Hello experts,
I am trying to configure InterAS L3VPN with Back to back VRF using ospf as the protocol between the 2 AS'es. Topology is very simple. Have an issue, plz let me knw if someone has seen it before
CE1---vrf(ospf)---AS1PE---AS1P---AS1ASBR1----VRF(ospf)---AS2ASBR2--AS2P----AS2PE---vrf(ospf)---CE2
Issue:
I am not able to import CE2 routes on AS1ASBR1 vrf route table. I can see them under "show ip ospf database", but dont see them being installed in the routing table.
On the other hand, I can import CE1 routes into AS2ASBR2 perfectly fine.
Here are some outputs from the routers.
CE1 not getting CE2 routes.
CE1#sh ip route
Gateway of last resort is not set
10.0.0.0/32 is subnetted, 1 subnets
C 10.10.7.7 is directly connected, Loopback0
30.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 30.30.67.0/24 is directly connected, GigabitEthernet1/0
L 30.30.67.7/32 is directly connected, GigabitEthernet1/0
CE1#
===================================================================
AS1PE#sh ip vrf
Name Default RD Interfaces
78 200:78 Fa0/0
AS1PE#
AS1PE#sh ip route vrf 78
Gateway of last resort is not set
10.0.0.0/32 is subnetted, 1 subnets
O 10.10.7.7 [110/2] via 30.30.67.7, 02:57:39, FastEthernet0/0
30.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 30.30.67.0/24 is directly connected, FastEthernet0/0
L 30.30.67.6/32 is directly connected, FastEthernet0/0
AS1PE#
AS1PE#sh ip bgp vpnv4 all
BGP table version is 17, local router ID is 172.16.6.6
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 200:78 (default for vrf 78)
*> 10.10.7.7/32 30.30.67.7 2 32768 ?
*> 30.30.67.0/24 0.0.0.0 0 32768 ?
AS1PE#
===============================================================================
CE2 routes are not being imported to vrf 78.
AS1ASBR1#sh ip route vrf 78
Gateway of last resort is not set
10.0.0.0/32 is subnetted, 1 subnets
B 10.10.7.7 [200/2] via 172.16.6.6, 02:57:46
20.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 20.20.34.0/24 is directly connected, FastEthernet0/1
L 20.20.34.4/32 is directly connected, FastEthernet0/1
30.0.0.0/24 is subnetted, 1 subnets
B 30.30.67.0 [200/0] via 172.16.6.6, 02:59:47
AS1ASBR1#
AS1ASBR1#sh ip bgp vpnv4 all
BGP table version is 17, local router ID is 172.16.4.4
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 200:78 (default for vrf 78)
*>i10.10.7.7/32 172.16.6.6 2 100 0 ?
*>i30.30.67.0/24 172.16.6.6 0 100 0 ?
AS1ASBR1#
AS1ASBR1#sh run | s router ospf
router ospf 18 vrf 78
log-adjacency-changes
redistribute bgp 200 subnets
network 20.20.0.0 0.0.255.255 area 0
AS1ASBR1#
I see CE2 route in ospf database though.
AS1ASBR1#sh ip ospf database
OSPF Router with ID (20.20.34.4) (Process ID 18)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
20.20.34.3 20.20.34.3 1672 0x80000007 0x009DFB 2
20.20.34.4 20.20.34.4 1620 0x80000004 0x009703 2
Summary Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
10.10.8.8 20.20.34.3 1930 0x80000004 0x001630 --->CE2 route
10.10.18.0 20.20.34.3 1930 0x80000004 0x00ED57
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
10.10.7.7 20.20.34.4 1620 0x80000004 0x009C09 3489661128
30.30.67.0 20.20.34.4 1620 0x80000004 0x004CFC 3489661128
AS1ASBR1#
================================================================================
================================================================================
CE2(config)#do sh ip int br
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 10.10.18.8 YES manual up up
Loopback0 10.10.8.8 YES manual up up
CE2(config)#
CE2 is getting CE1 routes.
CE2#sh ip route
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
O E2 10.10.7.7/32 [110/2] via 10.10.18.1, 01:55:25, FastEthernet0/0
C 10.10.8.8/32 is directly connected, Loopback0
C 10.10.18.0/24 is directly connected, FastEthernet0/0
L 10.10.18.8/32 is directly connected, FastEthernet0/0
20.0.0.0/24 is subnetted, 1 subnets
O IA 20.20.34.0 [110/2] via 10.10.18.1, 01:59:08, FastEthernet0/0
30.0.0.0/24 is subnetted, 1 subnets
O E2 30.30.67.0 [110/1] via 10.10.18.1, 01:55:25, FastEthernet0/0
CE2#
CE2#sh run | s router ospf
router ospf 8
log-adjacency-changes
network 10.10.0.0 0.0.255.255 area 1
CE2#
============================================================================================
AS2PE#sh ip int br
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 10.10.18.1 YES manual up up
FastEthernet0/1 192.168.12.1 YES manual up up
Loopback0 192.168.1.1 YES manual up up
AS2PE#
AS2PE#sh ip bgp vpnv4 all
BGP table version is 59, local router ID is 192.168.1.1
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 100:78 (default for vrf 78)
*>i10.10.7.7/32 192.168.3.3 2 100 0 200 i
*> 10.10.8.8/32 10.10.18.8 2 32768 ?
*> 10.10.18.0/24 0.0.0.0 0 32768 ?
*>i20.20.34.0/24 192.168.3.3 0 100 0 ?
*>i30.30.67.0/24 192.168.3.3 1 100 0 200 i
AS2PE#
===============================================================================================
AS2ASBR2#sh ip bgp vpnv4 all
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 100:78 (default for vrf 78)
*> 10.10.7.7/32 20.20.34.4 2 32768 200 i
*>i10.10.8.8/32 192.168.1.1 2 100 0 ?
*>i10.10.18.0/24 192.168.1.1 0 100 0 ?
*> 20.20.34.0/24 0.0.0.0 0 32768 ?
*> 30.30.67.0/24 20.20.34.4 1 32768 200 i
AS2ASBR2#
AS2ASBR2#sh ip vrf
Name Default RD Interfaces
78 100:78 Fa0/1
AS2ASBR2#
AS2ASBR2#sh run int fastEthernet 0/1
interface FastEthernet0/1
ip vrf forwarding 78
ip address 20.20.34.3 255.255.255.0
ip ospf network point-to-point
speed auto
duplex auto
AS2ASBR2#
AS2ASBR2#sh run | s router ospf
router ospf 18 vrf 78
log-adjacency-changes
redistribute bgp 100 subnets
network 20.20.0.0 0.0.255.255 area 0
router ospf 1
log-adjacency-changes
network 192.168.0.0 0.0.255.255 area 0
AS2ASBR2#
AS2ASBR2#sh run | s router bgp
router bgp 100
no synchronization
bgp log-neighbor-changes
neighbor 192.168.1.1 remote-as 100
neighbor 192.168.1.1 update-source Loopback0
neighbor 192.168.1.1 next-hop-self
no auto-summary
!
address-family vpnv4
neighbor 192.168.1.1 activate
neighbor 192.168.1.1 send-community extended
neighbor 192.168.1.1 next-hop-self
exit-address-family
!
address-family ipv4 vrf 78
no synchronization
redistribute ospf 18 vrf 78 match internal external 1 external 2
exit-address-family
AS2ASBR2#
==================================================================================================