Unanswered Question
Jul 31st, 2008


I am working on running OSPF over PPPoE, It works fine with DHCP pool with /24 subnet but with negotiation as client is getting /32 ip address its not working because client and server are at different subnets... so what to do to get it resolve?


Devang Patel

I have this problem too.
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Marwan ALshawi Thu, 07/31/2008 - 06:28

u mean u want a client get ip from a dhcp server separated by a router ?

if so

put on the router interface that facing the client the follwoing command

ip dhcp-helper [dhcp server ip addres]

if that not ur requirement post more details

good luck

rate if helpful

devang_etcom Thu, 07/31/2008 - 06:38

I already have IP address assign from DHCP... I want OSPF running between Client and Server when server assign /32 ip address to client.


Devang Patel

sdoremus33 Thu, 07/31/2008 - 06:49

I believe the rule of thiumb is this you cannot adv a /232 from DHCP when the poll is at a /24 net.

lee.reade Thu, 07/31/2008 - 07:18

Hi Devang,

There is no workaround to have client get an ip address via PPP negotiation, it must get it via dhcp, so that you can specify the netmask.

As you have mentioned, the ospf adj;s will not form if you assign via PPP since the subnet masks are different.




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