On downgrade from 9010 and above to 8095, "ve" related interface commands would be removed

[Chandini]

When downgrading the switch from 9010 and above to 8095 “ve” related interface commands and L3 configuration would be removed

Issue noticed:

When the user chooses to downgrade from 9010 version and above to 8095 versions in ICX switches, they will notice that the “ve” commands and layer 3 related configurations within the “ve” are wiped out.

Lab output:

If the switch running 9010 version have the below configuration:

!

interface ve 1

 ip address 1.1.1.1 255.255.255.0

 no spanning-tree

!

interface ve 3

 ip address 2.2.2.1 255.255.255.0

 no spanning-tree

!

interface ve 5

 ip address 3.3.3.1 255.255.255.0

 no spanning-tree

!

When the customer would downgrade from 9010 and above to 8095 versions the configuration would be removed and any configurations included within the ve’s would also be removed.

Reason:

This is an expected behavior. The reason why this is noticed is because on 8095 versions, if we would have to configure “ve ” interface we use command “router-interface ve “ve ID””

Example:

device(config)# vlan 2

device(config-vlan-2)# untag ethernet 1 to 4

device(config-vlan-2)# router-interface ve 2

device(config-vlan-2)# interface ve 2

But from 9010 and above versions the “router-interface ve “ve ID”” command is deprecated and when a “vlan” is created a “ve” with same ID as vlan is also created.

Example:

device(config)# vlan 2

device(config-vlan-2)# interface ve 2

Due to the above changes when you upgrade from 8095 version to 9010 version or above you would not see a problem but when you downgrade from 9010 version and above to 8095 you will notice that since the command “router-interface ve “ve ID”” is not appended to the running configuration the “ve” interface would be completely deleted.

It is recommended to save the configuration as a backup when downgraded from 9010 and above to 8095 and have sufficient downtime to revert back the configurations.

[KennethDelaney]

I've experienced that at a customer site.