Router Version : V3R006C001
Fault: Vpn routes advertised by PE1 was not recieved in routing table of PE2.
No Alarm Information Was Reported
1) First we check the routing table Advertize by PE1 to RR and found all routes were advertize
Command : "display bgp vpnv4 all routing-table peer x.x.x.x advertize-routes".
2) We check routing table in PE2 for particular VPN,routes advertize by PE1 was not recieved
Command : "display bgp vpnv4 vpn-instance NAME routing-table"
3)We check the routing table in RR and found that routes are not recieved through RD value assigned to that particular VPN in edge routers
Commands : "display bgp vpnv4 all routing-table"
4) We checked configuration of router,but we didn't got any missconfiguration
5)we start Debugging BGP Packets in RR1 and same time makes interface in same VPN UP & Down in PE1 and found that routes advertize by PE1 for particular VPN are rejected by RR1 due to RT value not matched.
Command :"debugging bgp packet"
We checked that RT value for that particular VPN was not imported in RR1,however command "Policy VPN-Target" was configured in RR1
The Affected VPN instance was not created in RR1. and "Policy VPN-Target" command was configured in RR1's vpnv4 Bgp family.
The RR1 was also working as edge router and was checking the RT value of incoming routes before downloading. Since RT value was not configured, so all the routes were rejected by RR1 for that particular VPN. Hence not advertised to PE2.
Suggestion: Whenever RR is also configured as PE router by applying command "Policy VPN-Target" we should import all RT values export by PE"s in network for that particular VPN