05-20-2015 08:09 AM - edited 03-05-2019 01:30 AM
Dear All,
Hello! I'm running a ISP. I have a CISCO 7204 Router. I take bandwidth from an IIG. They provide me two peering IP block (main and backup) and I configure BGP in router with one of them (main link). Config sample is given below:
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interface GigabitEthernet0/1
description IIG-Backup
ip address 43.245.140.162 255.255.255.252
duplex auto
speed auto
media-type rj45
no negotiation auto
!
interface GigabitEthernet0/2
description IIG-main
ip address 103.15.245.2 255.255.255.252
duplex auto
speed auto
media-type rj45
no negotiation auto
............................................
router bgp 38192
no synchronization
bgp log-neighbor-changes
network 43.245.244.0 mask 255.255.252.0
network 43.245.244.0 mask 255.255.255.0
network 43.245.245.0 mask 255.255.255.0
network 43.245.246.0
network 43.245.246.0 mask 255.255.255.0
network 43.245.247.0
network 43.245.247.0 mask 255.255.255.0
neighbor 103.15.245.1 remote-as 58717
neighbor 103.15.245.1 description "eBGP With IIG"
neighbor 103.15.245.1 soft-reconfiguration inbound
neighbor 103.15.245.1 prefix-list IIG-in in
neighbor 103.15.245.1 prefix-list IIG-out out
no auto-summary
!
ip default-gateway 103.15.245.1
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So you guys understand that my primary IIG link configured in Gb0/2 interface and I also done BGP. My IIG given me another peering IP in Gb0/1 to use as redundant. So that if primary link goes down, secondary link UP automatically and all internet traffic goes through this. But How can I configure another BGP for secondary link? How to configure Gb0/1 as auto redundant link? So that If Gb0/2 goes down (Fiber cut or any reason) then I can get internet using Gb0/1 (secondary link) automatically.
Can anybody help me here? Thanks.
05-21-2015 06:13 AM
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Often that's a simple as configuring another neighbor <new IP> remote-as #.
You may also need to have similar bgp neighbor statements, for the new IP, like you do for your existing neighbor.
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