Hello,
I make a lab on GNS3 for training about route leaking between the global routing table and the VRF cust2.
The topology is simple. There are 3 routers :
-R1 represents the Internet router. He have some loopback interfaces in the IP range 212.x.x.x
-R2 implements two VRF (with cust2 VRF)
-R3 and R4 are simple routers running OSPF. Each one is on different VRF. In our case R4 is in cust2 VRF.
-A peering BGP is performed between R1 and R2.
In R2 all BGP routes exists in the routing table.
My goal is to import all BGP routes which exist in the global routing table of R2 to the VRF cust2 of R2.
I was inspired by this document http://www.cisco.com/en/US/docs/ios/12_2s/feature/guide/fs_bgivt.html
Here the configuration of R2
ip cef
ip vrf cust1
rd 1000:1
!
ip vrf cust2
rd 1000:2
import ipv4 unicast map bgp2vrf-cust2
!
interface Ethernet0/0
ip vrf forwarding cust1
ip address 192.168.3.1 255.255.255.0
half-duplex
!
interface Ethernet0/1
ip vrf forwarding cust2
ip address 192.168.2.1 255.255.255.0
half-duplex
!
interface Ethernet0/2
ip address 192.168.1.1 255.255.255.0
half-duplex
!
router ospf 1 vrf cust1
log-adjacency-changes
network 192.168.3.0 0.0.0.255 area 1
default-information originate always
!
router ospf 2 vrf cust2
log-adjacency-changes
redistribute bgp 199 subnets
network 192.168.2.0 0.0.0.255 area 2
default-information originate always
!
router bgp 199
bgp log-neighbor-changes
neighbor 192.168.1.2 remote-as 200
!
address-family ipv4
neighbor 192.168.1.2 activate
no auto-summary
no synchronization
network 192.168.1.0
exit-address-family
!
address-family ipv4 vrf cust2
no synchronization
exit-address-family
!
ip route 0.0.0.0 0.0.0.0 192.168.1.2
ip route 192.168.3.0 255.255.255.0 Ethernet0/0
ip route vrf cust1 0.0.0.0 0.0.0.0 192.168.1.2 global
!
ip prefix-list bgp2vrf-cust2 seq 5 permit 212.0.0.0/8
ip prefix-list bgp2vrf-cust2 seq 100 permit 0.0.0.0/0 le 32
!
route-map bgp2vrf-cust2 permit 10
match ip address prefix-list bgp2vrf-cust2
!
Here some show commands
R2#show ip bgp
BGP table version is 11, local router ID is 192.168.1.1
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
*> 192.168.1.0 0.0.0.0 0 32768 i
* 192.168.1.2 0 0 200 i
r> 192.168.1.1/32 192.168.1.2 0 0 200 ?
*> 212.1.1.0 192.168.1.2 0 0 200 ?
*> 212.1.2.0 192.168.1.2 0 0 200 ?
*> 212.1.3.0 192.168.1.2 0 0 200 ?
*> 212.1.4.0 192.168.1.2 0 0 200 ?
*> 212.1.5.0 192.168.1.2 0 0 200 ?
R2#
R2#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is 192.168.1.2 to network 0.0.0.0
B 212.1.1.0/24 [20/0] via 192.168.1.2, 00:24:27
B 212.1.3.0/24 [20/0] via 192.168.1.2, 00:24:27
B 212.1.2.0/24 [20/0] via 192.168.1.2, 00:24:27
B 212.1.5.0/24 [20/0] via 192.168.1.2, 00:24:27
B 212.1.4.0/24 [20/0] via 192.168.1.2, 00:24:27
C 192.168.1.0/24 is directly connected, Ethernet0/2
S 192.168.3.0/24 is directly connected, Ethernet0/0
S* 0.0.0.0/0 [1/0] via 192.168.1.2
R2#show ip vrf cust2
Name Default RD Interfaces
cust2 1000:2 Et0/1
R2#show ip route vrf cust2
Routing Table: cust2
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
C 192.168.2.0/24 is directly connected, Ethernet0/1
R2#show ip prefix-list detail
Prefix-list with the last deletion/insertion: bgp2vrf-cust2
ip prefix-list bgp2vrf-cust2:
count: 2, range entries: 1, sequences: 5 - 100, refcount: 3
seq 5 permit 212.0.0.0/8 (hit count: 0, refcount: 1)
seq 100 permit 0.0.0.0/0 le 32 (hit count: 0, refcount: 1)
R2#show route-map
route-map bgp2vrf-cust2, permit, sequence 10
Match clauses:
ip address prefix-lists: bgp2vrf-cust2
Set clauses:
Policy routing matches: 0 packets, 0 bytes
R2#show ip vrf detail
VRF cust1; default RD 1000:1; default VPNID <not set>
Interfaces:
Et0/0
Connected addresses are not in global routing table
No Export VPN route-target communities
No Import VPN route-target communities
No import route-map
No export route-map
VRF label distribution protocol: not configured
VRF cust2; default RD 1000:2; default VPNID <not set>
Interfaces:
Et0/1
Connected addresses are not in global routing table
No Export VPN route-target communities
No Import VPN route-target communities
Import route-map for ipv4 unicast: bgp2vrf-cust2 (prefix limit: 1000)
No export route-map
VRF label distribution protocol: not configured
Do you have an idea of the problem ? I want just import the global BGP route on the VRF cust2, the import doesn't work.
Thank you by advance for your help.
Regards
Cédric
