bgpd: fix prefix same as nexthop in label per nexthop #16990
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ton31337
reviewed
Oct 3, 2024
ton31337
reviewed
Oct 3, 2024
| "configure terminal\nrouter bgp 65500 vrf vrf1\naddress-family ipv6 unicast\nno redistribute static\n", | ||
| isjson=False, | ||
| ) | ||
| topotest.sleep(3, "Checking BGP VPNv6 labels on r2") |
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No sleep() into topotests please. Replace with run_and_expect() or similar stuff.
riw777
reviewed
Oct 8, 2024
added 2 commits
October 9, 2024 11:06
When a prefix is imported using the "network" command under a vrf, which is a connected prefix, and in the context of label allocation per nexthop: .. >router bgp 1 vrf vrf1 > address-family ipv4 unicast > redistribute static > network 172.16.0.1/32 <--- connected network > network 192.168.106.0/29 > label vpn export auto > label vpn export allocation-mode per-nexthop .. We encounter an MPLS entry where the nexthop is the prefix itself: > 18 BGP 172.16.0.1 - Actually, when using the "network" command, a bnc context is used, but it is filled by using the prefix itself instead of the nexthop for other BGP updates. Consequently, when picking up the original nexthop for label allocation, the function behaves incorrectly. Instead ensure that the nexthop type of bnc->nexthop is not a nexthop_ifindex; otherwise fallback to the per vrf label. Update topotests. Signed-off-by: Loïc Sang <[email protected]>
WARNING: topo: Waiting time is too small (count=10, wait=0.5), using default values (count=20, wait=3) Supress warning by inscreasing wait time. Signed-off-by: Loïc Sang <[email protected]>
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When a prefix is imported using the "network" command under a vrf, which
is a connected prefix, and in the context of label allocation per
nexthop:
..
We encounter an MPLS entry where the nexthop is the prefix itself:
Actually, when using the "network" command, a bnc context is used, but
it is filled by using the prefix itself instead of the nexthop for other
BGP updates. Consequently, when picking up the original nexthop for
label allocation, the function behaves incorrectly. Instead ensure that
the nexthop type of bnc->nexthop is not a nexthop_ifindex; otherwise
fallback to the per vrf label.
Update topotests.