PPPOE ISP - Multiple static IP addresses

Unanswered Question
Apr 8th, 2010

We have a router who's ISP is PPPOE, we have 1 static IP address from the ISP already. We now need 2 static IP addresses, and the ISP has now provided them to us.

their Dialer interface is currently set with "ip address negotiated" and we get the original static IP address fine from the ISP.

My question is, to assign both static IP's to the Dialer interface, would i have to do "ip address x.x.x.x" and "ip address y.y.y.y secondary".

Or is there a way to get multiple static IP's via pppoe using the ip address negotiated?

I have this problem too.
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cisco-cdn Thu, 04/08/2010 - 11:05

For the new secondary static IP we plan on doing a 1-1 NAT to an internal IP.

For the current (primary) static IP, thats their main IP for some port forwards, and outbound NAT/PAT.

Paolo Bevilacqua Thu, 04/08/2010 - 11:11

You do not need to associate the address to the interface.

Just use it directly in the nat static command.

cisco-cdn Thu, 04/08/2010 - 12:12

hmmm I did try that earlier and that did not work. I will have to look into this further.

cisco-cdn Thu, 04/08/2010 - 12:32

With the NAT, a loopback and the second static IP specified as secondary address on the Dialer interface it still would not work.

Traceroutes indicate the second static gets to a certain point at the ISP and gets no further. Its as if the ISP hasn't assigned this IP to me, gonna have to call them.

Paolo Bevilacqua Thu, 04/08/2010 - 12:35

Its as if the ISP hasn't assigned this IP to me

Yes, otherwise would have been working as indicated above.

Possibly you need to flap the interface to trigger the assignment.

KWillacey_2 Tue, 04/26/2011 - 09:12

Hi Paolo,

Can you help, I am not familiar with PPPoE. I have a new PPPoE circuit and the ISP has provided a static IP address, can I configure this on the dialer interface or do I leave it as "ip address negotiated"? Your help would be greatly appreciated.


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