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bgpd: Extract link bandwidth value from extcommunity before using for WCMP#19165

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donaldsharp merged 2 commits intoFRRouting:masterfrom
opensourcerouting:fix/weighted_ecmp_link_bandwidth_between_vrfs
Jul 10, 2025
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bgpd: Extract link bandwidth value from extcommunity before using for WCMP#19165
donaldsharp merged 2 commits intoFRRouting:masterfrom
opensourcerouting:fix/weighted_ecmp_link_bandwidth_between_vrfs

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@ton31337 ton31337 commented Jul 10, 2025

Closes #19161

ton31337 added 2 commits July 10, 2025 13:22
… WCMP

Extended communities are exported/imported correctly between VRFs, but we need
to extract the actual link-bandwidth value from the extended communities.

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
@frrbot frrbot bot added bgp tests Topotests, make check, etc labels Jul 10, 2025
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@Mergifyio backport dev/10.4 stable/10.3 stable/10.2 stable/10.1 stable/10.0

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mergify bot commented Jul 10, 2025

@donaldsharp donaldsharp merged commit 8dcb5a9 into FRRouting:master Jul 10, 2025
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@ton31337 ton31337 deleted the fix/weighted_ecmp_link_bandwidth_between_vrfs branch July 10, 2025 18:45
donaldsharp added a commit that referenced this pull request Jul 11, 2025
bgpd: Extract link bandwidth value from extcommunity before using for WCMP (backport #19165)
donaldsharp added a commit that referenced this pull request Jul 11, 2025
bgpd: Extract link bandwidth value from extcommunity before using for WCMP (backport #19165)
donaldsharp added a commit that referenced this pull request Jul 11, 2025
bgpd: Extract link bandwidth value from extcommunity before using for WCMP (backport #19165)
donaldsharp added a commit that referenced this pull request Jul 11, 2025
bgpd: Extract link bandwidth value from extcommunity before using for WCMP (backport #19165)
donaldsharp added a commit that referenced this pull request Jul 11, 2025
bgpd: Extract link bandwidth value from extcommunity before using for WCMP (backport #19165)
ton31337 added a commit to opensourcerouting/frr that referenced this pull request Aug 2, 2025
* bgpd: correct no form commands (backport FRRouting#18911)
* bgpd: fix to show exist/non-exist-map in 'show run' properly FRRouting#18853
* redhat: make FRR RPM build to work on RedHat 10 (backport FRRouting#18920)
* build: check for libunwind.h, not unwind.h (backport FRRouting#18912)
* bgpd: use AS4B format for BGP loc-rib messages. (backport FRRouting#18936)
* bgpd: fix for the validity and the presence of prefixes in the BGP VPN table. (backport FRRouting#17370)
* bgpd: Force adj-rib-out updates if MRAI is kicked in (backport FRRouting#18959)
* zebra: Provide SID value when sending SRv6 SID release notify message (backport FRRouting#18971)
* bgpd: Fix crash when fetching statistics for bgp instance (backport FRRouting#19003)
* nhrpd: fix crash when accessing invalid memory zone (backport FRRouting#18994)
* zebra: Initialize RB tree for router tables (backport FRRouting#19049)
* zebra: fix null pointer dereference in zebra_evpn_sync_neigh_del (backport FRRouting#19054)
* zebra: fix stale NHG in kernel (backport FRRouting#18899)
* bgpd: Fix incorrect stripping of transitive extended communities (backport FRRouting#19065)
* lib: Fix no on-match goto NUM command (backport FRRouting#19108)
* bgpd: Fix extended community check for IP non-transitive type (backport FRRouting#19097)
* bgpd: Fix DEREF_OF_NULL.EX.COND in bgp_updgrp_packet (backport FRRouting#19126)
* lib: revert addition of vtysh_flush() call in vty_out() (backport FRRouting#19109)
* bgpd: Extract link bandwidth value from extcommunity before using for WCMP (backport FRRouting#19165)
* Use ipv4 class E addresses (240.0.0.0/4) as connected routes by default (backport FRRouting#18095)
* bfdd: Set bfd.LocalDiag when transitioning to AdminDown (backport FRRouting#18592)
* zebra: clean up a json object leak (backport FRRouting#19192)
* bgpd: Do not try to reuse freed route-maps (backport FRRouting#19191)
* lib: fix routemap crash (backport FRRouting#19127)
* bgpd: initialize local variable (backport FRRouting#19233)
* ospfd: Use after free cleanup of lsa (backport FRRouting#19224)
* vtysh: copy config from file should actually apply (backport FRRouting#19242)
* bgpd : Fix compilation error in bgpd module: Update TP_ARGS for bgp (backport FRRouting#19266)
* bgpd: Ensure addpath does not withdraw selected route in some situations (backport FRRouting#19210)
* lib, zebra: mark singleton nexthops inactive/active on link state changes for wecmp (backport FRRouting#18947)
* eigrp: validate hello packets and tlvs better (backport FRRouting#19251)
* bgpd: [GR] fixed selectionDeferralTimer to display select_defer_time val FRRouting#19283

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
ton31337 added a commit to opensourcerouting/frr that referenced this pull request Aug 2, 2025
* bgpd: correct no form commands (backport FRRouting#18911)
* build: check for libunwind.h, not unwind.h (backport FRRouting#18912)
* redhat: make FRR RPM build to work on RedHat 10 (backport FRRouting#18920)
* bgpd: use AS4B format for BGP loc-rib messages. (backport FRRouting#18936)
* bgpd: Force adj-rib-out updates if MRAI is kicked in (backport FRRouting#18959)
* zebra: Provide SID value when sending SRv6 SID release notify message (backport FRRouting#18971)
* nhrpd: fix crash when accessing invalid memory zone (backport FRRouting#18994)
* lib: Fix no on-match goto NUM command (backport FRRouting#19108)
* bgpd: Fix DEREF_OF_NULL.EX.COND in bgp_updgrp_packet (backport FRRouting#19126)
* bgpd: Extract link bandwidth value from extcommunity before using for WCMP (backport FRRouting#19165)
* bfdd: Set bfd.LocalDiag when transitioning to AdminDown (backport FRRouting#18592)
* bgpd: Do not try to reuse freed route-maps (backport FRRouting#19191)
* lib: fix routemap crash (backport FRRouting#19127)
* lib, zebra: mark singleton nexthops inactive/active on link state changes for wecmp (backport FRRouting#18947)
* bgpd: [GR] fixed selectionDeferralTimer to display select_defer_time val FRRouting#19284

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
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Weighted ECMP (Link-Bandwidth) Fails When Routes are Leaked Between VRFs

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