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Hi Pual,
The interface is gre tunnel, I print inet_ntoa (DR (oi)), but I saw 0.0.0.0.

=============================================================
gretunnel is up
ifindex 13, MTU 1476 bytes, BW 0 Kbit <UP,POINTOPOINT,RUNNING,NOARP>
Internet Address 192.168.3.1/24, Area 0.0.0.0
MTU mismatch detection:enabled
Router ID 192.168.4.54, Network Type POINTOPOINT, Cost: 10
Transmit Delay is 1 sec, State Point-To-Point, Priority 1
No designated router on this network
No backup designated router on this network
Multicast group memberships: OSPFAllRouters
Timer intervals configured, Hello 10s, Dead 40s, Wait 40s, Retransmit 5
Hello due in 2.224s
Neighbor Count is 1, Adjacent neighbor count is 1
==============================================================

If the network type is POINTOPOINT to cause Designated Router is 0.0.0.0?
How can I do to let it can work and packet with Designated Router IP.

Thanks

2017-03-23 17:34 GMT+08:00 Paul Jakma <paul@jakma.org>:

> On Thu, 23 Mar 2017, ??? wrote:
>
> Hi all,
>> I want to know why ospf hello packet without Designated Router and Backup
>> Designated Router?
>>
>
> These are elected on broadcast links, after the exchange of a few packets.
> What is the issue you're seeing?
>
> If adjacencies are not forming, double-check your network configuration -
> firewalling particularly. If you've written or modified the network driver,
> check multicast is working correctly up to user-space.
>
> regards,
> --
> Paul Jakma | paul@jakma.org | @pjakma | Key ID: 0xD86BF79464A2FF6A
> Fortune:
> Why are there always boycotts? Shouldn't there be girlcotts too?
> -- argon on #Linux