Hi Nick, If you have a looopback configured it would take precedence over any physical interface. Regardless of the IPs. ie if you have an ethernet interface which is 223..255.255.254 and a loopback which is 1.0.0.1 and no router-id configured under the ospf process then the router-id would 1.0.0.1 once the ospf process starts.
Cheers, Matt 2009/10/25 nicholas golden <[email protected]> > I have a question about OSPF Router ID. > > I know how to change it in all forms, but the question I have is after I > change it and I do a "Clear ip ospf process" and type yes and then do a show > ip ospf, it still shows the old router id. For example I put 200.200.200.1 > on a S1/1 interface, so I changed it to 1.1.1.1 to represent router 1. After > I did a clear ip ospf pro, typed yes it still was 200.200.200.1. It wasn't > until a reload of the router that it went back. This only happens on one of > my 3640's but not all of them. > > Anyone run into this in the lab, on a 2811, 3825 or anything else - seems > odd to me as it works on other routers with the same IOS code? > > -Nick > > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > >
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