VLANs Translation

[alialjamri2008]

Can we do translate vlans like: (vlan 50, 60, 70) on switch A, to (vlans 5, 6, 7)  on switch B with trunk port connecting each other.

Thanks,

Ali               

[glen.grant]

  If you mean vlans 50,60,70 with a certain subnet and the same subnets on a different switch with different  vlan numbers then the answer is no ,  there is no way to trunk them if they are using different vlan numbers.

[alialjamri2008]

Let me explain our case; we have a mobile site that connects to our base station through (trunk) wireless multi direction antenna, and we have four base stations each with its own routed vlan's setup.

What we are doing currently is to reconfigure the mobile switch whenever this site move to a location close to one of our base stations, and I am thinking for a way to automate this by translation or any other ways.

Thanks,

Ali

[Karsten Iwen]

The Metro-Ethernet-Switches like the ME3400 are capable of VLAN Translations (it's named vlan mapping there):

http://www.cisco.com/en/US/partner/docs/switches/metro/me3400e/software/release/12.2_58_ex/configuration/guide/swtunnel.html#wp1059479

But I'm not aware of this feature in regular switches.

You could implement it "the really dirty way". For that to work you need a switch with per-VLAN-MAC-Address-Tables:

int gig 1/0/1

description TRUNK TO VLAN-DOMAIN-5,6,7

switchport mode trunk

switchport trunk allowed add 5-7

int gig 1/0/2

description TRUNK TO VLAN-DOMAIN-50,60,70

switchport mode trunk

switchport trunk allowed add 50,60,70

!

int gig 1/0/11

desciption CABLE TO gig 1/0/12

switchport mode access

switchport access vlan 5

no cdp enable

int gig 1/0/12

desciption CABLE TO gig 1/0/11

switchport mode access

switchport access vlan 50

no cdp enable

!

int gig 1/0/13

desciption CABLE TO gig 1/0/14

switchport mode access

switchport access vlan 6

no cdp enable

int gig 1/0/14

desciption CABLE TO gig 1/0/13

switchport mode access

switchport access vlan 60

no cdp enable

!

int gig 1/0/15

desciption CABLE TO gig 1/0/16

switchport mode access

switchport access vlan 7

no cdp enable

int gig 1/0/16

desciption CABLE TO gig 1/0/15

switchport mode access

switchport access vlan 70

no cdp enable