[nsp] More QoS questions

[Stephen Sprunk]

Thus spake <francisv@dagupan.com>
> I'm trying configuring a Cisco 3640 router for QoS. I want to tag incoming
> packets on the ingress interface (Ethernet 0/0) with DSCP values and then
> processing those values on the egress interface (Serial 0/0). Here's my
> configuration:
>
> class-map match-all DSCP-1
>   match ip dscp 1
> class-map match-all DSCP-3
>   match ip dscp 3
> class-map match-all DSCP-2
>   match ip dscp 2

DSCP's 1, 2, and 3?  I'd recommend using AF11 (9), AF12 (10), and AF13 (11) for
this type of use.

>   class DSCP-2
>     priority 256

You realize "priority 256" is a *maximum* value, not a minimum, right?  If you
want to guarantee a minimum bw (which I figure is what you want), use "bandwidth
256".

> policy-map DEFAULT-INCOMING
>   class class-default
>    service-policy TAG-PACKETS
> policy-map DEFAULT-OUTGOING
>   class class-default
>    service-policy LIMIT-TRAFFIC

No offense, but this is loony.  Why are you attaching one policy to another
policy?  Yes, the CLI will accept it, but that doesn't mean it's a good idea.

> But attaching DEFAULT-INCOMING or DEFAULT-OUTGOING to an
> interface doesn't work! Doing a 'show running-config' doesn't show the
> service-policy on the interface.

In your config, you don't show trying to attach it to an interface.

interface Ethernet0/0
 service-policy input TAG-PACKETS
!
interface Serial0/0
 service-policy output LIMIT-TRAFFIC

S