[j-nsp] Problems with OSPF stub area (Juniper and Cisco)

Matti Saarinen mjs@cc.tut.fi
05 Nov 2002 09:06:13 +0200


I'm having problems with configuring an OSPF stub area where ABR is
Juniper (JUNOS 5.4.R2.4) and inside the area there is a Cisco router.
The routers are connected to each other over an ATM PVC.

Currently, I have the following configuration in Juniper:

interfaces {
    at-0/0/0 {
        unit 206 {
            encapsulation atm-snap;
            vci 0.206;
            family inet {

protocols {
    ospf {
        area {
            stub default-metric 10 no-summaries;
            interface at-0/0/0.206;

I've no access to the Cisco router on the other end of the link. Yet,
I think its configuration is more or less in order because when I had
a Cisco router in place of the Juniper there were no problems. In
Cisco, the following configuration did work:

interface ATM8/0/0.6 point-to-point
 ip address
 ip verify unicast reverse-path
 no ip directed-broadcast
 ip pim sparse-dense-mode
 ip ospf network broadcast
 atm pvc 206 0 206 aal5snap inarp
 no atm enable-ilmi-trap
router ospf 1739
 area stub no-summary
 area range
 network area
 network area

While looking through the ospf trace in Juniper I don't see anything
about the network Only the /30 in p2p link shows up.
The adjacency between Juniper and Cisco becomes full and in the area
database I can see the routes. Still, they never appear in the
forwarding table.

So, if anyone can give me any hints what to do or what I do wrong,
I'll appreciate it.


Matti Saarinen, Tampere University of Technology / Network Administration
Phone:	+358 3 3115 3337 # Address:	P.O. Box 692
Fax:	+358 3 3115 2172 #		FIN-33101 Tampere
Email:	mjs@cc.tut.fi	 #		Finland