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| author | Nathan Bahr <nbahr@atcorp.com> | 2024-10-30 21:33:09 +0000 |
|---|---|---|
| committer | Nathan Bahr <nbahr@atcorp.com> | 2025-01-09 21:58:22 +0000 |
| commit | f75ec46dfb1f925824e9f6a8ca3a254485dd88f0 (patch) | |
| tree | a95bee2869c0d079bc33209cdca7846fcb3a533d | |
| parent | 590c937e8a1ddca9d2a11580a289dd406ea6d82c (diff) | |
doc: Document rpf-lookup-mode changes
Signed-off-by: Nathan Bahr <nbahr@atcorp.com>
| -rw-r--r-- | doc/user/pim.rst | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/doc/user/pim.rst b/doc/user/pim.rst index ff45f21b56..c139e64880 100644 --- a/doc/user/pim.rst +++ b/doc/user/pim.rst @@ -217,7 +217,7 @@ PIM Routers never do SM over. This command is vrf aware, to configure for a vrf, specify the vrf in the router pim block. -.. clicmd:: rpf-lookup-mode MODE +.. clicmd:: rpf-lookup-mode MODE [group-list PREFIX_LIST] [source-list PREFIX_LIST] MODE sets the method used to perform RPF lookups. Supported modes: @@ -246,6 +246,18 @@ PIM Routers configured to make the configuration immune against possible changes in what the default behavior is. + If a group and/or source prefix list is provided, then the RPF lookup mode + will only apply to source, group addresses that match the given prefix list(s). + Not all RPF lookups have a valid group address when performing a lookup, e.g. RPF + to an RP only does a lookup to the RP address and has no specific group. + Lookups that do not have a specific group will only use lookup modes that do not + specify a group-list. + A global rpf lookup mode that does not have a group or source list is always installed + and, as documented above, uses the ``mrib-then-urib`` mode by default. + This can be changed with an rpf-lookup-mode MODE that does not specify group or source lists. + There can be any number of rpf lookup modes, as long as the combination of group and source + list is unique. + .. warning:: Unreachable routes do not receive special treatment and do not cause |