04-30-2012 02:49 AM - edited 03-01-2019 05:34 PM
Hi, with IPV4 you use CBWFQ with a Priority queue for voice (marked EF) traffic. However priority queuing is not supported for IPV6 traffic on routers such as the G2's (29xx, 39xx), so what are the alternative LLQ queuing mechanisms for an outbound QoS policy to give low latency? Seaching CCO I can find nothing on this subject.
Thanks
Mick Russell
04-30-2012 04:23 AM
Hi Russell,
Do you have any document/link that states the G2 does not support queuing for IPv6 traffic ? On the data sheet is not mentioned something like this
http://www.cisco.com/en/US/prod/collateral/routers/ps10536/data_sheet_c78_553924.html
Did you try :
class-map ipv6-voice
match protocol ipv6
match dscp ef
policy-map LLQ
class ipv6-voice
priority 25
Dan
05-01-2012 04:12 AM
Dan, yes I did see the use of classifying ipv6 traffic, but thought this would not work with a priority queue. I have just tried it and it does work. So now I have two priority queues in my policy-map, one for IPV4 and one for IPV6.
class-map match-all ipv6-voice
match protocol ipv6
match dscp ef
class-map match-any ce_ef_output
Thanks
Mick
match ip dscp cs5 ef
!
Policy outbound
Description QoS policy for 5 VLANS 42.5 Mbit/s per access cdr 42.5 - 12 %EF -layer 1 Kbit/s EF 3079 AF 7528 DE 3346
! - 90% ipv4 10% ipv6
class ce_ef_output
police 3550500 27000 27000 conform-action set-dscp-transmit EF exceed-action set-dscp-transmit EF violate-action drop
priority 3550
class ipv6-voice
priority 394
police 394500 3000 3000 conform-action set-dscp-transmit EF exceed-action set-dscp-transmit EF violate-action drop
!
class ce_af4_output
bandwidth 7865
etc
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide