Dynamic IP Address Release/Renew

When I ask this question, I am refering to a Cisco 831 router
that is taking a dynamic IP address from the cablemodem provider.

In Windows 2000, you can type 'ipconfig /release' to release
the dynamic IP address assigned to the PC and then type 'ipconfig
/renew' to get another dynamic IP address assigned.

Is/are there IOS command(s) to release and renew the dynamic
IP address from the cable provider? If so what is/are it/they?

I know that you can just reload the router to do it, but I
want to be able to do it without taking the router down.

Thanks,


Fred

Fred Atkinson

On Wed, 05 May 2004 11:00:56 +0000, Fred Atkinson wrote:

> Is/are there IOS command(s) to release and renew the dynamic
> IP address from the cable provider? If so what is/are it/they?
>
> I know that you can just reload the router to do it, but I
> want to be able to do it without taking the router down.
>

If you have IOS 12.3(4)T or later there is release/renew dhcp exec
command.

See
http://www.cisco.com/univercd/cc/td/...4/gtdhcprr.htm

For earlier IOS, you don't need to reload. Just shut/no shut the
interface.

--
Rgds,
Martin

Martin Gallagher wrote:

> On Wed, 05 May 2004 11:00:56 +0000, Fred Atkinson wrote:
>
>
>> Is/are there IOS command(s) to release and renew the dynamic
>>IP address from the cable provider? If so what is/are it/they?
>>
>> I know that you can just reload the router to do it, but I
>>want to be able to do it without taking the router down.
>>
>
>
> If you have IOS 12.3(4)T or later there is release/renew dhcp exec
> command.
>
> See
> http://www.cisco.com/univercd/cc/td/...4/gtdhcprr.htm
>
> For earlier IOS, you don't need to reload. Just shut/no shut the
> interface.
>

This works only for DHCP which is not the only way to assign a dynamic
IP address to an interface.

Thanks,

My IOS is 12.2 ;-(, but I'll remember the shut/no shut trick.

I got my 831 through the Cisco academy program a few months
ago. I'm looking in to finding out if I can get the upgrade.

My best,


Fred

On Thu, 06 May 2004 01:11:37 +1000, "Martin Gallagher"
<> wrote:

>On Wed, 05 May 2004 11:00:56 +0000, Fred Atkinson wrote:
>
>> Is/are there IOS command(s) to release and renew the dynamic
>> IP address from the cable provider? If so what is/are it/they?
>>
>> I know that you can just reload the router to do it, but I
>> want to be able to do it without taking the router down.
>>
>
> If you have IOS 12.3(4)T or later there is release/renew dhcp exec
>command.
>
> See
>http://www.cisco.com/univercd/cc/td/...4/gtdhcprr.htm
>
> For earlier IOS, you don't need to reload. Just shut/no shut the
>interface.

Fred Atkinson <> wrote in message news:<>. ..
> Thanks,
>
> My IOS is 12.2 ;-(, but I'll remember the shut/no shut trick.

Perhaps

clear int

would do the job? Even less typing!