[c-nsp] OSPF over virtual-access interfaces
Jeremiah Millay
jeremiah at rockriver.net
Tue Aug 15 17:23:10 EDT 2006
I'm trying to set up a customer router to run ospf over their ADSL line
to us. Here is a crude diagram:
Customer Router (Fa0/0) -----> ADSL Modem (PPPoE Client) -----> Provider
Cloud -----> LNS (One of our core routers)
I enable all of the commands on the customer router for a standard ospf
setup. Something like:
router ospf 1
log-adjacency-changes
passive-interface default
no passive-interface FastEthernet0/0
network 209.X.X.0 0.0.0.7 area 0
On our side (the LNS):
router ospf 1
log-adjacency-changes
passive-interface default
no passive-interface Virtual-Template1
network 209.X.X.0 0.0.0.7 area 0
interface Virtual-Template1
mtu 1492
ip unnumbered Loopback1
no logging event link-status
peer default ip address pool DSL-POOL
ppp authentication chap
!
int loopback 2
ip address 209.X.X.1 255.255.255.248
In my RADIUS config I'm returning some specific Cisco AVPairs:
Framed-Address = 209.X.X.2
Framed-Netmask= 255.255.255.248
lcp:interface-config#1=ip unnumbered loopback 2
lcp:interface-config#2=ip ospf authentication-key somekey
I'm able to get the connection working just fine. I can ping from both
ends with no problems. But I'm not seeing any hellos from the either
router crossing the link (debug ip ospf hello / debug ip ospf adj). Is
there some trick to creating an OSPF adjacency over virtual-access
interfaces? Havn't found much info on the Cisco site.
Any help would be appreciated.
Jeremiah
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