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IOS FW: DHCP and secondary ip?

I have an IOS firewall on a 1721-router runnning the latest advanced-security image for testing.

Would it be possible to have DHCP as well as a secondary static ip on the one and same outside interface?

Not a big issue but I thought that I'd better ask.

The ADSL modem (that bridges the traffic) has a management interface on a specific ip subnet that differs from the DHCP assigned one.

I tried, but the secondary never appears in the running config. Altho it's in the arp-cache after entering the ip address .. secondary-command. (as well as ip/mac of the managemnt interface of the modem) but I cant seem to connect.

2 REPLIES
Cisco Employee

Re: IOS FW: DHCP and secondary ip?

Hi,

If u mean, you want to assign DHCP address to the interface as primary, and assign another address as secondary, I dont think it is possible!

Thanks

Nadeem

New Member

Re: IOS FW: DHCP and secondary ip?

Yes, that was exactly what I wanted.

I dont think it's possible either, but worth a chance to ask here :D

Thanks for the reply.

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