For the outbound connectivity, use the HSRP track feature. That "watches" an interface (the WAN link to your ISP). If that interface goes down, the HSRP priority of that router gets reduced, making the other router (with the good ISP link) the HSRP primary. HSRP will make it so no changes are required at your server.
As mentioned if you have Internet facing servers (mail server, web server), you really need BGP. However many ISPs will now accept advertisements as small as /24. So if you have a class C of registered addresses (or if you can get that) you can advertise it to both ISPs via BGP (even if it was assigned to you by one of the ISPs). Rob. CCIE 6922 ""Chris Charlebois"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Depends alot on what kind of connection you want. If you are just talking > about outbound access from your site, that isn't a problem. Setup the two > routers on the same subnet and use HSRP. Best practive would be to set up > two HSRP address; each router will be primarary for one address and backup > for the other. That way you can direct traffic over a specific connection > when it's all up, but traffic will failover to one connection if the other > goes down. > > If, on the other hand, you want to maintain public services during an outage > (ie, web pages, FTP sites, incoming e-mail), that is a gorilla of a > completly different color. If you're site is big enough, you could justify > a /19 public address, which can be routed via BGP. That would solve alot of > you're problems, but it's unlikely that you'd be asking the question if you > had a /19. Some protocols will allow you to specifiy a backup via DNS (I'm > thinking SMTP), but that only helps with mail. Otherwise, you're options > are co-locateing the equipment you always want available, or switching both > your WAN connections to the same ISP. THere is no really easy solution. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36378&t=36371 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
