>I have a question for IGP that goes like this > >Given a lab scenario I have redistributed OSPF and ISIS (Mutual). In the same >Lab OSPF and EIGRP (Mutual) on other router. > >There is only one OSPF process. All seems to be working fine. > >How can one identify if there is a routing loop inthis = any show command? > >Thanks in advance > >regards
How about "show ip routing loops" ? Just kidding. :-) Seriously, it really depends on your configuration and where the redistribution is taking place. It gets to be more difficult as your routing table grows, but show ip route is as good as any command. If you see any routes that say "possibly down" that's a good indicator that you might have issues. Another sure sign is if you see routes originating from the wrong domain, e.g. routes originating in the OSPF domain showing up as EIGRP routes. Another way to tell is to use 'debug ip routing' and watch the changes in the routing table as they take place. If you have a routing loop, you might see evidence of this by watching the route installation process. Two other tools that are handy: traceroute and extended ping. If you use extended ping, set the record route option to see the path the ICMP packets are taking. There is no simple command for hunting down routing loops. The 'simplest' way is to become familiar with the way things _should_ look so you'll notice when things don't look like they should. HTH, John Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=66627&t=66624 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
