09-27-2006 01:58 AM
Hi there,
I've been asked to implement qos on a router (2800), and as an absolute beginner I was hoping someone would be able to check my config please...
Basic premise is that we need to classify VoIP traffic as highest, then Telnet and RDP, then all else:
#Set ACL to capture all priority traffic
Ip access-list extended priority
Permit tcp any any eq 3389
Permit tcp any any eq 23
Deny ip any any
#Set traffic to be grouped
Class-map match-all critical
Match protocol rtp
Class-map match-all priority
Match access-group priority
Class-map match-all default
Match ip dscp default
#Classify inbound traffic
policy-map classify-traffic
class critical
set ip dscp ef
class priority
set ip dscp af31
class default
set ip dscp default
#Set outbound queue priority
policy-map queue-on-dscp
class critical
priority percent 50
class priority
bandwidth percent 40
class default
fair queue
random-detect dscp-based
#Assign inbound classification
Interface fa2/0/2
Service-policy input classify-traffic
#Assign outbound queuing
Interface s0/0
Service-policy output queue-on-dscp
My feeling is that I've got one step too many in there...do I really need to dscp classify on ingress when I'm egress queuing based on my class maps? And is this correct, or am I way off the mark?!
Any contstuctive advice would be most appreciated.
Thanks
J2026
Solved! Go to Solution.
09-27-2006 05:34 AM
Hi
If your QoS policy map matches on protocol/acces s list etc, then you don't need to classify on ingress.
You could classify on ingress (in which case your policy map would mark traffic with a DSCP value) and then use these markings in your QoS policy if you wanted... but this is just overcomplicating it.
I'd just use the outbound policy.
Regards
Aaron
Please rate helpful posts...
09-27-2006 05:34 AM
Hi
If your QoS policy map matches on protocol/acces s list etc, then you don't need to classify on ingress.
You could classify on ingress (in which case your policy map would mark traffic with a DSCP value) and then use these markings in your QoS policy if you wanted... but this is just overcomplicating it.
I'd just use the outbound policy.
Regards
Aaron
Please rate helpful posts...
09-27-2006 07:28 AM
Thanks alot Aaron, that's confirmed what I was thinking.
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