Him
On Fri, 30 Sep 2011, chris stand wrote:
Are many ( any ) of you using vlan translation on trunk ports ?
Legacy networks integrating into new number schemas ?
Allowing similar vlans to live at multiple remote locations but be
seen uniquely at "core"
Part of an 802.1X / radius auth vlan scheme ?
yes used it on a pair of 6504 for a similar use case to allow all access
switches of a service provider to have an identical vlan numbering scheme.
interface GigabitEthernet9/8/7
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 501,511,521,531
switchport mode trunk
switchport nonegotiate
switchport vlan mapping enable
switchport vlan mapping 500 501
switchport vlan mapping 510 511
switchport vlan mapping 520 521
switchport vlan mapping 530 531
spanning-tree portfast edge trunk
!
The catch is that that you can only have one mapping per port group on a line
card.
In our case with an WS-X6724-SFP this translates to 2 groups of ports 1-12 and
13-24.
So if you have lots of remote sites you will have difficulties getting enough
unique mappings.
We are considering using service instances in our distribution layer to do away
with the vlans in core and distribtution.
Greetings
Christian
6500 or 7K ?
Thank you,
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