timers throttle spf This command sets the initial `delay`, the `initial-holdtime` and the `maximum-holdtime` between when SPF is calculated and the event which triggered the calculation. The times are specified in milliseconds and must be in the range of 0 to 600000 milliseconds. The `delay` specifies the minimum amount of time to delay SPF calculation (hence it affects how long SPF calculation is delayed after an event which occurs outside of the holdtime of any previous SPF calculation, and also serves as a minimum holdtime). Consecutive SPF calculations will always be separated by at least 'hold-time' milliseconds. The hold-time is adaptive and initially is set to the `initial-holdtime` configured with the above command. Events which occur within the holdtime of the previous SPF calculation will cause the holdtime to be increased by `initial-holdtime`, bounded by the `maximum-holdtime` configured with this command. If the adaptive hold-time elapses without any SPF-triggering event occurring then the current holdtime is reset to the `initial-holdtime`. The current holdtime can be viewed with :clicmd:`show ip ospf`, where it is expressed as a multiplier of the `initial-holdtime`. .. code-block:: frr router ospf timers throttle spf 200 400 10000 In this example, the `delay` is set to 200ms, the initial holdtime is set to 400ms and the `maximum holdtime` to 10s. Hence there will always be at least 200ms between an event which requires SPF calculation and the actual SPF calculation. Further consecutive SPF calculations will always be separated by between 400ms to 10s, the hold-time increasing by 400ms each time an SPF-triggering event occurs within the hold-time of the previous SPF calculation. This command supersedes the *timers spf* command in previous FRR releases. .. index:: max-metric router-lsa [on-startup|on-shutdown] (5-86400) .. clicmd:: max-metric router-lsa [on-startup|on-shutdown] (5-86400) .. index:: max-metric router-lsa administrative .. clicmd:: max-metric router-lsa administrative .. index:: no max-metric router-lsa [on-startup|on-shutdown|administrative] .. clicmd:: no max-metric router-lsa [on-startup|on-shutdown|administrative] This enables :rfc:`3137` support, where the OSPF process describes its transit links in its router-LSA as having infinite distance so that other routers will avoid calculating transit paths through the router while still being able to reach networks through the router. This support may be enabled administratively (and indefinitely) or conditionally. Conditional enabling of max-metric router-lsas can be for a period of seconds after startup and/or for a period of seconds prior to shutdown. Enabling this for a period after startup allows OSPF to converge fully first without affecting any existing routes used by other routers, while still allowing any connected stub links and/or redistributed routes to be reachable. Enabling this for a period of time in advance of shutdown allows the router to gracefully excuse itself from the OSPF domain. Enabling this feature administratively allows for administrative intervention for whatever reason, for an indefinite period of time. Note that if the configuration is written to file, this administrative form of the stub-router command will also be written to file. If *ospfd* is restarted later, the command will then take effect until manually deconfigured. Configured state of this feature as well as current status, such as the number of second remaining till on-startup or on-shutdown ends, can be viewed with the :clicmd:`show ip ospf` command. .. index:: auto-cost reference-bandwidth (1-4294967) .. clicmd:: auto-cost reference-bandwidth (1-4294967) .. index:: no auto-cost reference-bandwidth .. clicmd:: no auto-cost reference-bandwidth This sets the reference bandwidth for cost calculations, where this bandwidth is considered equivalent to an OSPF cost of 1, specified in Mbits/s. The default is 100Mbit/s (i.e. a link of bandwidth 100Mbit/s or higher will have a cost of 1. Cost of lower bandwidth links will be scaled with reference to this cost). This configuration setting MUST be consistent across all routers within the OSPF domain. .. index:: network A.B.C.D/M area A.B.C.D .. clicmd:: network A.B.C.D/M area A.B.C.D .. index:: network A.B.C.D/M area (0-4294967295) .. clicmd:: network A.B.C.D/M area (0-4294967295) .. index:: no network A.B.C.D/M area A.B.C.D .. clicmd:: no network A.B.C.D/M area A.B.C.D .. index:: no network A.B.C.D/M area (0-4294967295) .. clicmd:: no network A.B.C.D/M area (0-4294967295) This command specifies the OSPF enabled interface(s). If the interface has an address from range 192.168.1.0/24 then the command below enables ospf on this interface so router can provide network information to the other ospf routers via this interface. .. code-block:: frr router ospf network 192.168.1.0/24 area 0.0.0.0 Prefix length in interface must be equal or bigger (i.e. smaller network) than prefix length in network statement. For example statement above doesn't enable ospf on interface with address 192.168.1.1/23, but it does on interface with address 192.168.1.129/25. Note that the behavior when there is a peer address defined on an interface changed after release 0.99.7. Currently, if a peer prefix has been configured, then we test whether the prefix in the network command contains the destination prefix. Otherwise, we test whether the network command prefix contains the local address prefix of the interface. In some cases it may be more convenient to enable OSPF on a per interface/subnet basis (:clicmd:`ip ospf area AREA [ADDR]`). .. _ospf-area: Areas ----- .. index:: area A.B.C.D range A.B.C.D/M .. clicmd:: area A.B.C.D range A.B.C.D/M .. index:: area (0-4294967295) range A.B.C.D/M .. clicmd:: area (0-4294967295) range A.B.C.D/M .. index:: no area A.B.C.D range A.B.C.D/M .. clicmd:: no area A.B.C.D range A.B.C.D/M .. index:: no area (0-4294967295) range A.B.C.D/M .. clicmd:: no area (0-4294967295) range A.B.C.D/M Summarize intra area paths from specified area into one Type-3 summary-LSA announced to other areas. This command can be used only in ABR and ONLY router-LSAs (Type-1) and network-LSAs (Type-2) (i.e. LSAs with scope area) can be summarized. Type-5 AS-external-LSAs can't be summarized - their scope is AS. Summarizing Type-7 AS-external-LSAs isn't supported yet by FRR. .. code-block:: frr router ospf network 192.168.1.0/24 area 0.0.0.0 network 10.0.0.0/8 area 0.0.0.10 area 0.0.0.10 range 10.0.0.0/8 With configuration above one Type-3 Summary-LSA with routing info 10.0.0.0/8 is announced into backbone area if area 0.0.0.10 contains at least one intra-area network (i.e. described with router or network LSA) from this range. .. index:: area A.B.C.D range IPV4_PREFIX not-advertise .. clicmd:: area A.B.C.D range IPV4_PREFIX not-advertise .. index:: no area A.B.C.D range IPV4_PREFIX not-advertise .. clicmd:: no area A.B.C.D range IPV4_PREFIX not-advertise Instead of summarizing intra area paths filter them - i.e. intra area paths from this range are not advertised into other areas. This command makes sense in ABR only. .. index:: area A.B.C.D range IPV4_PREFIX substitute IPV4_PREFIX .. clicmd:: area A.B.C.D range IPV4_PREFIX substitute IPV4_PREFIX .. index:: no area A.B.C.D range IPV4_PREFIX substitute IPV4_PREFIX .. clicmd:: no area A.B.C.D range IPV4_PREFIX substitute IPV4_PREFIX Substitute summarized prefix with another prefix. .. code-block:: frr router ospf network 192.168.1.0/24 area 0.0.0.0 network 10.0.0.0/8 area 0.0.0.10 area 0.0.0.10 range 10.0.0.0/8 substitute 11.0.0.0/8 One Type-3 summary-LSA with routing info 11.0.0.0/8 is announced into backbone area if area 0.0.0.10 contains at least one intra-area network (i.e. described with router-LSA or network-LSA) from range 10.0.0.0/8. This command makes sense in ABR only. .. index:: area A.B.C.D virtual-link A.B.C.D .. clicmd:: area A.B.C.D virtual-link A.B.C.D .. index:: area (0-4294967295) virtual-link A.B.C.D .. clicmd:: area (0-4294967295) virtual-link A.B.C.D .. index:: no area A.B.C.D virtual-link A.B.C.D .. clicmd:: no area A.B.C.D virtual-link A.B.C.D .. index:: no area (0-4294967295) virtual-link A.B.C.D .. clicmd:: no area (0-4294967295) virtual-link A.B.C.D .. index:: area A.B.C.D shortcut .. clicmd:: area A.B.C.D shortcut .. index:: area (0-4294967295) shortcut .. clicmd:: area (0-4294967295) shortcut .. index:: no area A.B.C.D shortcut .. clicmd:: no area A.B.C.D shortcut .. index:: no area (0-4294967295) shortcut .. clicmd:: no area (0-4294967295) shortcut Configure the area as Shortcut capable. See :rfc:`3509`. This requires that the 'abr-type' be set to 'shortcut'. .. index:: area A.B.C.D stub .. clicmd:: area A.B.C.D stub .. index:: area (0-4294967295) stub .. clicmd:: area (0-4294967295) stub .. index:: no area A.B.C.D stub .. clicmd:: no area A.B.C.D stub .. index:: no area (0-4294967295) stub .. clicmd:: no area (0-4294967295) stub Configure the area to be a stub area. That is, an area where no router originates routes external to OSPF and hence an area where all external routes are via the ABR(s). Hence, ABRs for such an area do not need to pass AS-External LSAs (type-5s) or ASBR-Summary LSAs (type-4) into the area. They need only pass Network-Summary (type-3) LSAs into such an area, along with a default-route summary. .. index:: area A.B.C.D stub no-summary .. clicmd:: area A.B.C.D stub no-summary .. index:: area (0-4294967295) stub no-summary .. clicmd:: area (0-4294967295) stub no-summary .. index:: no area A.B.C.D stub no-summary .. clicmd:: no area A.B.C.D stub no-summary .. index:: no area (0-4294967295) stub no-summary .. clicmd:: no area (0-4294967295) stub no-summary Prevents an *ospfd* ABR from injecting inter-area summaries into the specified stub area. .. index:: area A.B.C.D default-cost (0-16777215) .. clicmd:: area A.B.C.D default-cost (0-16777215) .. index:: no area A.B.C.D default-cost (0-16777215) .. clicmd:: no area A.B.C.D default-cost (0-16777215) Set the cost of default-summary LSAs announced to stubby areas. .. index:: area A.B.C.D export-list NAME .. clicmd:: area A.B.C.D export-list NAME .. index:: area (0-4294967295) export-list NAME .. clicmd:: area (0-4294967295) export-list NAME .. index:: no area A.B.C.D export-list NAME .. clicmd:: no area A.B.C.D export-list NAME .. index:: no area (0-4294967295) export-list NAME .. clicmd:: no area (0-4294967295) export-list NAME Filter Type-3 summary-LSAs announced to other areas originated from intra- area paths from specified area. .. code-block:: frr router ospf network 192.168.1.0/24 area 0.0.0.0 network 10.0.0.0/8 area 0.0.0.10 area 0.0.0.10 export-list foo ! access-list foo permit 10.10.0.0/16 access-list foo deny any With example above any intra-area paths from area 0.0.0.10 and from range 10.10.0.0/16 (for example 10.10.1.0/24 and 10.10.2.128/30) are announced into other areas as Type-3 summary-LSA's, but any others (for example 10.11.0.0/16 or 10.128.30.16/30) aren't. This command is only relevant if the router is an ABR for the specified area. .. index:: area A.B.C.D import-list NAME .. clicmd:: area A.B.C.D import-list NAME .. index:: area (0-4294967295) import-list NAME .. clicmd:: area (0-4294967295) import-list NAME .. index:: no area A.B.C.D import-list NAME .. clicmd:: no area A.B.C.D import-list NAME .. index:: no area (0-4294967295) import-list NAME .. clicmd:: no area (0-4294967295) import-list NAME Same as export-list, but it applies to paths announced into specified area as Type-3 summary-LSAs. .. index:: area A.B.C.D filter-list prefix NAME in .. clicmd:: area A.B.C.D filter-list prefix NAME in .. index:: area A.B.C.D filter-list prefix NAME out .. clicmd:: area A.B.C.D filter-list prefix NAME out .. index:: area (0-4294967295) filter-list prefix NAME in .. clicmd:: area (0-4294967295) filter-list prefix NAME in .. index:: area (0-4294967295) filter-list prefix NAME out .. clicmd:: area (0-4294967295) filter-list prefix NAME out .. index:: no area A.B.C.D filter-list prefix NAME in .. clicmd:: no area A.B.C.D filter-list prefix NAME in .. index:: no area A.B.C.D filter-list prefix NAME out .. clicmd:: no area A.B.C.D filter-list prefix NAME out .. index:: no area (0-4294967295) filter-list prefix NAME in .. clicmd:: no area (0-4294967295) filter-list prefix NAME in .. index:: no area (0-4294967295) filter-list prefix NAME out .. clicmd:: no area (0-4294967295) filter-list prefix NAME out Filtering Type-3 summary-LSAs to/from area using prefix lists. This command makes sense in ABR only. .. index:: area A.B.C.D authentication .. clicmd:: area A.B.C.D authentication .. index:: area (0-4294967295) authentication .. clicmd:: area (0-4294967295) authentication .. index:: no area A.B.C.D authentication .. clicmd:: no area A.B.C.D authentication .. index:: no area (0-4294967295) authentication .. clicmd:: no area (0-4294967295) authentication Specify that simple password authentication should be used for the given area. .. index:: area A.B.C.D authentication message-digest .. clicmd:: area A.B.C.D authentication message-digest .. index:: area (0-4294967295) authentication message-digest .. clicmd:: area (0-4294967295) authentication message-digest Specify that OSPF packets must be authenticated with MD5 HMACs within the given area. Keying material must also be configured on a per-interface basis (:clicmd:`ip ospf message-digest-key`). MD5 authentication may also be configured on a per-interface basis (:clicmd:`ip ospf authentication message-digest`). Such per-interface settings will override any per-area authentication setting. .. _ospf-interface: Interfaces ---------- .. index:: ip ospf area AREA [ADDR] .. clicmd:: ip ospf area AREA [ADDR] .. index:: no ip ospf area [ADDR] .. clicmd:: no ip ospf area [ADDR] Enable OSPF on the interface, optionally restricted to just the IP address given by `ADDR`, putting it in the `AREA` area. Per interface area settings take precedence to network commands (:clicmd:`network A.B.C.D/M area A.B.C.D`). If you have a lot of interfaces, and/or a lot of subnets, then enabling OSPF via this command may result in a slight performance improvement. .. index:: ip ospf authentication-key AUTH_KEY .. clicmd:: ip ospf authentication-key AUTH_KEY .. index:: no ip ospf authentication-key .. clicmd:: no ip ospf authentication-key Set OSPF authentication key to a simple password. After setting `AUTH_KEY`, all OSPF packets are authenticated. `AUTH_KEY` has length up to 8 chars. Simple text password authentication is insecure and deprecated in favour of MD5 HMAC authentication. .. index:: ip ospf authentication message-digest .. clicmd:: ip ospf authentication message-digest Specify that MD5 HMAC authentication must be used on this interface. MD5 keying material must also be configured. Overrides any authentication enabled on a per-area basis (:clicmd:`area A.B.C.D authentication message-digest`) Note that OSPF MD5 authentication requires that time never go backwards (correct time is NOT important, only that it never goes backwards), even across resets, if ospfd is to be able to promptly reestablish adjacencies with its neighbours after restarts/reboots. The host should have system time be set at boot from an external or non-volatile source (e.g. battery backed clock, NTP, etc.) or else the system clock should be periodically saved to non-volatile storage and restored at boot if MD5 authentication is to be expected to work reliably. .. index:: ip ospf message-digest-key KEYID md5 KEY .. clicmd:: ip ospf message-digest-key KEYID md5 KEY .. index:: no ip ospf message-digest-key .. clicmd:: no ip ospf message-digest-key Set OSPF authentication key to a cryptographic password. The cryptographic algorithm is MD5. KEYID identifies secret key used to create the message digest. This ID is part of the protocol and must be consistent across routers on a link. KEY is the actual message digest key, of up to 16 chars (larger strings will be truncated), and is associated with the given KEYID. .. index:: ip ospf cost (1-65535) .. clicmd:: ip ospf cost (1-65535) .. index:: no ip ospf cost .. clicmd:: no ip ospf cost Set link cost for the specified interface. The cost value is set to router-LSA's metric field and used for SPF calculation. .. index:: ip ospf dead-interval (1-65535) .. clicmd:: ip ospf dead-interval (1-65535) .. index:: ip ospf dead-interval minimal hello-multiplier (2-20) .. clicmd:: ip ospf dead-interval minimal hello-multiplier (2-20) .. index:: no ip ospf dead-interval .. clicmd:: no ip ospf dead-interval Set number of seconds for RouterDeadInterval timer value used for Wait Timer and Inactivity Timer. This value must be the same for all routers attached to a common network. The default value is 40 seconds. If 'minimal' is specified instead, then the dead-interval is set to 1 second and one must specify a hello-multiplier. The hello-multiplier specifies how many Hellos to send per second, from 2 (every 500ms) to 20 (every 50ms). Thus one can have 1s convergence time for OSPF. If this form is specified, then the hello-interval advertised in Hello packets is set to 0 and the hello-interval on received Hello packets is not checked, thus the hello-multiplier need NOT be the same across multiple routers on a common link. .. index:: ip ospf hello-interval (1-65535) .. clicmd:: ip ospf hello-interval (1-65535) .. index:: no ip ospf hello-interval .. clicmd:: no ip ospf hello-interval Set number of seconds for HelloInterval timer value. Setting this value, Hello packet will be sent every timer value seconds on the specified interface. This value must be the same for all routers attached to a common network. The default value is 10 seconds. This command has no effect if :clicmd:`ip ospf dead-interval minimal hello-multiplier (2-20)` is also specified for the interface. .. index:: ip ospf network (broadcast|non-broadcast|point-to-multipoint|point-to-point) .. clicmd:: ip ospf network (broadcast|non-broadcast|point-to-multipoint|point-to-point) .. index:: no ip ospf network .. clicmd:: no ip ospf network Set explicitly network type for specified interface. .. index:: ip ospf priority (0-255) .. clicmd:: ip ospf priority (0-255) .. index:: no ip ospf priority .. clicmd:: no ip ospf priority Set RouterPriority integer value. The router with the highest priority will be more eligible to become Designated Router. Setting the value to 0, makes the router ineligible to become Designated Router. The default value is 1. .. index:: ip ospf retransmit-interval (1-65535) .. clicmd:: ip ospf retransmit-interval (1-65535) .. index:: no ip ospf retransmit interval .. clicmd:: no ip ospf retransmit interval Set number of seconds for RxmtInterval timer value. This value is used when retransmitting Database Description and Link State Request packets. The default value is 5 seconds. .. index:: ip ospf transmit-delay .. clicmd:: ip ospf transmit-delay .. index:: no ip ospf transmit-delay .. clicmd:: no ip ospf transmit-delay Set number of seconds for InfTransDelay value. LSAs' age should be incremented by this value when transmitting. The default value is 1 second. .. index:: ip ospf area (A.B.C.D|(0-4294967295)) .. clicmd:: ip ospf area (A.B.C.D|(0-4294967295)) .. index:: no ip ospf area .. clicmd:: no ip ospf area Enable ospf on an interface and set associated area. .. _redistribute-routes-to-ospf: Redistribution -------------- .. index:: redistribute (kernel|connected|static|rip|bgp) .. clicmd:: redistribute (kernel|connected|static|rip|bgp) .. index:: redistribute (kernel|connected|static|rip|bgp) ROUTE-MAP .. clicmd:: redistribute (kernel|connected|static|rip|bgp) ROUTE-MAP .. index:: redistribute (kernel|connected|static|rip|bgp) metric-type (1|2) .. clicmd:: redistribute (kernel|connected|static|rip|bgp) metric-type (1|2) .. index:: redistribute (kernel|connected|static|rip|bgp) metric-type (1|2) route-map WORD .. clicmd:: redistribute (kernel|connected|static|rip|bgp) metric-type (1|2) route-map WORD .. index:: redistribute (kernel|connected|static|rip|bgp) metric (0-16777214) .. clicmd:: redistribute (kernel|connected|static|rip|bgp) metric (0-16777214) .. index:: redistribute (kernel|connected|static|rip|bgp) metric (0-16777214) route-map WORD .. clicmd:: redistribute (kernel|connected|static|rip|bgp) metric (0-16777214) route-map WORD .. index:: redistribute (kernel|connected|static|rip|bgp) metric-type (1|2) metric (0-16777214) .. clicmd:: redistribute (kernel|connected|static|rip|bgp) metric-type (1|2) metric (0-16777214) .. index:: redistribute (kernel|connected|static|rip|bgp) metric-type (1|2) metric (0-16777214) route-map WORD .. clicmd:: redistribute (kernel|connected|static|rip|bgp) metric-type (1|2) metric (0-16777214) route-map WORD .. index:: no redistribute (kernel|connected|static|rip|bgp) .. clicmd:: no redistribute (kernel|connected|static|rip|bgp) .. _ospf-redistribute: Redistribute routes of the specified protocol or kind into OSPF, with the metric type and metric set if specified, filtering the routes using the given route-map if specified. Redistributed routes may also be filtered with distribute-lists, see :ref:`ospf distribute-list configuration `. Redistributed routes are distributed as into OSPF as Type-5 External LSAs into links to areas that accept external routes, Type-7 External LSAs for NSSA areas and are not redistributed at all into Stub areas, where external routes are not permitted. Note that for connected routes, one may instead use the `passive-interface` configuration. .. seealso:: clicmd:`passive-interface INTERFACE`. .. index:: default-information originate .. clicmd:: default-information originate .. index:: default-information originate metric (0-16777214) .. clicmd:: default-information originate metric (0-16777214) .. index:: default-information originate metric (0-16777214) metric-type (1|2) .. clicmd:: default-information originate metric (0-16777214) metric-type (1|2) .. index:: default-information originate metric (0-16777214) metric-type (1|2) route-map WORD .. clicmd:: default-information originate metric (0-16777214) metric-type (1|2) route-map WORD .. index:: default-information originate always .. clicmd:: default-information originate always .. index:: default-information originate always metric (0-16777214) .. clicmd:: default-information originate always metric (0-16777214) .. index:: default-information originate always metric (0-16777214) metric-type (1|2) .. clicmd:: default-information originate always metric (0-16777214) metric-type (1|2) .. index:: default-information originate always metric (0-16777214) metric-type (1|2) route-map WORD .. clicmd:: default-information originate always metric (0-16777214) metric-type (1|2) route-map WORD .. index:: no default-information originate .. clicmd:: no default-information originate Originate an AS-External (type-5) LSA describing a default route into all external-routing capable areas, of the specified metric and metric type. If the 'always' keyword is given then the default is always advertised, even when there is no default present in the routing table. .. index:: distribute-list NAME out (kernel|connected|static|rip|ospf .. clicmd:: distribute-list NAME out (kernel|connected|static|rip|ospf .. index:: no distribute-list NAME out (kernel|connected|static|rip|ospf .. clicmd:: no distribute-list NAME out (kernel|connected|static|rip|ospf .. _ospf-distribute-list: Apply the access-list filter, NAME, to redistributed routes of the given type before allowing the routes to redistributed into OSPF (:ref:`ospf redistribution `). .. index:: default-metric (0-16777214) .. clicmd:: default-metric (0-16777214) .. index:: no default-metric .. clicmd:: no default-metric .. index:: distance (1-255) .. clicmd:: distance (1-255) .. index:: no distance (1-255) .. clicmd:: no distance (1-255) .. index:: distance ospf (intra-area|inter-area|external) (1-255) .. clicmd:: distance ospf (intra-area|inter-area|external) (1-255) .. index:: no distance ospf .. clicmd:: no distance ospf .. index:: router zebra .. clicmd:: router zebra .. index:: no router zebra .. clicmd:: no router zebra .. _showing-ospf-information: Showing Information =================== .. _show-ip-ospf: .. index:: show ip ospf .. clicmd:: show ip ospf Show information on a variety of general OSPF and area state and configuration information. .. index:: show ip ospf interface [INTERFACE] .. clicmd:: show ip ospf interface [INTERFACE] Show state and configuration of OSPF the specified interface, or all interfaces if no interface is given. .. index:: show ip ospf neighbor .. clicmd:: show ip ospf neighbor .. index:: show ip ospf neighbor INTERFACE .. clicmd:: show ip ospf neighbor INTERFACE .. index:: show ip ospf neighbor detail .. clicmd:: show ip ospf neighbor detail .. index:: show ip ospf neighbor INTERFACE detail .. clicmd:: show ip ospf neighbor INTERFACE detail .. index:: show ip ospf database .. clicmd:: show ip ospf database .. index:: show ip ospf database (asbr-summary|external|network|router|summary) .. clicmd:: show ip ospf database (asbr-summary|external|network|router|summary) .. index:: show ip ospf database (asbr-summary|external|network|router|summary) LINK-STATE-ID .. clicmd:: show ip ospf database (asbr-summary|external|network|router|summary) LINK-STATE-ID .. index:: show ip ospf database (asbr-summary|external|network|router|summary) LINK-STATE-ID adv-router ADV-ROUTER .. clicmd:: show ip ospf database (asbr-summary|external|network|router|summary) LINK-STATE-ID adv-router ADV-ROUTER .. index:: show ip ospf database (asbr-summary|external|network|router|summary) adv-router ADV-ROUTER .. clicmd:: show ip ospf database (asbr-summary|external|network|router|summary) adv-router ADV-ROUTER .. index:: show ip ospf database (asbr-summary|external|network|router|summary) LINK-STATE-ID self-originate .. clicmd:: show ip ospf database (asbr-summary|external|network|router|summary) LINK-STATE-ID self-originate .. index:: show ip ospf database (asbr-summary|external|network|router|summary) self-originate .. clicmd:: show ip ospf database (asbr-summary|external|network|router|summary) self-originate .. index:: show ip ospf database max-age .. clicmd:: show ip ospf database max-age .. index:: show ip ospf database self-originate .. clicmd:: show ip ospf database self-originate .. index:: show ip ospf route .. clicmd:: show ip ospf route Show the OSPF routing table, as determined by the most recent SPF calculation. .. _opaque-lsa: Opaque LSA ========== .. index:: ospf opaque-lsa .. clicmd:: ospf opaque-lsa .. index:: capability opaque .. clicmd:: capability opaque .. index:: no ospf opaque-lsa .. clicmd:: no ospf opaque-lsa .. index:: no capability opaque .. clicmd:: no capability opaque *ospfd* supports Opaque LSA (:rfc:`2370`) as partial support for MPLS Traffic Engineering LSAs. The opaque-lsa capability must be enabled in the configuration. An alternate command could be "mpls-te on" (:ref:`ospf-traffic-engineering`). Note that FRR offers only partial support for some of the routing protocol extensions that are used with MPLS-TE; it does not support a complete RSVP-TE solution. .. index:: show ip ospf database (opaque-link|opaque-area|opaque-external) .. clicmd:: show ip ospf database (opaque-link|opaque-area|opaque-external) .. index:: show ip ospf database (opaque-link|opaque-area|opaque-external) LINK-STATE-ID .. clicmd:: show ip ospf database (opaque-link|opaque-area|opaque-external) LINK-STATE-ID .. index:: show ip ospf database (opaque-link|opaque-area|opaque-external) LINK-STATE-ID adv-router ADV-ROUTER .. clicmd:: show ip ospf database (opaque-link|opaque-area|opaque-external) LINK-STATE-ID adv-router ADV-ROUTER .. index:: show ip ospf database (opaque-link|opaque-area|opaque-external) adv-router ADV-ROUTER .. clicmd:: show ip ospf database (opaque-link|opaque-area|opaque-external) adv-router ADV-ROUTER .. index:: show ip ospf database (opaque-link|opaque-area|opaque-external) LINK-STATE-ID self-originate .. clicmd:: show ip ospf database (opaque-link|opaque-area|opaque-external) LINK-STATE-ID self-originate .. index:: show ip ospf database (opaque-link|opaque-area|opaque-external) self-originate .. clicmd:: show ip ospf database (opaque-link|opaque-area|opaque-external) self-originate Show Opaque LSA from the database. .. _ospf-traffic-engineering: Traffic Engineering =================== .. note:: At this time, FRR offers partial support for some of the routing protocol extensions that can be used with MPLS-TE. FRR does not support a complete RSVP-TE solution currently. .. index:: mpls-te on .. clicmd:: mpls-te on .. index:: no mpls-te .. clicmd:: no mpls-te Enable Traffic Engineering LSA flooding. .. index:: mpls-te router-address .. clicmd:: mpls-te router-address Configure stable IP address for MPLS-TE. This IP address is then advertise in Opaque LSA Type-10 TLV=1 (TE) option 1 (Router-Address). .. index:: mpls-te inter-as area |as .. clicmd:: mpls-te inter-as area |as .. index:: no mpls-te inter-as .. clicmd:: no mpls-te inter-as Enable :rfc:`5392` support - Inter-AS TE v2 - to flood Traffic Engineering parameters of Inter-AS link. 2 modes are supported: AREA and AS; LSA are flood in AREA with Opaque Type-10, respectively in AS with Opaque Type-11. In all case, Opaque-LSA TLV=6. .. index:: show ip ospf mpls-te interface .. clicmd:: show ip ospf mpls-te interface .. index:: show ip ospf mpls-te interface INTERFACE .. clicmd:: show ip ospf mpls-te interface INTERFACE Show MPLS Traffic Engineering parameters for all or specified interface. .. index:: show ip ospf mpls-te router .. clicmd:: show ip ospf mpls-te router Show Traffic Engineering router parameters. .. _router-information: Router Information ================== .. index:: router-info [as | area] .. clicmd:: router-info [as | area] .. index:: no router-info .. clicmd:: no router-info Enable Router Information (:rfc:`4970`) LSA advertisement with AS scope (default) or Area scope flooding when area is specified. Old syntax `router-info area ` is always supported but mark as deprecated as the area ID is no more necessary. Indeed, router information support multi-area and detect automatically the areas. .. index:: pce address .. clicmd:: pce address .. index:: no pce address .. clicmd:: no pce address .. index:: pce domain as (0-65535) .. clicmd:: pce domain as (0-65535) .. index:: no pce domain as (0-65535) .. clicmd:: no pce domain as (0-65535) .. index:: pce neighbor as (0-65535) .. clicmd:: pce neighbor as (0-65535) .. index:: no pce neighbor as (0-65535) .. clicmd:: no pce neighbor as (0-65535) .. index:: pce flag BITPATTERN .. clicmd:: pce flag BITPATTERN .. index:: no pce flag .. clicmd:: no pce flag .. index:: pce scope BITPATTERN .. clicmd:: pce scope BITPATTERN .. index:: no pce scope .. clicmd:: no pce scope The commands are conform to :rfc:`5088` and allow OSPF router announce Path Computation Element (PCE) capabilities through the Router Information (RI) LSA. Router Information must be enable prior to this. The command set/unset respectively the PCE IP address, Autonomous System (AS) numbers of controlled domains, neighbor ASs, flag and scope. For flag and scope, please refer to :rfc`5088` for the BITPATTERN recognition. Multiple 'pce neighbor' command could be specified in order to specify all PCE neighbours. .. index:: show ip ospf router-info .. clicmd:: show ip ospf router-info Show Router Capabilities flag. .. index:: show ip ospf router-info pce .. clicmd:: show ip ospf router-info pce Show Router Capabilities PCE parameters. .. _debugging-ospf: Segment Routing =============== This is an EXPERIMENTAL support of Segment Routing as per draft `draft-ietf-ospf-segment-routing-extensions-24.txt` for MPLS dataplane. .. index:: [no] segment-routing on .. clicmd:: [no] segment-routing on Enable Segment Routing. Even if this also activate routing information support, it is preferable to also activate routing information, and set accordingly the Area or AS flooding. .. index:: [no] segment-routing global-block (0-1048575) (0-1048575) .. clicmd:: [no] segment-routing global-block (0-1048575) (0-1048575) Fix the Segment Routing Global Block i.e. the label range used by MPLS to store label in the MPLS FIB. .. index:: [no] segment-routing node-msd (1-16) .. clicmd:: [no] segment-routing node-msd (1-16) Fix the Maximum Stack Depth supported by the router. The value depend of the MPLS dataplane. E.g. for Linux kernel, since version 4.13 it is 32. .. index:: [no] segment-routing prefix A.B.C.D/M index (0-65535) [no-php-flag] .. clicmd:: [no] segment-routing prefix A.B.C.D/M index (0-65535) [no-php-flag] Set the Segment Routing index for the specified prefix. Note that, only prefix with /32 corresponding to a loopback interface are currently supported. The 'no-php-flag' means NO Penultimate Hop Popping that allows SR node to request to its neighbor to not pop the label. .. index:: show ip ospf database segment-routing [json] .. clicmd:: show ip ospf database segment-routing [json] Show Segment Routing Data Base, all SR nodes, specific advertised router or self router. Optional JSON output can be obtained by appending 'json' to the end of the command. Debugging OSPF ============== .. index:: debug ospf packet (hello|dd|ls-request|ls-update|ls-ack|all) (send|recv) [detail] .. clicmd:: debug ospf packet (hello|dd|ls-request|ls-update|ls-ack|all) (send|recv) [detail] .. index:: no debug ospf packet (hello|dd|ls-request|ls-update|ls-ack|all) (send|recv) [detail] .. clicmd:: no debug ospf packet (hello|dd|ls-request|ls-update|ls-ack|all) (send|recv) [detail] Dump Packet for debugging .. index:: debug ospf ism .. clicmd:: debug ospf ism .. index:: debug ospf ism (status|events|timers) .. clicmd:: debug ospf ism (status|events|timers) .. index:: no debug ospf ism .. clicmd:: no debug ospf ism .. index:: no debug ospf ism (status|events|timers) .. clicmd:: no debug ospf ism (status|events|timers) Show debug information of Interface State Machine .. index:: debug ospf nsm .. clicmd:: debug ospf nsm .. index:: debug ospf nsm (status|events|timers) .. clicmd:: debug ospf nsm (status|events|timers) .. index:: no debug ospf nsm .. clicmd:: no debug ospf nsm .. index:: no debug ospf nsm (status|events|timers) .. clicmd:: no debug ospf nsm (status|events|timers) Show debug information of Network State Machine .. index:: debug ospf event .. clicmd:: debug ospf event .. index:: no debug ospf event .. clicmd:: no debug ospf event Show debug information of OSPF event .. index:: debug ospf nssa .. clicmd:: debug ospf nssa .. index:: no debug ospf nssa .. clicmd:: no debug ospf nssa Show debug information about Not So Stub Area .. index:: debug ospf lsa .. clicmd:: debug ospf lsa .. index:: debug ospf lsa (generate|flooding|refresh) .. clicmd:: debug ospf lsa (generate|flooding|refresh) .. index:: no debug ospf lsa .. clicmd:: no debug ospf lsa .. index:: no debug ospf lsa (generate|flooding|refresh) .. clicmd:: no debug ospf lsa (generate|flooding|refresh) Show debug detail of Link State messages .. index:: debug ospf te .. clicmd:: debug ospf te .. index:: no debug ospf te .. clicmd:: no debug ospf te Show debug information about Traffic Engineering LSA .. index:: debug ospf zebra .. clicmd:: debug ospf zebra .. index:: debug ospf zebra (interface|redistribute) .. clicmd:: debug ospf zebra (interface|redistribute) .. index:: no debug ospf zebra .. clicmd:: no debug ospf zebra .. index:: no debug ospf zebra (interface|redistribute) .. clicmd:: no debug ospf zebra (interface|redistribute) Show debug information of ZEBRA API .. index:: show debugging ospf .. clicmd:: show debugging ospf OSPF Configuration Examples =========================== A simple example, with MD5 authentication enabled: .. code-block:: frr ! interface bge0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 ABCDEFGHIJK ! router ospf network 192.168.0.0/16 area 0.0.0.1 area 0.0.0.1 authentication message-digest An :abbr:`ABR` router, with MD5 authentication and performing summarisation of networks between the areas: .. code-block:: frr ! password ABCDEF log file /var/log/frr/ospfd.log service advanced-vty ! interface eth0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 ABCDEFGHIJK ! interface ppp0 ! interface br0 ip ospf authentication message-digest ip ospf message-digest-key 2 md5 XYZ12345 ! router ospf ospf router-id 192.168.0.1 redistribute connected passive interface ppp0 network 192.168.0.0/24 area 0.0.0.0 network 10.0.0.0/16 area 0.0.0.0 network 192.168.1.0/24 area 0.0.0.1 area 0.0.0.0 authentication message-digest area 0.0.0.0 range 10.0.0.0/16 area 0.0.0.0 range 192.168.0.0/24 area 0.0.0.1 authentication message-digest area 0.0.0.1 range 10.2.0.0/16 ! A Traffic Engineering configuration, with Inter-ASv2 support. First, the :file:`zebra.conf` part: .. code-block:: frr interface eth0 ip address 198.168.1.1/24 link-params enable admin-grp 0xa1 metric 100 max-bw 1.25e+07 max-rsv-bw 1.25e+06 unrsv-bw 0 1.25e+06 unrsv-bw 1 1.25e+06 unrsv-bw 2 1.25e+06 unrsv-bw 3 1.25e+06 unrsv-bw 4 1.25e+06 unrsv-bw 5 1.25e+06 unrsv-bw 6 1.25e+06 unrsv-bw 7 1.25e+06 ! interface eth1 ip address 192.168.2.1/24 link-params enable metric 10 max-bw 1.25e+07 max-rsv-bw 1.25e+06 unrsv-bw 0 1.25e+06 unrsv-bw 1 1.25e+06 unrsv-bw 2 1.25e+06 unrsv-bw 3 1.25e+06 unrsv-bw 4 1.25e+06 unrsv-bw 5 1.25e+06 unrsv-bw 6 1.25e+06 unrsv-bw 7 1.25e+06 neighbor 192.168.2.2 as 65000 hostname HOSTNAME password PASSWORD log file /var/log/zebra.log ! interface eth0 ip address 198.168.1.1/24 link-params enable admin-grp 0xa1 metric 100 max-bw 1.25e+07 max-rsv-bw 1.25e+06 unrsv-bw 0 1.25e+06 unrsv-bw 1 1.25e+06 unrsv-bw 2 1.25e+06 unrsv-bw 3 1.25e+06 unrsv-bw 4 1.25e+06 unrsv-bw 5 1.25e+06 unrsv-bw 6 1.25e+06 unrsv-bw 7 1.25e+06 ! interface eth1 ip address 192.168.2.1/24 link-params enable metric 10 max-bw 1.25e+07 max-rsv-bw 1.25e+06 unrsv-bw 0 1.25e+06 unrsv-bw 1 1.25e+06 unrsv-bw 2 1.25e+06 unrsv-bw 3 1.25e+06 unrsv-bw 4 1.25e+06 unrsv-bw 5 1.25e+06 unrsv-bw 6 1.25e+06 unrsv-bw 7 1.25e+06 neighbor 192.168.2.2 as 65000 Then the :file:`ospfd.conf` itself: .. code-block:: frr hostname HOSTNAME password PASSWORD log file /var/log/ospfd.log ! ! interface eth0 ip ospf hello-interval 60 ip ospf dead-interval 240 ! interface eth1 ip ospf hello-interval 60 ip ospf dead-interval 240 ! ! router ospf ospf router-id 192.168.1.1 network 192.168.0.0/16 area 1 ospf opaque-lsa mpls-te mpls-te router-address 192.168.1.1 mpls-te inter-as area 1 ! line vty A router information example with PCE advertisement: .. code-block:: frr ! router ospf ospf router-id 192.168.1.1 network 192.168.0.0/16 area 1 capability opaque mpls-te mpls-te router-address 192.168.1.1 router-info area 0.0.0.1 pce address 192.168.1.1 pce flag 0x80 pce domain as 65400 pce neighbor as 65500 pce neighbor as 65200 pce scope 0x80 !