[FROG] OSPF not enabled on PPP interface

[Qu Orfeo]

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
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