[c-nsp] Is this QoS config possible in 7600 with WS-X6724-SFP?

ryanL ryan.landry at gmail.com
Sun Mar 27 11:07:28 EDT 2011


we've had success putting voice into the priority queue on 6724 ports,
but in a routed topology. you still might want to look into these
port-level features:

priority-queue queue-limit <x>
priority-queue cos-map <x>

On Sat, Mar 26, 2011 at 4:12 PM, Peter Olsson <pol at leissner.se> wrote:
> We usually use this QoS config to give voice traffic priority:
> class-map match-all VOICE
>  match ip dscp ef
> policy-map BRANCH-WAN-EDGE_child
>  class VOICE
>  priority percent 10
>  class class-default
>  fair-queue
>  random-detect dscp-based
> policy-map BRANCH-WAN-EDGE_parent
>  class class-default
>  shape average 100000000
>  service-policy BRANCH-WAN-EDGE_child
> interface GigabitEthernet0/1.402
>  service-policy output BRANCH-WAN-EDGE_parent
>
> But now we have to do this in a 7609 with WS-X6724-SFP cards.
> The setup is that the WAN lines come in on a 3750 switch, and
> the 3750 switch is connected to the 7609 on two gigabit ports
> in different WS-X6724-SFP cards, combined by a port-channel.
> In the 7609 the WAN VLAN is terminated like this:
> interface Vlan402
>  bandwidth 100000
>  ip address xxx
>
> All physical ports in the 7609 trust dscp:
> mls qos trust dscp
> Other than that we only have this QoS config in the 7609:
> mls qos
> mls qos map cos-dscp 0 8 16 24 32 46 48 56
>
> I tried our usual config and some other variants, but the
> 7609 won't accept shaping or priority or hierarchical QoS.
> Probably because it doesn't have real WAN cards since the WAN
> lines are connected to the 3750.
>
> Is there any way to do what we want in the 7609?
> The only requirement right now is to give priority to traffic
> marked with dscp ef. We would prefer to configure this priority
> per VLAN if possible, but will do it on the physical interfaces
> (or maybe on the port-channel?) if that's the only way.
>
> A possible complication is that the WAN lines have different
> bandwidth. Usually 50 Mbps, but some are 100 Mbps. This is why
> priority configuration per VLAN is preferred.
>
> Thanks!
>
> --
> Peter Olsson                    pol at leissner.se
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