[j-nsp] MTU on switch interfaces

[Victor Sudakov]

Mark Tinka wrote:
> >
> > The MTU on EX4200 ports in port-mode access is 1514 bytes. Shouldn't
> > it become 1518 bytes when the port is reconfigured in port-mode trunk ?
> 
> You can set the interface MTU on the EX4200 to whatever you want; up to
> 9,192 bytes.
> 

Yes, I can, manually. But why does it not change from 1514 from 1518
automatically when I reconfigure the interface from access to 802.1q
trunk mode?

> >
> > And if I want to configure the MTU on an EX4200 to match MTU=2000 on a
> > Cisco Catalyst, what would be the correct value? 2014? 2018?
> 
> +14 bytes on the Juniper for whatever you have running on IOS and IOS XE.

Why +14 bytes and not +18 bytes if it's a 802.1q trunk?

-- 
Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
sip:sudakov at sibptus.tomsk.ru