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bgpd: release manual vpn label on instance deletion

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When a BGP instance with a manually assigned VPN label is deleted, the
label is not released from the Zebra label registry. As a result,
reapplying a configuration with the same manual label leads to VPN
prefix export failures.

For example, with the following configuration:

> router bgp 65000 vrf BLUE
>  address-family ipv4 unicast
>   label vpn export <int>

Release zebra label registry on unconfiguration.

Fixes: d162d5f6f5 ("bgpd: fix hardset l3vpn label available in mpls pool")
Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>
(cherry picked from commit d6363625c3)
This commit is contained in:
Louis Scalbert 2025-02-12 13:49:50 +01:00 committed by Mergify
parent dcebe85aa6
commit 6a72facbdc
1 changed files with 10 additions and 0 deletions
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10
bgpd/bgpd.c
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@ -4063,9 +4063,19 @@ int bgp_delete(struct bgp *bgp)
vpn_leak_zebra_vrf_sid_withdraw(bgp, afi);
}
/* release auto vpn labels */
bgp_vpn_release_label(bgp, AFI_IP, true);
bgp_vpn_release_label(bgp, AFI_IP6, true);
/* release manual vpn labels */
for (afi = AFI_IP; afi < AFI_MAX; afi++) {
if (!CHECK_FLAG(bgp->vpn_policy[afi].flags, BGP_VPN_POLICY_TOVPN_LABEL_MANUAL_REG))
continue;
bgp_zebra_release_label_range(bgp->vpn_policy[afi].tovpn_label,
bgp->vpn_policy[afi].tovpn_label);
UNSET_FLAG(bgp->vpn_policy[afi].flags, BGP_VPN_POLICY_TOVPN_LABEL_MANUAL_REG);
}
hook_call(bgp_inst_delete, bgp);
FOREACH_AFI_SAFI (afi, safi)