Dear Members,
i have a problem with redistributing OSPF routes in my MPLS VPN. My local routes are redistributed into the MPLS VPN which is running BGP. This is the configuration of the edge router.
!
hostname CU_EDGE01
!
ip vrf CU_A
rd 100:26
route-target export 100:26
route-target import 100:26
!
interface Loopback0
ip address 1.1.1.252 255.255.255.255
ip router isis
!
interface FastEthernet0/0
description LINK TO Customer Router 01 FA0/0
no ip address
speed 100
full-duplex
!
interface FastEthernet0/0.26
encapsulation dot1Q 26
ip vrf forwarding CU_A
ip address 172.16.2.5 255.255.255.252
!
interface FastEthernet0/1
description LINK TO P_ROUTER_FA0/0
ip address 1.1.1.2 255.255.255.252
ip router isis
speed 100
full-duplex
mpls ip
!
router ospf 100 vrf CU_A
log-adjacency-changes
redistribute bgp 100 metric 20 subnets
network 172.16.2.4 0.0.0.3 area 0
!
router isis
net 41.0000.0000.0004.00
is-type level-1
!
router bgp 100
no bgp default ipv4-unicast
bgp log-neighbor-changes
neighbor 1.1.1.251 remote-as 100
neighbor 1.1.1.251 update-source Loopback0
!
address-family ipv4
neighbor 1.1.1.251 activate
no auto-summary
no synchronization
exit-address-family
!
address-family vpnv4
neighbor 1.1.1.251 activate
neighbor 1.1.1.251 send-community both
exit-address-family
!
address-family ipv4 vrf CU_A
redistribute ospf 100 vrf CU_A match internal external 1 external 2
no synchronization
exit-address-family
the routes are redistributed in the BGP process as desired. See the output.
CU_EDGE01#show ip bgp vpnv4 all
BGP table version is 9, local router ID is 1.1.1.252
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: 100:26 (default for vrf CU_A)
*>i10.2.2.0/24 1.1.1.251 11 100 0 ?
*> 10.3.0.1/32 172.16.2.6 2 32768 ?
*> 172.16.2.4/30 0.0.0.0 0 32768 ?
*>i172.16.20.4/30 1.1.1.251 0 100 0 ?
CU_EDGE01#
Also in the OSPF Database i can see the routes.
CU_EDGE01#show ip ospf database
OSPF Router with ID (172.16.2.5) (Process ID 100)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
172.16.2.5 172.16.2.5 30 0x80000002 0x007AA4 1
172.16.2.6 172.16.2.6 31 0x80000002 0x0072AB 1
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
172.16.2.6 172.16.2.6 31 0x80000001 0x000526
Summary Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
10.2.2.0 172.16.2.5 17 0x80000001 0x005B7B
10.3.0.1 172.16.2.6 66 0x80000001 0x001E4B
172.16.20.4 172.16.2.5 17 0x80000001 0x006FA3
The route from the far end is the 10.2.2.0/24. The down bit is also set.
CU_EDGE01#show ip ospf database summary 10.2.2.0
OSPF Router with ID (172.16.2.5) (Process ID 100)
Summary Net Link States (Area 0)
LS age: 134
Options: (No TOS-capability, DC, Downward)
LS Type: Summary Links(Network)
Link State ID: 10.2.2.0 (summary Network Number)
Advertising Router: 172.16.2.5
LS Seq Number: 80000001
Checksum: 0x5B7B
Length: 28
Network Mask: /24
TOS: 0 Metric: 20
in the routing table of the vrf CU_A i see the routes. My qestion here is, why the route to 10.2.20/24 is a BGP route and not a OSPF route?
CU_EDGE01#show ip route vrf CU_A
Routing Table: CU_A
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
172.16.0.0/30 is subnetted, 2 subnets
B 172.16.20.4 [200/0] via 1.1.1.251, 00:02:57
C 172.16.2.4 is directly connected, FastEthernet0/0.26
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
O IA 10.3.0.1/32 [110/2] via 172.16.2.6, 00:03:05, FastEthernet0/0.26
B 10.2.2.0/24 [200/11] via 1.1.1.251, 00:02:57
CU_EDGE01#
on the local router the routes are also in the OSPF Database
CU_RT1#show ip ospf database
OSPF Router with ID (172.16.2.6) (Process ID 100)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
172.16.2.5 172.16.2.5 258 0x80000002 0x007AA4 1
172.16.2.6 172.16.2.6 258 0x80000002 0x0072AB 1
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
172.16.2.6 172.16.2.6 258 0x80000001 0x000526
Summary Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
10.2.2.0 172.16.2.5 245 0x80000001 0x005B7B
10.3.0.1 172.16.2.6 293 0x80000001 0x001E4B
172.16.20.4 172.16.2.5 245 0x80000001 0x006FA3
Router Link States (Area 10)
Link ID ADV Router Age Seq# Checksum Link count
172.16.2.6 172.16.2.6 298 0x80000001 0x00C9CF 1
Summary Net Link States (Area 10)
Link ID ADV Router Age Seq# Checksum
172.16.2.4 172.16.2.6 301 0x80000001 0x00F8BE
Summary ASB Link States (Area 10)
Link ID ADV Router Age Seq# Checksum
172.16.2.5 172.16.2.6 261 0x80000001 0x00F2BF
CU_RT1#
but on the routing table for the vrf CU_A i cannot see the route to 10.2.2.0/24
CU_RT1#show ip route vrf CU_A
Routing Table: CU_A
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
172.16.0.0/30 is subnetted, 1 subnets
C 172.16.2.4 is directly connected, FastEthernet0/0.26
10.0.0.0/16 is subnetted, 1 subnets
C 10.3.0.0 is directly connected, Loopback103
CU_RT1#
Does anybody has an explaination for the missing OSPF routes?
Thank you very much in advanced
Alex
