If you don't advertise reachability, you aren't reachable. You should however be able to get one ISP to allow the other to route its space. Otherwise, you're looking at getting some PI space, multihoming to the same ISP, or using some load balancing tools to handle things via dns.
Pete At 04:28 PM 5/2/2002 -0400, Steven A. Ridder wrote: >Here's a question I can't seem to answer. I came up with a scenario in my >head, and now I can't find a solution. > >Example: I have a dual homed network via BGP. I have ISP 1 and they give me >209.21.220.1/20 for use, and ISP gives me 199.33.23.1/21. Say I use the >209.x.x.x for my web servers, mail server, etc, and advertise that back out >to the Internet via ISP 1 (the ISP that assigned me the block) and in DNS. >I'm assuming ISP 2 will not advertise that block for me, as it's ISP 1's >block. So, now the whole world knows to get to me via ISP 1. Then let's >say ISP 1 goes down, how would the world know how to get to me, if they only >knew how to get to me Via ISP 1 and it's IP's? > >-- >RFC 1149 Compliant > >Get in my head: >http://sar.dynu.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=43169&t=43163 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
