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VLAN Missmatch Issues

Hey Cisco Goers. My first post here, thanks for the forums.

 

Going to keep my question brief for now as it is pretty straight forward. Is there a way to gracefully move an IP address on an SVI from one VLAN to another without destroying the IP address?

 

example:

Interface VLAN 100 has IP 192.168.1.254 255.255.255.0 and I want to move that IP to interface VLAN 500. What I dont want to do is 'no ip address 192.168.1.254 255.255.255.0' on VLAN 100 first then 'ip address 192.168.1.254 255.255.255.0' on VLAN 500.

 

Thanks.

1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Blue

Re: VLAN Missmatch Issues

I am not aware of a way to do that unless you use VRFs but I suspect that you don't want to do that. 

 

Other than that you would have to remove it first. 

 

Jon

4 REPLIES
Hall of Fame Super Blue

Re: VLAN Missmatch Issues

I am not aware of a way to do that unless you use VRFs but I suspect that you don't want to do that. 

 

Other than that you would have to remove it first. 

 

Jon

Re: VLAN Missmatch Issues

Not sure how familiar you are with CLI, but it should take an instant if you put the configuration commands in a notepad and just copy and paste them in. For example:

 

!

interface vlan 100

no ip address

!

interface vlan 500

ip address 192.168.1.254 255.255.255.0

!

 

You could also have the reverse commands to put it back at the ready if needed.

Re: VLAN Missmatch Issues

Hi

I agree with Jon, an option is using VRF, now if you want to avoid any impact, I recommend request a maintenance window and do that after business hours and change the VLAN 100 to 500 to the users. 

Super Bronze

Re: VLAN Missmatch Issues

I suspect no matter how you try this, there's likely going to be some brief impact to active traffic using that IP (if that's what you're trying to avoid).

Even the suggestions using VRFs, which would allow both IPs to be active within different routing topologies is likely to be impactful as other hosts try to use the IP if its intended to be globally unique.
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