[c-nsp] Jumbo frames, MPLS, and Metro Ethernet

[Michael Smith]

Hello Kasturi:

We saw this behavior on the 4507 with the 18-port Gig card.  There is a
6-port Gig card that supports true Jumbo frames across all ports.  I think
you may see the same issues on cards that use a
shared-backplane/over-subscribed backplane.

Mike


On 3/24/05 1:09 AM, "Novice" <vkasturi at gmail.com> wrote:

> Hi Mike,
> 
> When u write - We've run into issues where we *thought* jumbos were
> supported then come to find out it's only on the first 3 out of 18
> ports >>>> can u confirm which hardware device is this ?? We are
> seeing some similiar issues.
> 
> Thanks,
> Kasturi.
> 
> 
> On Thu, 17 Feb 2005 13:23:04 -0800, Michael Smith <mksmith at noanet.net> wrote:
>> On 2/16/05 1:33 PM, "Greg Schwimer" <gschwimer at godaddy.com> wrote:
>> 
>>> Heh... of course it's that easy!  I was wondering what experiences
>>> others might have had with allowing jumbo frames in an MPLS network that
>>> provides internet transit services to its connected edge nets.  Are
>>> there any "gotchas" to consider?
>>> 
>> The biggest issue I've found is not whether or not to transport, but what
>> specific ports on what specific cards on what specific devices will support
>> jumbo frames.  We've run into issues where we *thought* jumbos were
>> supported then come to find out it's only on the first 3 out of 18 ports.
>> 
>> Be sure to confirm beyond a shadow of a doubt that the frame-size you're
>> looking for is supported on the hardware you have/plan to purchase.
>> 
>> Mike
>> --
>> Michael K. Smith
>> 206-219-7116 (work)     866-662-6380 (NOC)
>> NoaNet                  http://www.noanet.net
>> 
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>