思科认证QOS配置案例

思科认证QOS怎么配置?下面yjbys小编为大家带来的是最新ciscoQOS配置案例，希望对大家学习有所帮助!

　　典型QoS配置案例

　　一般的QoS配置不外乎四个步骤：

1，设置ACL匹配应用流量;

2，设置class-map匹配相应ACL或者相应端口等等，不过一般式匹配ACL;

3，设置policy-map匹配class-map，然后定一规则动作;

4，将policy-map绑定到相应的接口上。下面使用一个比较典型的案例来说明QoS的.配置步骤：需求：路径带宽为622Mbps，四种应用流量，需要保证如下几点：

流量1，某一具体应用流量，永远优先传输，最小带宽保证为365Mbps;

流量2，某一具体应用流量，次优先传输，最小带宽保证为200Mbps;

流量3，此为业务流量，保证在1和2后的其余带宽下传输即可;

流量4，某一具体应用流量，保证在123流量外的带宽下传输即可。具体配置如下：

　　第一步，定义ACL匹配应用流量：

ip access-list extended tra1_acl

permit tcp eq 8818

ip access-list extended tra2_acl

permit tcp eq 901

ip access-list extended tra4_acl

permit ip

　　第二步，定义class-map匹配相关ACL：

class-map match-all tra1_cmap

match access-group name tra1_acl

class-map match-all tra2_cmap

match access-group name tra2_acl

class-map match-all tra4_cmap

match access-group name tra4_acl

　　第三步，定义policy-map：

policy-map tra_pmap

class tra1_cmap

set precedence 5

plicy cir 365000000 bc 8500000 be 13500000 conform-action transmit exceed-action set-prec-transmit 3 violate-action set-prec-transmit 2

bandwitch 365000

class tra2_cmap

set precedence 4

policy cir 200000000 bc 10000000 be 13000000 conform-action transmit exceed-action set-prec-transmit 3 violate-action set-prec-transmit 2 bandwidth 200000

class tra4_cmap

set precedence 1

class class-default

set precedence 2

　　第四步，绑定policy-map于相应的接口：

int pos1/0/0

service-policy output tra_pmap

至此，配置完毕。通过命令查看policy-map的匹配情况：

switch-a#sh policy-map interface pos1/0/0

POS1/0/0 Service-policy output: tra_map Class-map: tra1_cmap (match-all)

66639423781 packets, 74849682635166 bytes

30 second offered rate 260369000 bps, drop rate 0 bps //匹配此class-map的流量速率

Match: access-group name tra1_acl

Queueing

queue limit 91250 (packets)

(queue depth/total drops/no-buffer drops) 0/0/0

(pkts queued/bytes queued) 66639405294/74849695040832

QoS Set

ip precedence 5

Packets marked 66639423781

police:

cir 365000000 bps, bc 8500000 bytes, be 13500000 bytes //注意cir、bc和be的单位

conformed 66191701966 packets, 74341131469597 bytes; action: transmit

exceeded 218369922 packets, 232627302399 bytes; action: set-prec-transmit 4

violated 229208950 packets, 275718927918 bytes; action: set-prec-transmit 3

conformed 256761000 bps, exceed 1656000 bps, violate 1939000 bps //每个action的流量速率，注意这三个值总和应该大致等于上面的总速率;

bandwidth 365000 kbps Class-map: tra2_cmap (match-all)

11315788699 packets, 7283900643868 bytes

30 second offered rate 10753000 bps, drop rate 0 bps

Match: access-group tra2_acl

Queueing

queue limit 50000 (packets)

(queue depth/total drops/no-buffer drops) 1/0/0

(pkts queued/bytes queued) 11315783713/7283897663316

QoS Set

ip precedence 4

Packets marked 11315788699

police:

cir 200000000 bps, bc 10000000 bytes, be 13000000 bytes

conformed 11315784826 packets, 7283898283723 bytes; action: transmit

exceeded 0 packets, 0 bytes; action: set-prec-transmit 3

violated 0 packets, 0 bytes; action: set-prec-transmit 2

conformed 10753000 bps, exceed 0 bps, violate 0 bps

bandwidth 200000 kbps Class-map: tra4_cmap (match-all)

1751296887 packets, 2633425803184 bytes

30 second offered rate 149000 bps, drop rate 0 bps

Match: access-group name tra4_acl

QoS Set

ip precedence 1

Packets marked 1751296887 Class-map: class-default (match-any)

22956539608 packets, 17721898306471 bytes

30 second offered rate 196094000 bps, drop rate 528000 bps

Match: any

queue limit 14250 (packets)

(queue depth/total drops/no-buffer drops) 0/9004701/0

(pkts queued/bytes queued) 24700897941/20350618920708

QoS Set

ip precedence 2

Packets marked 22958504481

switch-a#必要命令解释：

plicy cir 365000000 bc 8500000 be 13500000 conform-action transmit exceed-action set-prec-transmit 3 violate-action set-prec-transmit 2

cir为承诺的带宽速率，即需要保证的带宽速率，单位为bps;

bc为普通突发，单位为bytes;

be为最高突发，单位为bytes;

set-prec-transmit，表示设置IP优先级并转发数据包;

上面整体命令解释为：承诺带宽365Mbps，普通突发为8.5Mbytes，最高突发为13.5Mbytes。当速率小于450Mbps(365+85)是转发数据包，当超过450Mbps小于500Mbps(365+135)是重写IP优先级为3并转发数据包，当超过500Mbps是重写IP优先级为2并转发数据包。