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

[Mike]

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 ?

Mike-