This issue has nothing to do with what mask is used in the network statement and changing the mask will have no effect on what is advertised.
The key to this issue is the mention that the interface is a loopback interface. OSPF will advertise a loopback interface as a /32 and consider it a stub host no matter what mask is configured on the interface and no matter what mask is used in the network statement. (check this with the output of show ip ospf interface) The solution to this is to configure on the loopback interface ip ospf network point-to-point. If you do this then OSPF will advertise the subnet with the configured mask.
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...