08-13-2003 10:52 PM - edited 03-02-2019 09:35 AM
Hello all,
Can anyone tell me why OSPF treats loopback interfaces in it's updates as /32s.
Many thx
Ken
08-14-2003 12:57 AM
Hi,
RFC 2328 says
"
If the state of the interface is Loopback, add a Type 3 link (stub network) as long as this is not an interface to an unnumbered point-to-point network. The Link ID should be set to the IP interface address, the Link Data set to the mask 0xffffffff (indicating a host route), and the cost set to 0.
"
Regards
08-15-2003 05:11 AM
Essentially, because it's a "virtual interface." In fact, with Cisco IOS, you can put the command "ip ospf network-type point-to-point" under the loopback interface, and it will be advertised as with the mask you have configured.
Russ.W
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: