Monitoring BGP Next Hops for VPN

Purpose

Display information about BGP next hops.

Action

To display the next hops for all the VRFs:

host1:pe2#show ip bgp vpnv4 all next-hops
Indirect next-hop 10.1.1.1
  Resolution in IP route table of VR 
       IP indirect next-hop index 10
       Reachable (metric 3)
       Number of direct next-hops is 1
              Direct next-hop ATM4/1.20 (10.20.20.1)
  Resolution in IP tunnel-route table of VR 
       MPLS indirect next-hop index 17
       Reachable (metric 3)
       Number of direct next-hops is 1
              Direct next-hop: MPLS next-hop 18
  Reference count is 1
Indirect next-hop 10.21.21.2
  Resolution in IP route table of VR 
       IP indirect next-hop index 5
       Reachable (metric 0)
       Number of direct next-hops is 1
              Direct next-hop ATM4/0.21 (10.21.21.2)
  Resolution in IP tunnel-route table of VR 
       MPLS indirect next-hop index 14
       Reachable (metric 0)
       Number of direct next-hops is 1
              Direct next-hop ATM4/0.21.mpls
  Reference count is 3

To display the next hops for specified VRFs:

host1:pe2#show ip bgp vpnv4 vrf pe22 next-hops
Indirect next-hop 10.61.61.2
  Resolution in IP route table of VRF pe22
       IP indirect next-hop index 3
       Reachable (metric 0)
       Number of direct next-hops is 1
              Direct next-hop ATM4/0.61 (10.61.61.2)
  Resolution in IP tunnel-route table of VRF pe22
       Not reachable
  Reference count is 2

Meaning

Table 95 lists the show ip bgp next-hop command output fields.

Table 95: show ip bgp next-hop Output Fields

Field Name

Field Description

Indirect next-hop

BGP next-hop attribute as received in the BGP update message

Resolution

Describes where the indirect next hop is resolved: the IP routing table, the IP tunnel routing table, or both, and whether this is in a VR or VRF

IP indirect next-hop index

Index number of the IP indirect next hop that this BGP indirect next hop resolves to

MPLS indirect next-hop index

Index number of the MPLS indirect next hop that this BGP indirect next hop resolves to

Reachable

Indicates whether or not the indirect next hop is reachable.

Metric

Metric of the BGP indirect next hop

Number of direct next-hops

Number of the equal-cost legs of direct next hops that this indirect next hop resolves to

Direct next-hop

IP interface and next-hop IP address that resolve the BGP indirect next hop; the direct next hop can also be an IP indirect next hop or an MPLS indirect next hop when chains of next hops are in use

Reference count

Number of label mappings of BGP routes that use this next hop

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