Re: [isp-bgp] Multiple ISP Support

[Nandu Kombiyil <nkombiyil@...>]

Use BGP - its definitely a better option. isp's will send youa 
default route and you can advertise your public address space to them.
failover will be seemless in case of link failure or other issues.
cheers
-nk

On Fri, 22 Oct 2004 14:47:37 +0530, Mahesh S Kudva
<mahesh.kudva@...> wrote:
> Hi all
> 
> I have two ISP leased lines. I want to combine them on my Cisco 2620XM
> router without using BGP. I want to configure the second one as a backup
> for the other so that one fails the other one can take up the load.
> 
> I am also given a ip block from each ISP's
> ISP A --> a.a.a.a/yy (Primary Link)
> ISP B --> b.b.b.b/zz (Backup/Secondary Link)
> 
> Is it possible to divert all the traffic when primary link goes down to
> the secondary link without using BGP and without changing the IP Address
> to the one provided by the ISP B
> 
> Here is what I have tried..
> 
> (config)# int s0/0
> (config-if)# backup int s0/1
> (config-if)# backup delay 5 5
> (config)# ip route 0.0.0.0 0.0.0.0 s0/0   (all traffic on primary)
> (config)# ip route 0.0.0.0 0.0.0.0 s0/1   (all traffic on secondary,
>                                            fires if primary goes down)
> (config)# int e0/0
> (config-if)# ip address a.a.a.a/yy
> (config-if)# ip address b.b.b.b/zz secondary
> 
> I have some servers running on global ip's and cannot change them that
> are used from behind the router also ex:mail server, firewall, vpn server.
> 
> All suggestions and ideas are welcome.
> 
> Thanks in advance...
> 
> Regards & Thanks
> ================
> Mahesh S Kudva
> 
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