Hi,

I’m trying to run FRR v8.4 under ubuntu16, configure OSPF on PPP/L2TP interface.

After configuring xl2tpd/pppd under ubuntu, I’ve set up a pair of ppp0 interface.

On the machine acting as LAC, the IP address of PPP0 is 172.16.0.1 and its peer is 172.17.0.1.

Ifconfig shows:

============

Ppp0

Link encap: point-to-point protocol

Inet addr:172.16.0.1  P-t-P:172.17.0.1   Mask:255.255.255.255

UP  POINTTOPOINT  RUNNING  NOARP  MULTICAST    MTU:1500   Metric:1

============

And I can ping 172.17.0.1 from 172.16.0.1.

But when I configure OSPFD as below, no OSPF packet is sent through the ppp0 interface:

================================

hostname ospf

password zebra

enable password zebra

!

interface ppp0

ip ospf network point-to-point

!

interface lo

ip ospf passive

ip ospf passive 192.168.40.2

exit

!

!

router ospf

ospf router-id 192.168.40.2

network 192.168.40.2/32 area 0.0.0.0

network 172.16.0.1/32 area 0.0.0.0

exit

!

!

=======================================

“Show ip ospf interface ppp0” says “OPSF not enable on this interface”.

Could anybody kindly help me to find out what I’m missing?

Thanks a lot,

Orfeo