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When NE40E is interconnected with Huawei UMG media board through optical ports, primary interfaces and sub-interfaces are configured on NE40E and UMG boards to carry BFD packets and traffic respectively. (Huawei UMG GE port supports transparent transmission of VLAN tags.) In this manner, BFD packets and service traffic are separated logically. The BFD function works properly once it is enabled globally and static BFD session is configured.
bfd to_umg3_media bind peer-ip 192.168.0.2 interface GigabitEthernet2/0/1
discriminator local 8002
discriminator remote 8003
commitHowever, when NE40E (CE) was interconnected with a third-party media board through optical ports, the BFD session failed to be established when the previously mentioned configuration method was used.
Huawei performed the following operations to identify the cause:
1. Checked the BFD session status and found it failed to go up.
2. Cleared the statistics at the port on NE40E and counted the packets within a period. Based on the fact that the number of the sent packets was greater than that of the received packets, determined that reply packets were not received.3. Checked the interconnected third-party softswitch media device and found that the interconnection optical port did not support transparent transmission of VLAN tags and static BFD configurations were not supported.
To address the issue:
Huawei enabled ports on NE40E to carry the BFD packets and service traffic at the same time when NE40E is interconnected with a third-party media board through optical ports. Specifically, sub-interfaces were not configured on NE40E.
Huawei enabled BFD globally and dynamic BFD.
bfd to_umg2_media bind peer-ip 10.183.6.6 vpn-instance VPN_Media interface GigabitEthernet2/0/0 source-ip 10.183.6.5 autocommit