[c-nsp] Internet BGP autofailover

[Keegan Holley]

what do you mean by "isn't working".  No routes, traceroute dies, routes
but no traffic, only a subset of the destinations are reachable,etc..

2012/2/13 alex nyagah <alex.nyagah.k at gmail.com>

> Hi Group,
> I have the following configs in my router but auto failover between two ISP
> is not working, can someone please help..
>
>
> interface GigabitEthernet0/1
>  description Link to ISP_A
>  ip address 10.10.10.205 255.255.255.252
>  ip accounting output-packets
>  ip flow ingress
>  ip nbar protocol-discovery
>  duplex auto
>  speed auto
>  no negotiation auto
> !
> interface GigabitEthernet0/2
>  description Connection to ISP_2
>  ip address 20.20.20.34 255.255.255.252
>  ip accounting output-packets
>  ip flow ingress
>  ip nbar protocol-discovery
>  load-interval 30
>  duplex auto
>  speed auto
>  no negotiation auto
> !
> interface GigabitEthernet0/3
>  description Connection to WALTER LAN
>  ip address 10.20.30.254 255.255.255.0
>  ip tcp adjust-mss 1420
>  duplex auto
>  speed auto
>  no negotiation auto
> !
> router bgp 6450
>  bgp log-neighbor-changes
>  neighbor 20.20.20.33 remote-as 31177
>  neighbor 20.20.20.33 description ISP_A-BGP
>  neighbor 20.20.20.33 ebgp-multihop 8
>  neighbor 20.20.20.33 update-source GigabitEthernet0/2
>  neighbor 10.10.10.206 remote-as 9010
>  neighbor 10.10.10.206 description ISP_A-Ke-eBGP
>  neighbor 10.10.10.206 update-source GigabitEthernet0/1
>  maximum-paths 2
>  !
>  address-family ipv4
>  neighbor 20.20.20.33 activate
>  neighbor 20.20.20.33 weight 1000
>  neighbor 20.20.20.33 prefix-list WALTER-SUBNET out
>  neighbor 20.20.20.33 route-map ISP_B_IMPORT in
>  neighbor 10.10.10.206 activate
>  neighbor 10.10.10.206 weight 100
>  neighbor 10.10.10.206 prefix-list WALTER-SUBNET out
>  neighbor 10.10.10.206 route-map prepending in
>  maximum-paths 2
>  no auto-summary
>  no synchronization
>  network 10.20.30.0 mask 255.255.255.0
>  exit-address-family
> !
> ip route 10.20.30.0 255.255.255.0 Null0 254 name BGP-Advertisement
> ip flow-export source GigabitEthernet0/1
> ip flow-export version 5 origin-as
> !
> no ip http server
> !
> !
> !
> ip prefix-list DEFAULT seq 10 permit 0.0.0.0/0
> !
> ip prefix-list WALTER-SUBNET seq 5 permit 10.20.30.0/24
> ip prefix-list WALTER-SUBNET seq 10 deny 0.0.0.0/0 le 32
> !
> route-map ISP_B_IMPORT permit 10
>  match ip address prefix-list DEFAULT
> !
> route-map prepending permit 10
>  match ip address prefix-list DEFAULT
>
> --
> **
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