I can see the connectivity established withing sites of VPN_B. But in case of VPN_A R6 & R1 advertises VPN_A routes to R4 but since there is no VPN_A vrf configured on R4 they are not exchanged. Can anyone throw some light on this.
R6#sh ip bgp vp all neighbors 34.1.4.4 adv
BGP table version is 29, local router ID is 34.1.6.6
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 100:1 (default for vrf VPN_A)
*> 10.1.8.8/32 10.1.68.8 0 32768 ?
*> 10.1.68.0/24 0.0.0.0 0 32768 i
Route Distinguisher: 100:2 (default for vrf VPN_B)
*> 54.1.1.0/24 0.0.0.0 0 32768 ?
*> 212.18.0.0 54.1.1.254 1 32768 ?
*> 212.18.1.0 54.1.1.254 1 32768 ?
*> 212.18.2.0 54.1.1.254 1 32768 ?
*> 212.18.3.0 54.1.1.254 1 32768 ?
Total number of prefixes 7
R6#
R4#sh ip bgp vp all nei 34.1.6.6 routes
BGP table version is 19, local router ID is 34.1.4.4
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 100:2 (default for vrf VPN_B)
*>i54.1.1.0/24 34.1.6.6 0 100 0 ?
*>i212.18.0.0 34.1.6.6 1 100 0 ?
*>i212.18.1.0 34.1.6.6 1 100 0 ?
*>i212.18.2.0 34.1.6.6 1 100 0 ?
*>i212.18.3.0 34.1.6.6 1 100 0 ?
Total number of prefixes 5
R4#
R1#sh ip bgp vp all nei 34.1.4.4 adv
BGP table version is 34, local router ID is 13.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 100:1 (default for vrf VPN_A)
*> 10.1.7.0/24 10.1.17.7 1 32768 ?
*> 10.1.17.0/24 0.0.0.0 0 32768 ?
*> 192.10.1.0 10.1.17.7 1 32768 ?
*> 205.90.31.0 10.1.17.7 8 32768 ?
*> 220.20.3.0 10.1.17.7 8 32768 ?
*> 222.22.2.0 10.1.17.7 8 32768 ?
Route Distinguisher: 100:2 (default for vrf VPN_B)
*> 10.1.71.0/24 0.0.0.0 0 32768 ?
*> 10.1.77.0/24 10.1.71.7 1 32768 ?
*> 204.12.1.0 10.1.71.7 1 32768 ?
R1#
R4#sh ip bgp vp all nei 13.1.1.1 routes
BGP table version is 19, local router ID is 34.1.4.4
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 100:2 (default for vrf VPN_B)
*> 10.1.71.0/24 13.1.1.1 0 0 13 ?
*> 10.1.77.0/24 13.1.1.1 1 0 13 ?
*> 204.12.1.0 13.1.1.1 1 0 13 ?
Total number of prefixes 3
R4#