We are working on separating instance and provider traffic as much as possible in T184209 and need eth2 for both of these hosts in the labs-instance-transport1-b-codfw VLAN (not created yet). The other alternative would be to use a subinterface on eth1 to allow the VLAN but the usage of eth1 in eqiad means it would unwise so let's do the same here.
I will create the VLAN and configure switchports if @Papaul can do the physical connecting :)