I'm kinda wondering why the MTU i set so low in ever instance? Is there some sort of hardware constraint to setting it to maximum 9216 ? If there isn't what is the harm ? You enable jumbo-frames and faster transfer rates over longer distances if people buy this service from you.<div>
<br></div><div>Tag type dosen't matter imho. Just a way for you to diffrentiate the service. The switch should to my knowledge support 88a8 over 88a8 or 8100 or 8100.</div><div>// Andreas<br><br><div class="gmail_quote">
On Fri, Jun 25, 2010 at 1:06 AM, Eric Helm <span dir="ltr"><<a href="mailto:helmwork@ruraltel.net">helmwork@ruraltel.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div><div></div><div class="h5"><br>
<br>
On 6/24/2010 1:42 PM, Grady Neely wrote:<br>
> Hi,<br>
><br>
> I would like to send many Q-in-Q VLANS across a VPLS instance. I really do not care what the tags are, I essentially want a transparent service, that preserves the same tags from ingress on the egress ports of the VPLS instance.<br>
><br>
> What is the best way to do this?<br>
><br>
> Should I set the tag-type on the VPLS instance to 9100 (the CE traffic is using 8100 for both tags) and set the port to untagged in the VPLS?<br>
><br>
> Is this how to carry multiple VLANS across implicitly in a MLX?<br>
><br>
> Does this work for double and single tagged traffic?<br>
><br>
> What about untagged traffic?<br>
><br>
> What should the VC mode be set to, raw or tagged?<br>
><br>
> Thank you!<br>
><br>
<br>
</div></div>I'd use 88A8 as the tag-type per 802.1ad and MEF standards.<br>
<br>
Here is a config that works for me:<br>
<br>
tag-type 88a8 ethe 3/18<br>
<br>
router mpls<br>
vpls Q-in-Q 100<br>
vpls-mtu 2000<br>
vlan 100<br>
untagged ethe 3/18<br>
<br>
This allows for proper Q-in-Q with the default VC mode of raw.<br>
In my case raw mode seems to fit fine, but I'm not too clear on when to<br>
use tagged mode.<br>
<br>
Perhaps someone can explain better when to use tagged mode vs. raw mode.<br>
<br>
/Eric<br>
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</blockquote></div><br></div>