[c-nsp] asr 920 - lower mpls mtu?

Adam Vitkovsky Adam.Vitkovsky at gamma.co.uk
Mon Jun 20 03:10:43 EDT 2016

> Mike
> Sent: Saturday, June 18, 2016 5:56 PM
> With all this talk of asr920, and having a new one in my trembling hands, I
> have been working on learning it and have run into an unanticipated
> problem. Trying to set up an EoMPLS tunnel, the mtu allowed for 'l2 vfi
> somename manual' is a bit short.. only 9180 bytes as opposed to 9216 for all
> the rest of my me3600's for example.
> asr920(config-vfi)#mtu ?
>    <1500-9180>  MTU size in bytes
>    <cr>
> I am trying to figure out why this is... am I being silly and this is too high and I
> should select a lower global default like 9100 or ?
Yes, use max MTU that the platform supports on core links and on edge links use 9100.
9100 should be enough in CsC scenarios where final end customers need to transport Junbo frames.


        Adam Vitkovsky
        IP Engineer

T:      0333 006 5936
E:      Adam.Vitkovsky at gamma.co.uk
W:      www.gamma.co.uk

This is an email from Gamma Telecom Ltd, trading as “Gamma”. The contents of this email are confidential to the ordinary user of the email address to which it was addressed. This email is not intended to create any legal relationship. No one else may place any reliance upon it, or copy or forward all or any of it in any form (unless otherwise notified). If you receive this email in error, please accept our apologies, we would be obliged if you would telephone our postmaster on +44 (0) 808 178 9652 or email postmaster at gamma.co.uk

Gamma Telecom Limited, a company incorporated in England and Wales, with limited liability, with registered number 04340834, and whose registered office is at 5 Fleet Place London EC4M 7RD and whose principal place of business is at Kings House, Kings Road West, Newbury, Berkshire, RG14 5BY.
 This email has been scanned for email related threats and delivered safely by Mimecast.
 For more information please visit http://www.mimecast.com

More information about the cisco-nsp mailing list