Tim's Technology Journey Wiki

! Configure directly connected neighbors with iBGP inside a VRF

hostname hub
!
vrf definition viasat
 rd 65000:65000
 !
 address-family ipv4
 exit-address-family
!
interface Loopback1
 vrf forwarding viasat
 ip address 1.1.1.2 255.255.255.255
!
interface GigabitEthernet3
 vrf forwarding viasat
 ip address 172.16.0.1 255.255.255.252
!
router bgp 65000
 bgp router-id 1.1.1.1
 !
 address-family ipv4 vrf viasat
  network 1.1.1.2 mask 255.255.255.255
  neighbor 172.16.0.2 remote-as 65000
  neighbor 172.16.0.2 activate
 exit-address-family
!
hub#  show bgp vrf viasat
% Command accepted but obsolete, unreleased or unsupported; see documentation.

BGP table version is 3, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, 
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter, 
              x best-external, a additional-path, c RIB-compressed, 
              t secondary path, L long-lived-stale,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
Route Distinguisher: 65000:65000 (default for vrf viasat)
 *>   1.1.1.2/32       0.0.0.0                  0         32768 i
 *>i  2.2.2.3/32       172.16.0.2               0    100      0 i
!
hub#ping 2.2.2.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.3, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
hub#ping vrf viasat 2.2.2.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/2 ms
!
hub#show bgp vrf viasat neighbors            
% Command accepted but obsolete, unreleased or unsupported; see documentation.

BGP neighbor is 172.16.0.2,  vrf viasat,  remote AS 65000, internal link
  BGP version 4, remote router ID 2.2.2.2
  BGP state = Established, up for 00:10:47
!
---------------------------
hostname two
!
vrf definition viasat
 rd 65000:65000
 !
 address-family ipv4
 exit-address-family
!
interface Loopback1
 vrf forwarding viasat
 ip address 2.2.2.3 255.255.255.255
!
interface GigabitEthernet3
 vrf forwarding viasat
 ip address 172.16.0.2 255.255.255.252
!
router bgp 65000
 bgp router-id 2.2.2.2
 bgp log-neighbor-changes
 !
 address-family ipv4 vrf viasat
  network 2.2.2.3 mask 255.255.255.255
  neighbor 172.16.0.1 remote-as 65000
  neighbor 172.16.0.1 activate
 exit-address-family
!
two# show bgp vrf viasat
% Command accepted but obsolete, unreleased or unsupported; see documentation.

BGP table version is 3, local router ID is 2.2.2.2
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, 
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter, 
              x best-external, a additional-path, c RIB-compressed, 
              t secondary path, L long-lived-stale,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
Route Distinguisher: 65000:65000 (default for vrf viasat)
 *>i  1.1.1.2/32       172.16.0.1               0    100      0 i
 *>   2.2.2.3/32       0.0.0.0                  0         32768 i
!
two#ping 1.1.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
two#ping vrf viasat 1.1.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms