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| author | Reuben Dowle <reuben.dowle@4rf.com> | 2021-02-25 22:10:48 +0100 |
|---|---|---|
| committer | Reuben Dowle <reuben.dowle@4rf.com> | 2021-04-05 23:22:59 +0200 |
| commit | 3c4f65c59c52b3bfe88ef4d4b1bb421246afafa3 (patch) | |
| tree | 2a698ec0c0159fddb5ecc5cfe3a6de1d8c260af0 /doc | |
| parent | ospfd: Support use of ospf with DMVPN (diff) | |
| download | frr-3c4f65c59c52b3bfe88ef4d4b1bb421246afafa3.tar.xz frr-3c4f65c59c52b3bfe88ef4d4b1bb421246afafa3.zip | |
nhrpd: Document multicast functionality
Signed-off-by: Reuben Dowle <reuben.dowle@4rf.com>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/user/nhrpd.rst | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/doc/user/nhrpd.rst b/doc/user/nhrpd.rst index b02e761ac..c7c4975ae 100644 --- a/doc/user/nhrpd.rst +++ b/doc/user/nhrpd.rst @@ -180,6 +180,34 @@ https://git-old.alpinelinux.org/user/tteras/strongswan/ Actively maintained patches are also available at: https://gitlab.alpinelinux.org/alpine/aports/-/tree/master/main/strongswan +.. _multicast-functionality: + +Multicast Functionality +======================= + +nhrpd can be configured to forward multicast packets, allowing routing +protocols that use multicast (such as OSPF) to be supported in the DMVPN +network. + +This support requires an NFLOG redirection rule to work: + + .. code-block:: shell + + iptables -I OUTPUT -d 224.0.0.0/24 -o gre1 -j NFLOG --nflog-group 2 + +.. index:: nhrp multicast-nflog-group (1-65535) +.. clicmd:: nhrp multicast-nflog-group (1-65535) + + Sets the nflog group that nhrpd will listen on for multicast packets. This + value must match the nflog-group value set in the iptables rule. + +.. index:: ip nhrp map multicast A.B.C.D|X:X::X:X A.B.C.D|dynamic +.. clicmd:: ip nhrp map multicast A.B.C.D|X:X::X:X A.B.C.D|dynamic + + Sends multicast packets to the specified NBMA address. If dynamic is + specified then destination NBMA address (or addresses) are learnt + dynamically. + .. _nhrp-events: NHRP Events |