LilYoda
Feline with squirel personality disorder
Premium
join:2004-09-02
Mountains
2 edits |  reply to LilYoda
[Config] QoS+VoIP on a Cisco - queuing
And here's the beauty, the queuing engine
Took me a while to figure it out
class-map match-any VoIP-Class-Outbound
match ip precedence 7
class-map match-any Hi-Class-Outbound
match ip precedence 6
match ip precedence 5
class-map match-any Med-Class-Outbound
match ip precedence 4
match ip precedence 3
class-map match-any Lo-Class-Outbound
match ip precedence 2
match ip precedence 1
But in my experience, you have to be really aggressive to slow down eMule and Bittorent traffic.
policy-map Data-Only-Queueing
class Hi-Class-Outbound
bandwidth percent 50
random-detect prec-based
random-detect exponential-weighting-constant 8
random-detect precedence 6 20 60 20
random-detect precedence 5 6 15 6
class Med-Class-Outbound
bandwidth percent 25
random-detect prec-based
random-detect exponential-weighting-constant 8
random-detect precedence 4 15 30 15
random-detect precedence 3 1 15 3
class Lo-Class-Outbound
bandwidth percent 25
random-detect prec-based
random-detect exponential-weighting-constant 3
random-detect precedence 2 15 30 15
random-detect precedence 1 1 15 3
Uses LLQ with 72Kbps assigned to the Voice class, and 171Kbps assigned to data, using the queuing defined above
policy-map Packet-Queueing
class VoIP-Class-Outbound
priority 72
class class-default
shape average 171000
bandwidth 171
service-policy Data-Only-Queueing
max-reserved-bandwidth 95 leaves 14Kbps (in my case) for anything that wasn't foreseen (routing updates, uncolored traffic, etc...)
interface Ethernet0
bandwidth 256
max-reserved-bandwidth 95
service-policy output Packet-Queueing
tx-ring-limit 2
tx-queue-limit 2 |
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hlygrail
join:2002-09-08
| God Bless You!!
I was getting ready to post a question looking for a way to assign priority queueing to my 1720, having tried and failed (now I see why!).
Thank you for doing -- and DOCUMENTING -- the legwork for all to benefit. |
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paarlberg
join:2000-07-28
Lilburn, GA
| Here is what I used on my 2621 to add QoS for H.323 and 3Com NBX pbx and phones. The "match ip dscp 46" was for the 3Com NBX portion.
**********************************************
ip cef
class-map match-any VOICE
match protocol rtp
match ip dscp 46
exit
policy-map QOS-RTP
class VOICE
priority percent 50
exit
**********************************************
Then you must apply to each interface that you want it to use..
**********************************************
interface
service-policy output QOS-RTP
**********************************************
You can also set priority by max bandwidth instead of percent (128k in the example below). Would recommend percent on ADSL and bandwidth for ethernet or high-speed serial. If you use both create a new policy-map for that.. QOS-RTP-DSL and QOS-RTP-ETH, or something like that..
**********************************************
priority bandwidth 128
********************************************** |
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