BGP isn't installing routes Nexus 7000

[bjornarsb]

Hi

Routes are not installed in the routing table.

Se the following output:                

core# sh ip bgp 0.0.0.0 vrf vrf_bruker
BGP routing table information for VRF vrf_bruker, address family IPv4 Unicast
BGP routing table entry for 0.0.0.0/0, version 396
Paths: (1 available, best #0)
Flags: (0x080002) on xmit-list, is not in urib
  vpn: version 398, (0x100002) on xmit-list
  Path type: internal, path is invalid, imported same remote RD, no labeled nexthop
  AS-Path: NONE, path sourced internal to AS
    172.25.32.10 (metric 0) from 172.25.32.10 (172.25.32.10)
      Origin IGP, MED 0, localpref 100, weight 0
      Received label 1580
      Extcommunity:
          RT:65432:110
  VRF advertise information:
  VPN AF advertise information:

Has anyone an idea why ?

regards

bjornarsb

[Vivek Ruhil]

Path type: internal, path is invalid, imported same remote RD

Hi seems you have the same RD configured on both end.

[bjornarsb]

Hi

The routes are in the BGP table:

core# sh ip bgp vrf vrf_bruker all
BGP routing table information for VRF vrf_bruker, address family IPv4 Unicast
BGP table version is 433, local router ID is 172.22.5.30
Status: s-suppressed, x-deleted, S-stale, d-dampened, h-history, *-valid, >-best
Path type: i-internal, e-external, c-confed, l-local, a-aggregate, r-redist
Origin codes: i - IGP, e - EGP, ? - incomplete, | - multipath

   Network            Next Hop            Metric     LocPrf     Weight Path
  i0.0.0.0/0          172.25.32.10             0        100          0 i

[Vivek Ruhil]

Hi

You are right but if you see that route is also not the best route, otherwise you would have seen a ">" sign before the prefix.

Can you give me the output of show ip route vrf vrf_bruker ?

[bjornarsb]

Here is the output:

-core# sh ip route vrf vrf_bruker
IP Route Table for VRF "vrf_bruker"
'*' denotes best ucast next-hop
'**' denotes best mcast next-hop
'[x/y]' denotes [preference/metric]
'%' in via output denotes VRF

172.22.5.30/32, ubest/mbest: 2/0, attached
    *via 172.22.5.30, Lo5, [0/0], 14w4d, local
    *via 172.22.5.30, Lo5, [0/0], 14w4d, direct

[Vivek Ruhil]

Hi

You don't have the route for your next hop in the routing table 172.25.32.10. That is the reason this is not getting installed.

[bjornarsb]

Hi.

This is MBGP. I can ping 172.25.32.10 in the global routing table

core# ping 172.25.32.10

PING 172.25.32.10 (172.25.32.10): 56 data bytes

64 bytes from 172.25.32.10: icmp_seq=0 ttl=254 time=0.896 ms

64 bytes from 172.25.32.10: icmp_seq=1 ttl=254 time=0.567 ms

64 bytes from 172.25.32.10: icmp_seq=2 ttl=254 time=0.611 ms

64 bytes from 172.25.32.10: icmp_seq=3 ttl=254 time=0.549 ms

64 bytes from 172.25.32.10: icmp_seq=4 ttl=254 time=0.575 ms

[Vivek Ruhil]

Can you send me the configuration of both the PE routers ?

[bjornarsb]

Hi

Thanks for the help.

Here is the relevant config:

NEXUS:

interface loopback0
  ip address 172.25.32.11/32

router bgp 65432
  router-id 172.25.32.11
  log-neighbor-changes
  address-family ipv4 unicast
  neighbor 172.25.32.10
    remote-as 65432
    update-source loopback0
    address-family ipv4 unicast
      send-community extended
    address-family vpnv4 unicast
      send-community extended
  vrf vrf_bruker
    address-family ipv4 unicast
      network 172.22.5.30/32
    neighbor 172.22.5.26 remote-as 65103
      address-family ipv4 unicast

ip route 172.25.32.10/32 172.22.5.6

interface Ethernet6/1
  mpls ip
  mtu 8092
  ip address 172.22.5.5/30
  no shutdown

6500:
!
interface Loopback1
ip address 172.25.32.10 255.255.255.255
no ip redirects
!
interface Gig3/1
mpls ip
mtu 8092
ip address 172.22.5.6/30

router bgp 65432
bgp router-id 172.25.32.10
bgp log-neighbor-changes
neighbor 172.25.32.11 remote-as 65432
neighbor 172.25.32.11 update-source Loopback1

address-family ipv4
  neighbor 172.25.32.11 activate
  neighbor 172.25.32.11 send-community extended
  no auto-summary
  no synchronization
exit-address-family

address-family vpnv4
  neighbor 172.25.32.11 activate
  neighbor 172.25.32.11 send-community extended
   exit-address-family
!

ip route 172.25.32.11 255.255.255.255 172.22.5.5