What is the impact in the running systems when we take out or remove VRF?

[angeling]

Hi,

Please advise recommended steps to remove VRF with a number of VLANs on it.

Please advise what we should expect? network disruption? for how long?

thanks.

[Steven Williams]

Remove the VRF and it removes all interfaces that are set for that VRF. 

Switch(config)#no ip vrf RED
% IPv4 addresses from all interfaces in VRF RED have been removed

Vlans are not tied to a VRF per say, but that vlan will stay in place in the vlan database and be associated with any ports it was previously, by obviously if the vlan belongs to the interface you just cleared due to removing the VRF those devices attached to that port on that vlan will not be about route out of their local broadcast domain. 

[angeling]

Hi Steven,

What is the right approach.

We have 2 core switch (redundant network environment).

For load balance, the VLANs were distributed between this 2 core switches.

Our plan:

Remove VRF in CORE1

1. first move active VLANs in CORE1 to CORE2

2. remove VRF in CORE1; reconfigure

3. one at a time, move VLANs from CORE2 to CORE1; test network connectivity

4. remove VRF in CORE2; reconfigure

5. load balance. move some VLANs to CORE1

Is this steps correct? Are we missing any?

Appreciate your reply, thanks.

Rgds

angeling

[Julio E. Moisa]

Hi

As I remember It can remove the IP addressing and VRF configuration under interfaces (Including Interface VLAN - SVI). And Yes network disrupting for the networks into a VRF.