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MPLS LDP Is Not Generated for the Prefix of the VPN Routes Imported by an NE40E-X8

Publication Date:  2019-03-27 Views:  6 Downloads:  0
Issue Description

Device model: NE40E
Software version: V600R008
Symptom: MPLS LDP configuration is not generated for the direct link routes imported to the BGP VPNv4 instance address family.
https://support.huawei.com/enterprisecase/product/images/c080f9d996654da0b8ba8673339aa0ca

https://support.huawei.com/view/pages/main/images/transparent.gif

Handling Process

Check all the routing information about the prefix.
display bgp vpnv4 all routing-table X.X.3.0

https://support.huawei.com/enterprisecase/product/images/9aff1d81da6b42efa745cafa42f3980f
Remote routes have a higher priority than the locally imported routes. Therefore, remote routes are preferentially selected.

Root Cause

For the NE40E, the local preference of BGP routes is 100 by default. The local preference of the network segment prefix learned from the peer device is 200.
The locally imported prefix is not preferentially selected. Therefore, BGP does not assign LSP to the prefix.

Solution

Delete the local preference configured for the remote device.
 ipv4-family vpn-instance SXDD-VPN_1
  undo default local-preference

END