[AusNOG] quick cumulus question

[Alex Samad]

Hi

on routeros you can set the l2 mtu and the l3 mtu
I have one of these connected to a cumulus switch.

I am tryng to configure every thing though the /etc/network/interfaces file.

I have setup a LACP with MLAG so cc1036 SFP1 -> SW1 SFP2 -> SW2

I have

auto lacp-rtr2
iface lacp-rtr2
  bond-slaves swp17
  #mtu 9216
  mtu 9000
  clag-id 2
  mstpctl-portadminedge yes
  mstpctl-portbpdufilter yes
  #mstpctl-bpduguard yes

corrosponding to
/interface bonding
add mode=802.3ad mtu=9000 name=ybosw3 slaves=sfp-plus1,sfp-plus2
transmit-hash-policy=layer-2-and-3


am I right in thinking that iface lacp-rtr2 is the l3 device and
setting mtu here is the l3 mtu.  if so how do I set the l2 mtu ???

A