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11.10. 使用RSVP
提问 在网络中启用RSVP
回答
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#access-list 15 permit ip 192.168.1.0 0.0.0.255
Router(config)#interface FastEthernet0/0
Router(config-if)#ip rsvp bandwidth 128 56
Router(config-if)#ip rsvp neighbor 15
Router(config-if)#exit
Router(config)#end
Router#
注释 配置RSVP之前,接口要配置WFQ, CBWFQ, 或者WRED
11.11. Manual RSVP Reservations
提问
回答
Sender主机(192.168.100.202)连接R1
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#interface FastEthernet0/0
Router1(config-if)#ip address 192.168.100.21 255.255.255.0
Router1(config-if)#ip rsvp bandwidth 128 56
Router1(config-if)#exit
Router1(config)#interface Serial0/0
Router1(config-if)#no ip address
Router1(config-if)#encapsulation frame-relay
Router1(config-if)#fair-queue 64 256 37
Router1(config-if)#ip rsvp bandwidth
Router1(config-if)#exit
Router1(config)#interface Serial0/0.1 point-to-point
Router1(config-subif)#ip address 192.168.55.9 255.255.255.252
Router1(config-subif)#frame-relay interface-dlci 904
Router1(config-fr-dlci)#ip rsvp bandwidth 128 56
Router1(config-subif)#exit
Router1(config)#ip rsvp sender 192.168.9.100 192.168.100.202 UDP 1300 1300 192.168.100.202 FastEthernet0/0 55 1
Router1(config)#end
Router1#
Receiver主机(192.168.9.100)连接R4
Router4# configure terminal
Router4(config)#interface Ethernet0/0
Router4(config-if)#ip address 192.168.9.3 255.255.255.0
Router4(config-if)#ip rsvp bandwidth 128 56
Router4(config-if)#exit
Router4(config)#interface Serial0/0
Router4(config-if)#no ip address
Router4(config-if)#encapsulation frame-relay
Router4(config-if)#fair-queue 64 256 37
Router4(config-if)#ip rsvp bandwidth
Router4(config-if)#exit
Router4(config)#interface Serial0/0.1 point-to-point
Router4(config-subif)#ip address 192.168.56.5 255.255.255.252
Router4(config-subif)#frame-relay interface-dlci 107
Router4(config-fr-dlci)#ip rsvp bandwidth 128 56
Router4(config-subif)#exit
Router4(config)#ip rsvp reservation 192.168.9.100 192.168.100.202 UDP 1300 1300 192.168.9.100 Ethernet0/0 FF RATE 55 1
Router4(config)#end
Router4#
注释
11.12. 聚合RSVP的预留(Aggregating RSVP Reservations)
提问 聚合多个RSVP这样核心网络不需要对每个数据流进行追踪
回答
Router2#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router2(config)#interface FastEthernet0/0
Router2(config-if)#ip address 192.168.101.1 255.255.255.0
Router2(config-if)#ip rsvp bandwidth 128 56
Router2(config-if)#ip rsvp data-packet classification none
Router2(config-if)#ip rsvp resource-provider none
Router2(config-if)#exit
Router2(config)#interface Serial0/0.1 point-to-point
Router2(config-subif)#ip address 192.168.55.10 255.255.255.252
Router2(config-subif)#frame-relay interface-dlci 409
Router2(config-fr-dlci)#ip rsvp bandwidth 128 56
Router2(config-subif)#ip rsvp data-packet classification none
Router2(config-subif)#ip rsvp resource-provider none
Router2(config-subif)#exit
Router2(config)#end
Router2#
注释 RSVP扩展性不强,对于核心网络还是使用传统的DSCP标记方式,12.2(2)T的IOS引入了新的办法来解决此问题,核心路由器配置RSVP来支持RSVP Requests,但是队列的时候不需要使用RSVP的信息
11.13. Using Generic Traffic Shaping
提问
回答
注释
11.14. Using Frame-Relay Traffic Shaping
提问
回答
注释
11.15. Using Committed Access Rate
提问
回答
注释
11.16. 部署基于标准的PHB(Per-Hop Behavior)
提问 配置基于规范的根据DSCP位的PHB
回答
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#class-map EF
Router(config-cmap)#description Real-time application traffic
Router(config-cmap)#match ip precedence 5
Router(config-cmap)#exit
Router(config)#class-map AF1x
Router(config-cmap)#description Priority Class 1
Router(config-cmap)#match ip precedence 1
Router(config-cmap)#exit
Router(config)#class-map AF2x
Router(config-cmap)#description Priority Class 2
Router(config-cmap)#match ip precedence 2
Router(config-cmap)#exit
Router(config)#class-map AF3x
Router(config-cmap)#description Priority Class 3
Router(config-cmap)#match ip precedence 3
Router(config-cmap)#exit
Router(config)#class-map AF4x
Router(config-cmap)#description Priority Class 4
Router(config-cmap)#match ip precedence 4
Router(config-cmap)#exit
Router(config)#policy-map cbwfq_pq
Router(config-pmap)#class EF
Router(config-pmap-c)#priority 58 800
Router(config-pmap-c)#exit
Router(config-pmap)#class AF1x
Router(config-pmap-c)#bandwidth percent 15
Router(config-pmap-c)#random-detect dscp-based
Router(config-pmap-c)#exit
Router(config-pmap)#class AF2x
Router(config-pmap-c)#bandwidth percent 15
Router(config-pmap-c)#random-detect dscp-based
Router(config-pmap-c)#exit
Router(config-pmap)#class AF3x
Router(config-pmap-c)#bandwidth percent 15
Router(config-pmap-c)#random-detect dscp-based
Router(config-pmap-c)#exit
Router(config-pmap)#class AF4x
Router(config-pmap-c)#bandwidth percent 15
Router(config-pmap-c)#random-detect dscp-based
Router(config-pmap-c)#exit
Router(config-pmap)#class class-default
Router(config-pmap-c)#fair-queue 512
Router(config-pmap-c)#queue-limit 96
Router(config-pmap-c)#exit
Router(config-pmap)#exit
Router(config)#interface HSSI0/1
Router(config-if)#service-policy output cbwfqpolicy
Router(config-if)#exit
Router(config)#end
Router#
注释
11.17. AutoQoS
提问 配置路由器自动生成Voip或者一般数据包的QoS策略配置
回答
一种是针对VoIP数据的
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#ip cef
Router1(config)#interface Serial0/0
Router1(config-if)#no ip address
Router1(config-if)#encapsulation frame-relay
Router1(config-if)#exit
Router1(config)#interface Serial0/0.1 point-to-point
Router1(config-subif)#ip address 192.168.55.9 255.255.255.252
Router1(config-subif)#frame-relay interface-dlci 904
Router1(config-fr-dlci)#auto qos voip
%Creating new map-class.
Router1(config-fr-dlci)#exit
Router1(config-subif)#exit
Router1(config)#end
Router1#
*Mar 1 01:32:55.031: %RMON-5-FALLINGTRAP: Falling trap is generated because the
value of cbQosCMDropBitRate.1169.1171 has fallen below the falling-threshold va
lue 0
Router1#
针对一般的IP数据包,第一步是流量模式的收集
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#ip cef
Router1(config)#interface Serial0/0
Router1(config-if)#no ip address
Router1(config-if)#encapsulation frame-relay
Router1(config-if)#exit
Router1(config)#interface Serial0/0.1 point-to-point
Router1(config-subif)#ip address 192.168.55.9 255.255.255.252
Router1(config-subif)#frame-relay interface-dlci 904
Router1(config-fr-dlci)#auto discovery qos
Router1(config-fr-dlci)#exit
Router1(config-subif)#exit
Router1(config)#end
Router1#
第二步是生成策略
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#interface Serial0/0.1 point-to-point
Router1(config-subif)#frame-relay interface-dlci 904
Router1(config-fr-dlci)#auto qos
%Creating new map-class.
Router1(config-fr-dlci)#no auto discovery qos
Router1(config-fr-dlci)#exit
Router1(config-subif)#exit
Router1(config)#end
Router1#
注释 AutoQoS很好,但是有下面几个限制:只能针对点对点的链路,不能和frame map或者virtual templates一起使用,不能用于SVC,两端必须同时配置,必须禁止掉所有的服务策略或者access-groups即使用于其他的端口,要启用CEF。针对VoIP的AutoQoS引自12.2(15)T,通过一个宏来生成配置,可以用show auto qos来查看。针对通用IP数据流的引自12.3(7)T,自动针对数据流分类至十个不同类别,要先用auto qos然后再no掉原来的discovery。注意的是你如果后来想不用auto qos了,虽然可以no auot qos但是还是有很多配置是没法自动清除的,记得要保存之前的show auto qos的输出。AutoQoS不是万能的,要慎用
<!--[if !supportLists]-->11.18. <!--[endif]-->查看队列参数
提问 查看当前端口的队列配置
回答
Router#show queue FastEthernet0/0
Router#show queuing
注释 配置优先级队列或者自定义队列的时候show queue命令没有相应的输出 |
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