[c-nsp] Renumbering serial interfaces

[Steve Bertrand]

On 2010.02.18 08:56, Jon Lewis wrote:
> On Thu, 18 Feb 2010, Steve Bertrand wrote:
> 
>>> I.e.
>>> interface ATM0/0.32 point-to-point
>>> Ip add 2.2.2.2 255.255.255.252 secondary
>>>
>>> Telnet/ssh to this address using source address 2.2.2.1
>>> Then no ip add 1.1.1.1 255.255.255.252
>>> The 2.2.2.2 address becomes the priamry and you should not loose the
>>> management session.
>>
>> Does this work differently on a serial interface? On an fa int:
>>
>> route-server1(config)#int lo75
>> route-server1(config-if)#ip address 208.70.109.155 255.255.255.255
>> route-server1(config-if)#ip address 208.70.109.156 255.255.255.255 sec
>> route-server1(config-if)#no ip address 208.70.109.155 255.255.255.255
>>
>> Must delete secondary before deleting primary
> 
> Instead of removing the primary IP of the interface, try just changing
> it. It'll let you do that.  I've seen people break things by doing that
> by accident when they meant to add another secondary address.

I suppose that considering that this is a PtP link, the OP could apply
an IPv6 address to each end, verify reachability, and temporarily remove
all v4 addresses and still maintain a connection until the work is
complete :)

...I'd still use the "reload in..." just to be safe though.

Steve