Re: SRX 240 CoS what if I need more than 8 forwarding classes

Hi, 

AFAIK, only 8 queues are possible, however you can have more than 8 forwarding classes [FC] but 1:1 mapping of FC to queue would not be possible.

I believe the requirement can be met using a combination of per vlan policing [rate-limit] and 2 FCs.

Rate-limit to 2Mbps for each VLAN, on breach assign traffic to a lower priority FC.  The default traffic goes through a queue with only tail-drops, while the burst traffic goes through a lower priority queue and more susceptible to QoS drops.

Example:

firewall {
    policer test {
        if-exceeding {
            bandwidth-limit 2m;
            burst-size-limit 2k;
        }
        then forwarding-class POLICE;
    }
}

Cheers,

Ashvin