拥塞管理之－－－CBWFQ 
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 源为R1，目标为R3，在R2上定义CBWFQ使：
1,ping保证带宽为20K 2,telnet保证带宽为1M 基本配置
R1
conf t int f 0/0 ip ad 10.1.1.1 255.255.255.0 no shut router rip ver 2 no au net 10.0.0.0 end R2
conf t int f 0/0 ip ad 10.1.1.2 255.255.255.0 no shut int s2/0 ip ad 10.1.2.2 255.255.255.0 encap f no arp f no frame inver frame map ip 10.1.2.3 203 b no shut router rip ver 2 no au net 10.0.0.0 exit access-list 100 permit icmp host 10.1.1.1 host 10.1.2.3 access-list 101 permit tcp host 10.1.1.1 host 10.1.2.3 eq telnet class-map PING match access-group 100 exit class-map TELNET match access-group 101 exit policy-map CBWFQ class PING bandwidth 20 class TELNET bandwidth 1000 exit int s2/0 service-policy output CBWFQ /*CBWFQ只支持output方向策略 end R3
conf t int s2/0 ip ad 10.1.2.3 255.255.255.0 encap f no arp f no frame inver frame map ip 10.1.2.2 302 b no shut router rip ver 2 no au net 10.0.0.0 line vty 0 4 password cisco login end 校验 R1#ping 10.1.2.3 Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.2.3, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 12/52/88 ms R1#telnet 10.1.2.3 Trying 10.1.2.3 ... Open User Access Verification Password:
R3>quit [Connection to 10.1.2.3 closed by foreign host]
R2#sh ip access-list Extended IP access list 100 10 permit icmp host 10.1.1.1 host 10.1.2.3 (5 matches) Extended IP access list 101 10 permit tcp host 10.1.1.1 host 10.1.2.3 eq telnet (22 matches) R2#sh policy-map int s2/0 Serial2/0
Service-policy output: CBWFQ
Class-map: PING (match-all)
10 packets, 1040 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: access-group 100 Queueing Output Queue: Conversation 265 Bandwidth 20 (kbps) Max Threshold 64 (packets) (pkts matched/bytes matched) 0/0 (depth/total drops/no-buffer drops) 0/0/0 Class-map: TELNET (match-all)
39 packets, 1844 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: access-group 101 Queueing Output Queue: Conversation 266 Bandwidth 1000 (kbps) Max Threshold 64 (packets) (pkts matched/bytes matched) 2/100 (depth/total drops/no-buffer drops) 0/0/0 R2#sh queue s2/0 Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: Class-based queueing Output queue: 0/1000/64/0 (size/max total/threshold/drops) Conversations 0/1/256 (active/max active/max total) Reserved Conversations 2/2 (allocated/max allocated) Available Bandwidth 138 kilobits/sec 当使用RTP和LLQ时
R2
class-map VOICE match dscp ef policy-map LLQ class VOICE priority 50 /×限定dscp值为ef的流量为50K int s2/0 ip rtp priority 20000 21000 100 /*限定UDP端口范围从20000到21000的流量带宽为100K service-policy output LLQ end 本文出自 “穿过地狱去看海” 博客，谢绝转载！ 本文出自 51CTO.COM技术博客 |
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