Hi All,
I need some advise with a simple (so I hope) QoS setup, I have been tasked to design a QoS policy to prioritise voice and video traffic from a Telepresence unit that is transiting our MPLS network. The Telepresence unit and WAN router is connected to a Cisco 6500 that has a Sup2t. See attached diagram.
The Telepresence unit automatically marks voice, video and signalling traffic with the required DCSP values and I understand that the 6500 with Sup2t will trust these DSCP marking by default with no QoS configuration. My initial plan was to simply match these DSCP values on our edge router and use LLQ/CBWFQ to prioritise the traffic as required. However, I have now been asked to ensure that LAN QoS is configured on the 6500 by enabling ingress and egress queuing on the interface connecting to the WAN router.
I have looked through a number of documents and I'm confused about what config is required. The line card is 1G which uses a 1P3Q8T queuing architecture and COS to queue mapping.
Just looking at egress interface queuing for the moment, I believe that I just need to configure something similar to the following.
class-map type lan-queuing match REALTIME
match cos 4 5
class-map type lan-queuing match CONTROL
match cos 6 7
class-map type lan-queueing match SIGNALLING
match cos 3
!
policy-map type lan-queuing EGRESS-Q
class REALTIME
priority
class CONTROL
bandwidth remaining percent 5
class SIGNALLING
bandwidth remaining percent 5
class class-default
bandwidth remaining percent 90
!
interface GigabitEthernetx/x
service-policy type lan-queuing output EGRESS-Q
Does this look correct? Also as I need to match on COS, will the 6500 automatically map DSCP to COS or will I need to modify the mapping? Also can I simply attach the service policy on a single interface on a line card or will it need to be multiple interfaces that share the same ASIC as I have seen some docs mentioning this?
Thanks in advance
