[c-nsp] QOS Help

[Denis V. Schapov]

> >> Correct, in general you need to use a hierarchical policy (as mentioned
> >> in http://www.cisco.com/warp/public/121/where_policy.html) where you
> >> shape in the parent and do CBWFQ in the child policy.
> >
> >    Yet again, on some platforms, you end up seeing that hierarchical CBWFQ
> > is not supported on ATM PVC's (7200 + PA-A3-OC3xxx).
> >
> >
> > Marko.
> >
>
> any chance it's because of certain IOS version? seems ok here..
> 7206VXR
> FRU Part Number:  PA-A3-OC3MM=
> 12.2(25)S
>
> policy-map test123
>   class 234
>    shape average 512000
>   class class-default
>    fair-queue
>
> interface ATM2/0.8 point-to-point
>  ip address x.x.x.x 255.255.255.252
>  no atm enable-ilmi-trap
>  pvc 8/99
>   service-policy output test123

hierarchical queueing on 72xx is supported since 12.0(26)S
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s26/fswfq26.htm

This is also indirectly stated at http://www.cisco.com/warp/public/121/where_policy.html

"Controlling IP-Layer Flows With Class-Based Shaping

ATM interfaces support native ATM-layer shaping using a command such as vbr-nrt and abr.
Additionally, you may choose to shape particular IP-layer flows or subnets forwarded
through an ATM interface. As of Cisco IOS Software Release 12.2(8)T, only the Cisco 7500
Series running distributed QoS services supports such a configuration with Cisco IOS 12.2
mainline, 12.1E and 12.0S release trains.

.....

The Cisco 7200 and 7500 support class-based shaping for ATM VCs only in 12.0(26)S and
later S train"

Really, 7500/VIP supports it early in 12.0S, 12.1E, 12.2. But 7200 exactly from 12.0(26)S
and seems this feature is not integrated in any other trains yet. May be I'm wrong, but
some tests with HQ on 72xx/12.2(25)S on I/O's FE shows that it's not supported yet in
12.2S

Not sure about 12.2(25)S exactly for the case with ATM. Try to check if this really works
with 'sh policy-map interface', 'sh queueing int ..', 'sh hqf interface'.


Denis.