One more thing to remember about router - id is that they do not have to be routable in the network. In that sense you can use any IP address as the router-id as they are used to just identify the router.
However, as pointed out by Matt, when BGP is used with ospf, they both need to have the same router-id or else you will have BGP synchronizatin problem. On Thu, May 15, 2008 at 2:18 AM, Matt Hill <[EMAIL PROTECTED]> wrote: > Be careful with router-ids. I like to use a real IP on the router. > This way you can be guaranteed it is unique. It matters more for OSPF > than it does for anything else but for consistency's sake I would make > them all real loopbacks on the router. The same loopback too (unless > scenario dictates otherwise). > > Cheers, > Matt > > On 15/05/2008, khalid aljorf <[EMAIL PROTECTED]> wrote: >> Greetings all, >> The Q is that do i have to set the BGP router ID under the BGP process to be >> the same as the interface loopback which is used to establish the >> connectivity >> in "neighbor a.b.c.d update source lo0"?? or it can be any ID like 1.1.1.1 >> or 2.2.2.2 ?? >> >> kindly assist >> >
