From: CCIE GURU (cisco.ccie.guru@gmail.com)
Date: Tue Aug 05 2008 - 04:05:24 ART
Hi, all
Thanks for adivce.
Yap, as-override solve problem.
Thanks
Regards
On Tue, Aug 5, 2008 at 2:35 PM, Rado Vasilev <decklandv@gmail.com> wrote:
> Hi,
>
> Your CE's use the same BGP AS# and therefore your CE1 router rejects the
> routes sent from PE1 as they contain its own AS# in the AS_PATH.
> You have to use neighbor .... as-override on both PE's connections to the
> customer edge...
>
> Regards,
> Rado
>
> Hello all gentelman!
>>
>> Here is my topology.And I am trying to build MPLS VPN. I want to advertise
>> routes from both CEs to each other across MPLS backbone.
>>
>> CE1------PE1-----Core1------Core2------PE2------CE2
>>
>> PE & CE are eBGP neighbor.
>>
>> Route from CE2 advertise to until PE1. But PE1 seems don't re-advertise
>> route from CE2 to CE1.
>>
>> PE1#sh ip bgp vpnv4 all neighbors 172.16.1.2 advertised-routes
>> BGP table version is 10, local router ID is 1.1.1.3
>> 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: 64512:1 (default for vrf one)
>> *>i1.1.1.6/32 1.1.1.4 0 100 0 64513 ?
>> *>i172.16.2.0/30 1.1.1.4 0 100 0 64513 ?
>> Total number of prefixes 2
>>
>> *Sh ip route on PE1*
>>
>> PE1#sh ip route vrf one
>> Routing Table: one
>> 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
>> 1.0.0.0/32 is subnetted, 2 subnets
>> B 1.1.1.5 [20/0] via 172.16.1.2, 00:22:14
>> B 1.1.1.6 [200/0] via 1.1.1.4, 00:22:14
>> 172.16.0.0/30 is subnetted, 2 subnets
>> C 172.16.1.0 is directly connected, FastEthernet1/0
>> B 172.16.2.0 [200/0] via 1.1.1.4, 00:22:14
>> PE1#
>>
>> *Here is PE1 config*
>>
>> PE1#sh run | b router bgp
>> router bgp 64512
>> no bgp default ipv4-unicast
>> bgp log-neighbor-changes
>> neighbor 1.1.1.4 remote-as 64512
>> neighbor 1.1.1.4 update-source Loopback0
>> !
>> address-family ipv4
>> neighbor 1.1.1.4 activate
>> no auto-summary
>> no synchronization
>> exit-address-family
>> !
>> address-family vpnv4
>> neighbor 1.1.1.4 activate
>> neighbor 1.1.1.4 send-community extended
>> exit-address-family
>> !
>> address-family ipv4 vrf one
>> neighbor 172.16.1.2 remote-as 64513
>> neighbor 172.16.1.2 activate
>> no auto-summary
>> no synchronization
>> exit-address-family
>>
>>
>> *CE verify*
>> **
>> CE1#sh 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 not set
>> 1.0.0.0/32 is subnetted, 1 subnets
>> C 1.1.1.5 is directly connected, Loopback0
>> 172.16.0.0/30 is subnetted, 1 subnets
>> C 172.16.1.0 is directly connected, FastEthernet0/0
>>
>> Please adivce.
>> Regards
>>
>>
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