[zebra 23061] Re: OSPF on Freebsd with aliased interfaces generates NetworkMask mismatch

I did a little more research, and I figured out what Zebra does when you
assign aliases to a loopback.  It redistributes a Stub network into OSPF.
>From another host on the LAN, I do the following

vtysh> show ip ospf database router adv-router 10.0.0.103

   OSPF Router with ID (192.168.0.3)

                Router Link States (Area 0.0.0.3)

  LS age: 1630
  Options: 2
  Flags: 0x0
  LS Type: router-LSA
  Link State ID: 10.0.0.103
  Advertising Router: 10.0.0.103
  LS Seq Number: 80001986
  Checksum: 0x5ed1
  Length: 72
   Number of Links: 1

	Link connected to: Stub Network
	     (Link ID) Net: 10.0.0.107
	     (Link Data) Network Mask: 255.255.255.255
      	Number of TOS metrics: 0
	       TOS 0 Metric: 10


> the view from another host on the lan:
> 
> Vtysh> sh ip route
> Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF,
>        B - BGP, > - selected route, * - FIB route
> 
> O>* 10.0.0.107/32 [110/21] via 10.0.0.103, znb3, 07:01:25
> 
> Just curious, does anyone know what a FIB route is?

I also think I found out what a FIB route.  I believe it refers to a
Forwarding Information Base.  It's similar to a routing table, but indicates
the local interface a router will shunt a packet out on it's way to a
destination (see RFC3222 for more details).


Jim C.