Hi,I have an OSPF network setup - loopback on 1 router is configured with a /24 mask rather than with /32.This network has been added to the OSPF routing table with a /24 mask even though in the OSPF process on the router I have given it a /32 mask. Any idea how I can force the routing process to inject the route into the routing table with a /32 only. Please note that this is just a lab exercise?
The "ip ospf network point-to-point" command under your Loopback interface is what causes the network NOT to be advertised as a host route. If this command is missing, then the network will be advertised as a host route to other routers (default behavior). Only the router with the particular loopback will see the route as a connected /24 (the ways to get rid of connected routes are pretty violent and I think this is not what you want). Isn't the /24 in other routers what you are trying to get rid of? If it is, then you could try to remove the "ip ospf network point-to-point" command by preceeding it with a "no" or try to configure some other ospf network type (such as broadcast or multipoint).
Redistribution of connected subnets will not manage to advertise a /32. The external route that will result from redistribution, will be covering the /24 under the Loopback interface.
p.s. Those labs are very realistic as always. The simplest thing to do in normal life is to have /32 masks on loopbacks :-)
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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