[j-nsp] Counter on subinterface on EX

[Tore Anderson]

* Raphael Mazelier <raph at futomaki.net>

> I've just realized there is another pretting annoying problem with EX 
> series. It seems that is was not possible to count passing in 
> subinterface (or vlan interface) on EX.

It's quite annoying indeed.

> I wonder if someone ever faced this problem, and if there is some king 
> of workarround. The goal is to monitoring traffic, and billing.

The way I do it is to create input and output firewall filters for each
configured family on the interface with a single term, which just does
"count" and "accept". Then I poll those firewall counters.

Tore