[c-nsp] Possible Stupid Questions Alert - Combining VLAN's

[James MacDonald]

Hi, I didn't read all the replies before posting ... so this could be redundant ... but you can do vlan translation on the ME-3750, ME-6524 or Sup32 even ... and other switches. You simply do a single statement on the trunk port to re-map vlan 100 to vlan 200 for instance ... and away you go.

Here is a link:

http://www.cisco.com/en/US/products/hw/routers/ps368/products_configuration_guide_chapter09186a008069a3d4.html#wp1044990

We use this and the port for port method successfully in our network ... the method is basically determined by our budget at the time :)
 
------------------------------
Jim MacDonald
j4m3sm63 at yahoo.ca
------------------------------

----- Original Message ----
From: Skeeve Stevens <skeeve at skeeve.org>
To: Cisco-nsp <cisco-nsp at puck.nether.net>
Sent: Monday, June 25, 2007 12:23:15 PM
Subject: [c-nsp] Possible Stupid Questions Alert - Combining VLAN's


As I said - Possible Stupid Question Alert ;-)

What I want to do I think is valid, so please keep flames on low!

I want to literally be able to change a VLAN's number in a path of switches.

For example: in a peering point we have half a dozen ISP's sharing a central
switch for some private peering.

All connections are Trunks so the different ISP's can patch dot1q VLAN's to
each other in whatever way they like.

The issue is with conflicting VLAN numbers in the switch chain (involving
3750G, 3550, 3560G, 3524XL) and the trunks to the ISP's themselves.

So, when there is a conflict, I'd essentially like to 'renumber' the VLAN
and then pass it off up the chain so their isn't a conflict in the path.

Ideally.

ISP - uses 100
Sends up trunk into shared switch
Switch turns vlan 100 into vlan 650 and then sends out link to upstream
switch and it is forever 650.

Or something like that.

I realise I could just burn 2 ports and put a x-over cable between them, but
it seems such a waste.

It would also be done on a router, but we don't have that kit available.

I'm ready for useful comments and a share of ridicule.

For those with a massive amount of money who can buy anything their like and
may respond 'just by a 6509', please remember that not all of us have
massive amounts of unlimited funding to $100k on a 10G interface for a GSR
when 100k might be out yearly budget! ;-)

.Skeeve


 
--
Skeeve Stevens, RHCE
skeeve at skeeve.org / www.skeeve.org
Cell +61 (0)414 753 383 / skype://skeeve

eintellego - skeeve at eintellego.net - www.eintellego.net 
--
I'm a groove licked love child king of the verse 
Si vis pacem, para bellum


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