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C3750只是支持srr-squeue,不支持出方向的service-policy,所以,改变不同类型数据包的CoS值,再在出口上做srr-squeue就可以了。
1.voip流量在DSCP中一般标记为46(EF) 或者COS 5
2.在做SRR入口队列时候一般把COS 2,3,4,5,6,7划入队列2 优先级队列,而把0,1 划入sharing队列
3.在SRR做出口队列时候会将COS 5(VOICE流量RTP流量) 划分进 队列1 priority 队列,将3,6,7划分进队列2 ~ 而COS 3为信令控制协议流,将2,4 划分进3号队列.最后将0,1划分进4号队列,此队列一般为接电话的PC机流量.
4.在入口配置中,接口一共支持2个Q队列(1和2)和1个P队列.
5.在出口配置中,接口一共支持4个Q队列(1-4)和1个P队列.
access-list 10 remark cdn
access-list 10 permit 220.170.193.50
access-list 10 permit 220.170.193.60
access-list 120 remark ipad
access-list 120 permit tcp any any range 81 82
access-list 121 remark vod
access-list 121 permit tcp any any eq www
access-list 121 permit tcp any any eq 8080
access-list 121 permit tcp any any eq 19765
access-list 121 permit tcp any any eq 8888
class-map match-all cdn
match access-group 10
class-map match-all ipad
match access-group 120
class-map match-all vod
match access-group 121
policy-map qos
class cdn
set dscp cs5
class ipad
set dscp cs3
class vod
set dscp cs2
class class-default
set dscp default
int range g1/0/1 - 24
bandwidth 1000000
service-policy input qos
int g1/0/25
bandwidth 1000000
mls qos trust cos
srr-queue bandwidth share 50 10 10 30
srr-queue bandwidth limit 90
priority-queue out
show mls qos int gigabitEthernet 1/0/25 buffers
show mls qos int gigabitEthernet 1/0/25 queueing |
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