Problem with adding secondry vlan interface on extreme C5G124-24P2 - Could not set the interface network.

[JP_Pieterse]

Hi all,

I am trying to set a secondary interface IP on VLAN 1. Due to business changes I needs to move away from their Class C network to a class B network. I am adding a secondry IP to be able to route between old and new network.

Here is what happens:
DetNet_Router(su)->router
DetNet_Router(su)->router>enable
DetNet_Router(su)->router#configure
Enter configuration commands:
DetNet_Router(su)->router(Config)#interface vlan 1
DetNet_Router(su)->router(Config-if(Vlan 1))#ip address 172.20.0.1 255.255.0.0 secondary
Could not set the interface network.

The primary interface on this vlan is 192.168.0.1 255.255.240.0

What am I doing wrong?

Thank you in advance.

[JP_Pieterse]

I figured the same thing out. I manged to add 172.20.0.2.

I however cant find where 172.20.0.1 resides. Is there a command that I can run to find it?

Thanks for the reply