Alternatively, you can use the 'router-id x.x.x.x' command to force a router ID
http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/113ed_cr/n p1_r/1rospf.htm#xtocid2457225 Though I find it easier to use a single loopback for the OSPF process. > Robert, > > If your trying to find out what the RID will be on that box, try doing a "sh > ip ospf" and it should tell you. That aside. In your config, since you > don't have any loopbacks (as you stated you know those ip's will be selected > first as the RID) it'll take the highest ip of active interfaces (whether or > not they're in the ospf domain). So in your example, it'll start at the > first octet and choose the highest. That being 193.221.200.1 > > I think it's safe to make up a little list. > > 1) Highest IP of any loopback on the box > 2) highest ip of any interface (in ospf or not) > > Tim > > > > -----Original Message----- > > From: Thompson, Robert D [SMTP:[EMAIL PROTECTED]] > > Sent: Wednesday, October 24, 2001 6:50 AM > > To: [EMAIL PROTECTED] > > Subject: OSPF Router ID and IP Addresses [7:24003] > > > > Hi All, > > > > Can anybody clear something up for me. > > > > In OSPF when selecting the Router ID, what Interface will OSPF choose as > > the > > Router ID on this particular router. For example > > > > Interface Ethernet 0 > > IP address 10.1.1.1 255.0.0.0 > > > > Interface Ethernet 1 > > IP address 172.16.100.1 255.255.0.0 > > > > Interface Ethernet 2 > > IP address 193.221.200.1 255.255.255.0 > > > > rest of config not listed for this discussion and IP address structure > > made > > up for the discussion > > > > > > (in this case I won't use a loopback interface, purely to discuss Router > > ID > > and IP address considerations) > > > > I understand its the highest IP address that will win, in this case will > > it > > be 10.1.1.1? or will it be 193.221.200.1 > > > > I will appreciate any comments > > > > Cheers > > > > Rob Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=24010&t=24003 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
