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.. _EIGRP:
*****
EIGRP
*****
EIGRP -- Routing Information Protocol is widely deployed interior gateway
routing protocol. EIGRP was developed in the 1990's. EIGRP is a
@dfn{distance-vector} protocol and is based on the @dfn{dual} algorithms.
As a distance-vector protocol, the EIGRP router send updates to its
neighbors as networks change, thus allowing the convergence to a
known topology.
*eigrpd* supports EIGRP as described in RFC7868
.. _Starting_and_Stopping_eigrpd:
Starting and Stopping eigrpd
============================
The default configuration file name of *eigrpd*'s is
:file:`eigrpd.conf`. When invocation *eigrpd* searches directory
@value{INSTALL_PREFIX_ETC}. If :file:`eigrpd.conf` is not there next
search current directory. If an integrated config is specified
configuration is written into frr.conf
The EIGRP protocol requires interface information
maintained by *zebra* daemon. So running *zebra*
is mandatory to run *eigrpd*. Thus minimum sequence for running
EIGRP is like below:
::
@group
# zebra -d
# eigrpd -d
@end group
Please note that *zebra* must be invoked before *eigrpd*.
To stop *eigrpd*. Please use @command{kill `cat
/var/run/eigrpd.pid`}. Certain signals have special meanings to *eigrpd*.
*SIGHUP*
*SIGUSR1*
Rotate *eigrpd* Rotate the logfile.
*SIGINT*
*SIGTERM*
*eigrpd* sweeps all installed EIGRP routes then terminates properly.
*eigrpd* invocation options. Common options that can be specified
(:ref:`Common_Invocation_Options`).
*-r*
*--retain*
When the program terminates, retain routes added by *eigrpd*.
.. _EIGRP_Configuration:
EIGRP Configuration
===================
.. index:: Command {router eigrp (1-65535)} {}
Command {router eigrp (1-65535)} {}
The `router eigrp` command is necessary to enable EIGRP. To disable
EIGRP, use the `no router eigrp (1-65535)` command. EIGRP must be enabled before carrying out any of the EIGRP commands.
.. index:: Command {no router eigrp (1-65535)} {}
Command {no router eigrp (1-65535)} {}
Disable EIGRP.
.. index:: {EIGRP Command} {network `network`} {}
{EIGRP Command} {network `network`} {}
.. index:: {EIGRP Command} {no network `network`} {}
{EIGRP Command} {no network `network`} {}
Set the EIGRP enable interface by `network`. The interfaces which
have addresses matching with `network` are enabled.
This group of commands either enables or disables EIGRP interfaces between
certain numbers of a specified network address. For example, if the
network for 10.0.0.0/24 is EIGRP enabled, this would result in all the
addresses from 10.0.0.0 to 10.0.0.255 being enabled for EIGRP. The `no network` command will disable EIGRP for the specified network.
Below is very simple EIGRP configuration. Interface `eth0` and
interface which address match to `10.0.0.0/8` are EIGRP enabled.
::
@group
!
router eigrp 1
network 10.0.0.0/8
!
@end group
Passive interface
.. index:: {EIGRP command} {passive-interface (`IFNAME`|default)} {}
{EIGRP command} {passive-interface (`IFNAME`|default)} {}
.. index:: {EIGRP command} {no passive-interface `IFNAME`} {}
{EIGRP command} {no passive-interface `IFNAME`} {}
This command sets the specified interface to passive mode. On passive mode
interface, all receiving packets are ignored and eigrpd does
not send either multicast or unicast EIGRP packets except to EIGRP neighbors
specified with `neighbor` command. The interface may be specified
as `default` to make eigrpd default to passive on all interfaces.
The default is to be passive on all interfaces.
.. _How_to_Announce_EIGRP_route:
How to Announce EIGRP route
===========================
.. index:: {EIGRP command} {redistribute kernel} {}
{EIGRP command} {redistribute kernel} {}
.. index:: {EIGRP command} {redistribute kernel metric (1-4294967295) (0-4294967295) (0-255) (1-255) (1-65535)} {}
{EIGRP command} {redistribute kernel metric (1-4294967295) (0-4294967295) (0-255) (1-255) (1-65535)} {}
.. index:: {EIGRP command} {no redistribute kernel} {}
{EIGRP command} {no redistribute kernel} {}
`redistribute kernel` redistributes routing information from
kernel route entries into the EIGRP tables. `no redistribute kernel`
disables the routes.
.. index:: {EIGRP command} {redistribute static} {}
{EIGRP command} {redistribute static} {}
.. index:: {EIGRP command} {redistribute static metric (1-4294967295) (0-4294967295) (0-255) (1-255) (1-65535)} {}
{EIGRP command} {redistribute static metric (1-4294967295) (0-4294967295) (0-255) (1-255) (1-65535)} {}
.. index:: {EIGRP command} {no redistribute static} {}
{EIGRP command} {no redistribute static} {}
`redistribute static` redistributes routing information from
static route entries into the EIGRP tables. `no redistribute static`
disables the routes.
.. index:: {EIGRP command} {redistribute connected} {}
{EIGRP command} {redistribute connected} {}
.. index:: {EIGRP command} {redistribute connected metric (1-4294967295) (0-4294967295) (0-255) (1-255) (1-65535)} {}
{EIGRP command} {redistribute connected metric (1-4294967295) (0-4294967295) (0-255) (1-255) (1-65535)} {}
.. index:: {EIGRP command} {no redistribute connected} {}
{EIGRP command} {no redistribute connected} {}
Redistribute connected routes into the EIGRP tables. `no redistribute connected` disables the connected routes in the EIGRP tables.
This command redistribute connected of the interface which EIGRP disabled.
The connected route on EIGRP enabled interface is announced by default.
.. index:: {EIGRP command} {redistribute ospf} {}
{EIGRP command} {redistribute ospf} {}
.. index:: {EIGRP command} {redistribute ospf metric (1-4294967295) (0-4294967295) (0-255) (1-255) (1-65535)} {}
{EIGRP command} {redistribute ospf metric (1-4294967295) (0-4294967295) (0-255) (1-255) (1-65535)} {}
.. index:: {EIGRP command} {no redistribute ospf} {}
{EIGRP command} {no redistribute ospf} {}
`redistribute ospf` redistributes routing information from
ospf route entries into the EIGRP tables. `no redistribute ospf`
disables the routes.
.. index:: {EIGRP command} {redistribute bgp} {}
{EIGRP command} {redistribute bgp} {}
.. index:: {EIGRP command} {redistribute bgp metric (1-4294967295) (0-4294967295) (0-255) (1-255) (1-65535)} {}
{EIGRP command} {redistribute bgp metric (1-4294967295) (0-4294967295) (0-255) (1-255) (1-65535)} {}
.. index:: {EIGRP command} {no redistribute bgp} {}
{EIGRP command} {no redistribute bgp} {}
`redistribute bgp` redistributes routing information from
bgp route entries into the EIGRP tables. `no redistribute bgp`
disables the routes.
.. _Show_EIGRP_Information:
Show EIGRP Information
======================
To display EIGRP routes.
.. index:: Command {show ip eigrp topology} {}
Command {show ip eigrp topology} {}
Show EIGRP routes.
The command displays all EIGRP routes.
.. index:: Command {show ip eigrp topology} {}
Command {show ip eigrp topology} {}
The command displays current EIGRP status
::
@group
eigrpd> **show ip eigrp topology**
# show ip eigrp topo
EIGRP Topology Table for AS(4)/ID(0.0.0.0)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply
r - reply Status, s - sia Status
P 10.0.2.0/24, 1 successors, FD is 256256, serno: 0
via Connected, enp0s3
@end group
EIGRP Debug Commands
====================
Debug for EIGRP protocol.
.. index:: Command {debug eigrp packets} {}
Command {debug eigrp packets} {}
Debug eigrp packets
`debug eigrp` will show EIGRP packets that are sent and recevied.
.. index:: Command {debug eigrp transmit} {}
Command {debug eigrp transmit} {}
Debug eigrp transmit events
`debug eigrp transmit` will display detailed information about the EIGRP transmit events.
.. index:: Command {show debugging eigrp} {}
Command {show debugging eigrp} {}
Display *eigrpd*'s debugging option.
`show debugging eigrp` will show all information currently set for eigrpd
debug.
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