[c-nsp] QPPB on Cisco 3750-ME

[Tóth András]

Hi,

QPPB is not supported on DSBU switches, like the 3750 series.

Andras


On Mon, Jul 26, 2010 at 7:01 PM, Chris Mason <chris at noodles.org.uk> wrote:
> Hi,
>
> I am not having much luck on Google with regards to if this is
> supported or not, but I currently have a 3750-ME running 12.2(44)SE6
> and I am having some interesting results when trying to use QPPB. The
> same configuration works perfectly well on an ISR, but the 3750 can be
> quite feature limiting due to it's hardware nature. I wouldn't be
> using a 3750 for this sort of thing unless I needed the throughput
> with H-QoS.
>
> I have a table-map applied under BGP which sets a precedence value
> based on a community (standard QPPB) and I can see that CEF has this
> precendence value saved ready to use:
>
> Switch# show ip route 192.0.2.1
> Routing entry for 192.0.2.0/24
>  Known via "bgp 64512", distance 20, metric 0
>  Tag 100, precedence priority (1), type external         <-- IP Prec 1
>  Last update from 192.168.0.1 00:47:11 ago
>  Routing Descriptor Blocks:
>  * 192.168.0.1, from 192.168.0.1, 00:47:11 ago
>      Route metric is 0, traffic share count is 1
>      AS Hops 6
>      Route tag 100
>
> I then define "bgp-policy destination ip-prec-map" on the ingress interface:
>
> interface FastEthernet1/0/2
>  no switchport
>  ip address 10.254.0.1 255.255.255.0
>  bgp-policy destination ip-prec-map
> !
>
> When I send traffic in on this interface it isn't being marked - I
> have applied an outbound ACL which matches precedence values and I can
> see it coming through as IP Prec 0. If I originate traffic with IP
> Prec 1 then it comes through as IP Prec 1 on my ACL - the "bgp-policy"
> statement doesn't appear to be doing anything at all.
>
> Has anyone tried to use this feature on the 3750-ME before or am I
> hitting a platform limitation?
>
> Thanks,
> Chris
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