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pimd, pim6d: Don't track nexthop for RP 0.0.0.0 & 0::0

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Topology:
========
FHR----Source

Problem:
=======
When FHR receives multicast traffic, there is no RP configured,
PIMD does NHT register for RP address 0.0.0.0 and group 224.0.0.0/4
PIM6D does NHT register for RP address 0::0 and group FF00::0/8

frr# show ip pim nexthop
Number of registered addresses: 1
Address         Interface        Nexthop
---------------------------------------------

frr# show ipv6 pim nexthop
Number of registered addresses: 1
Address         Interface        Nexthop
---------------------------------------------

Fix:
====
Dont track nexthop for RP 0.0.0.0 & 0::0.

frr# show ip pim nexthop
Number of registered addresses: 0

frr# show ipv6 pim nexthop
Number of registered addresses: 0

Issue: #12104

Signed-off-by: Sarita Patra <saritap@vmware.com>
This commit is contained in:
Sarita Patra 2023-02-25 00:33:13 -08:00
parent ba995a720b
commit 201a31b977
1 changed files with 8 additions and 0 deletions
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8
pimd/pim_rp.c
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@ -1066,6 +1066,14 @@ struct pim_rpf *pim_rp_g(struct pim_instance *pim, pim_addr group)
if (rp_info) {
pim_addr nht_p;
if (pim_addr_is_any(rp_info->rp.rpf_addr)) {
if (PIM_DEBUG_PIM_NHT_RP)
zlog_debug(
"%s: Skipping NHT Register since RP is not configured for the group %pPA",
__func__, &group);
return &rp_info->rp;
}
/* Register addr with Zebra NHT */
nht_p = rp_info->rp.rpf_addr;
if (PIM_DEBUG_PIM_NHT_RP)