How do people allocate addresses for the loopback interfaces of their
routers?
Obviously loopback interfaces are a Good Thing for OSPF and BGP stability.
What scheme do people us to allocate them?
My situation is I am bringing up a new datacenter with a limited address
space. I dont want to subnet its /24 to assign loopbacks from that. I
think using RFC1918 addresses would be a bad thing (does the router ID
address need to be reachable from the BGP peer? In any event, it could
lead to rotuer ID collision if another customer of the upstream uses
same RFC1918 address.)
I dont think using an address from some other space I have in another
datacenter is a good idea - the BGP announcements for that address would
originate on the other side of the country. Does that matter? It also
makes agreggation impossible for that range... Is that my best solution?
Or am I missing something obvious?
TIA
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