[j-nsp] QoS limitiations for original FPC

[Blaz Zupan]

I'm trying to interpret this table:

http://www.juniper.net/techpubs/software/junos/junos57/swconfig57-interfaces/html/cos-config2.html#1038128

It lists the hardware limitations of the original FPC. According to the table,
there is a limit of 1 classifier per FPC or PIC. I don't quite understand what
this means.

Does this mean that I can't do this:

class-of-service {
    interfaces {
        so-* {
            unit * {
                classifiers {
                    inet-precedence rule1;
                    exp rule2;
                }
            }
        }
    }
}

>From my understanding of the above web page, this is not possible on the
original FPC. But during my tests, a commit of the above commands succeeded
and also no error was logged to /var/log/messages.

Also, the comments for the mpls-exp classifier say "For M-series original FPC,
the default MPLS EXP classifier is not supported.". In what way is it not
supported?

I would very much appreciate if someone could show me an example configuration
that would not work on the original FPC, but would work on the enhanced FPC.