[nsp] OSPF over RBE - no full adjacency

[Vincent De Keyzer]

Ok, I had two problems: MTU (had to change it to 1500 in order to get
full adjacency) and network-type (had to change it to remove discrepancy
in the OSPF DB and get the OSPF routes into the routing table).

So now RouterA looks like this:

interface ATM2/0.12801 point-to-point
 description To Router B 
 ip address x.y.240.81 255.255.255.252
 ip verify unicast reverse-path
 ip mtu 1500
 ip ospf network broadcast
 atm route-bridged ip
 pvc miguel 12/801
  vbr-nrt 2000 2000
  encapsulation aal5snap
 !
 ntp broadcast
end

Now two questions are left:
1) What is the difference between "mtu 1500" and "ip mtu 1500"?
2) I had to change the ATM side to "broadcast". Could I also have
changed Ethernet side to "Point-to-point"?

Vincent



> -----Original Message-----
> From: jgh_cisco [mailto:jgh_cisco at idcomnet.no] 
> Sent: mercredi 21 janvier 2004 21:24
> To: 'Vincent De Keyzer'; cisco-nsp at puck.nether.net
> Subject: SV: [nsp] OSPF over RBE - no full adjacency
> 
> 
> Hello !
> 
> You have an IP MTU issue.
> OSPF checks the MTU before building the adjacency.
> ATM defaults to 4470 bytes, and Ethernet 1500.
> 
> Try adding "ip mtu 1500" under your ATM subinterface.
> 
> You should get a descriptive debug message if you do "debug 
> ip ospf adj"
> 
> Jan G. Hope
> 
> > Hello people,
> > 
> > how do I make the following two boxes establish an OSPF adjacency?
> > 
> > It seems that simple network statements are not enough - neighbors 
> > remain in Exstart/Exchange phase.
> > 
> > Vincent
> > 
> > 
> > Router A:
> > 
> > interface ATM2/0.12801 point-to-point
> > 
> > Router B:
> > 
> > interface Ethernet0/0
> 
>