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fib: P2P interfaces do not need specific multicast adjacencies

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they can use the 'auto' adj for all traffic

Type: fix

Change-Id: Id2b9557683252a94badc8f9dfab5f7b2ae26f1ee
Signed-off-by: Neale Ranns <nranns@cisco.com>
(cherry picked from commit da0e7497ca)
This commit is contained in:
Neale Ranns
2019-10-07 22:44:54 -07:00
committed by Andrew Yourtchenko
parent 3bc9d5551a
commit 15800e9442
1 changed files with 18 additions and 3 deletions
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21
src/vnet/fib/fib_path.c
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@ -2571,9 +2571,24 @@ fib_path_contribute_forwarding (fib_node_index_t path_index,
/*
* Create the adj needed for sending IP multicast traffic
*/
ai = adj_mcast_add_or_lock(dpo_proto_to_fib(path->fp_nh_proto),
fib_forw_chain_type_to_link_type(fct),
path->attached.fp_interface);
if (vnet_sw_interface_is_p2p(vnet_get_main(),
path->attached.fp_interface))
{
/*
* point-2-point interfaces do not require a glean, since
* there is nothing to ARP. Install a rewrite/nbr adj instead
*/
ai = adj_nbr_add_or_lock(dpo_proto_to_fib(path->fp_nh_proto),
fib_forw_chain_type_to_link_type(fct),
&zero_addr,
path->attached.fp_interface);
}
else
{
ai = adj_mcast_add_or_lock(dpo_proto_to_fib(path->fp_nh_proto),
fib_forw_chain_type_to_link_type(fct),
path->attached.fp_interface);
}
dpo_set(dpo, DPO_ADJACENCY,
fib_forw_chain_type_to_dpo_proto(fct),
ai);