The customer reported a traffic loss after performing an EVPN DF switchover in an Active/Standby scenario with the mac-pinning feature enabled on the CE interface.
Total traffic drop after EVPN DF switchover in A/S with mac-pinning enabled on the CE interfaceThe traffic loss is due to the PE not being able to learn the ARP/NDP of the CE if the source of the ARP/NDP MAC address has already been learned and pinned.
< -- the traffic drop starts with those logs Jun 30 06:44:06 PE1_RE fpc0 L2ALM_DUPLICATE_IP_ADDR: l2alm_hw_insert_mac_ip_entry:3866 Duplicate IP 10.144.144.2 sent from address 2c:6b:f5:c6:8a:f0 in bd 2 Jun 30 06:44:31 PE1_RE fpc0 L2ALM_DUPLICATE_IP_ADDR: l2alm_hw_insert_mac_ip_entry:3802 Pinning mac address 2c:6b:f5:c6:8a:f0 exits in bd 2 Jun 30 06:54:29 PE1_RE fpc0 L2ALM_DUPLICATE_IP_ADDR: l2alm_hw_insert_mac_ip_entry:3802 Pinning mac address 2c:6b:f5:c6:8a:f0 exits in bd 2 Jun 30 06:58:38 PE1_RE fpc0 L2ALM_DUPLICATE_IP_ADDR: l2alm_hw_insert_mac_ip_entry:3802 Pinning mac address 2c:6b:f5:c6:8a:f0 exits in bd 2 Jun 30 07:03:45 PE1_RE fpc0 L2ALM_DUPLICATE_IP_ADDR: l2alm_hw_insert_mac_ip_entry:3802 Pinning mac address 2c:6b:f5:c6:8a:f0 exits in bd 2 Jun 30 07:08:45 PE1_RE fpc0 L2ALM_DUPLICATE_IP_ADDR: l2alm_hw_insert_mac_ip_entry:3802 Pinning mac address 2c:6b:f5:c6:8a:f0 exits in bd 2 Jun 30 07:13:45 PE1_RE fpc0 L2ALM_DUPLICATE_IP_ADDR: l2alm_hw_insert_mac_ip_entry:3802 Pinning mac address 2c:6b:f5:c6:8a:f0 exits in bd 2
This issue should be fixed via the pr 1820882