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一个很有实用价值的QoS策略配置实例


  某公司QoS策略配置实例
  
  Current configuration : 3568 bytes
  !
  !
  version 12.2
  service timestamps debug datetime
  service timestamps log datetime
  service password-encryption
  !
  hostname xxxxxx
  !
  enable secret 5 $1$uJPt$/Uh
  !
  clock timezone China 8
  ip subnet-zero
  no ip source-route
  ip cef
  !
  !
  ip name-server x.x.x.x
  ip name-server x.x.x.x
  !
  no ip bootp server
  !
  class-map match-any premium_class
  description For premium
  match protocol fasttrack
  match protocol http
  match protocol icmp
  match protocol napster
  match protocol netshow
  match protocol pcanywhere
  match protocol realaudio
  match protocol streamwork
  match protocol vdolive
  match protocol cuseeme
  match protocol telnet
  match protocol secure-http
  match access-group 110
  match ip precedence 5
  match ip precedence 4
  match ip precedence 3
  class-map match-any normal_calss
  description For normal
  match protocol ftp
  match protocol imap
  match protocol pop3
  match protocol secure-ftp
  match protocol secure-imap
  match protocol secure-pop3
  match protocol smtp
  match access-group 120
  match ip precedence 2
  match ip precedence 1
  !
  !
  policy-map qos_policy_map
  class premium_class
  bandwidth percent 50
  random-detect
  random-detect exponential-weighting-constant 4
  police cir 2000000 bc 10000 be 10000
  conform-action transmit
  exceed-action transmit
  class normal_calss
  bandwidth percent 25
  random-detect
  random-detect exponential-weighting-constant 4
  police cir 2000000 bc 2000 be 2000
  conform-action transmit
  exceed-action drop
  !
  !
  !
  !
  interface FastEthernet0/0
  ip address 192.168.0.1 255.255.255.0
  ip address 192.168.1.1 255.255.255.0 secondary
  ip access-group 130 in
  ip verify unicast reverse-path
  ip nat inside
  ip route-cache same-interface
  ip route-cache policy
  ip policy route-map qos
  duplex auto
  speed auto
  no cdp enable
  !
  interface Serial0/0
  bandwidth 2048
  ip address x.x.x.x 255.255.255.252
  ip verify unicast reverse-path
  no ip proxy-arp
  ip nat outside
  rate-limit input 2000000 20000 20000 conform-action transmit exceed-action drop
  ip route-cache policy
  service-policy output qos_policy_map
  no cdp enable
  !
  ip nat inside source list 10 interface Serial0/0 overload
  ip classless
  ip route 0.0.0.0 0.0.0.0 x.x.x.x
  
  ip route 192.168.0.0 255.255.255.0 192.168.1.1
  ip route 192.168.1.0 255.255.255.0 192.168.0.1
  no ip http server
  no ip pim bidir-enable
  !
  !
  access-list 10 remark NAT
  access-list 10 permit 192.168.0.0 0.0.0.255
  access-list 10 permit 192.168.1.0 0.0.0.255
  access-list 110 remark normal
  access-list 110 permit ip 192.168.0.0 0.0.0.255 any
  access-list 120 remark premium
  access-list 120 permit ip 192.168.1.0 0.0.0.255 any
  access-list 130 remark anti BT and anti-virus
  access-list 130 deny tcp any any range 6881 6890 time-range work
  access-list 130 deny tcp any range 6881 6890 any time-range work
  access-list 130 deny tcp any any range 6969 6979 time-range work
  access-list 130 deny tcp any range 6969 6979 any time-range work
  access-list 130 deny tcp any any range 7000 7100 time-range work
  access-list 130 deny tcp any range 7000 7100 any time-range work
  access-list 130 deny tcp any any range 9995 9996
  access-list 130 deny tcp any range 9995 9996 any
  access-list 130 deny tcp any any eq 5554
  access-list 130 deny tcp any eq 5554 any
  access-list 130 permit ip any any
  no cdp run
  route-map qos permit 10
  match ip address 110
  set ip precedence priority
  !
  route-map qos permit 20
  match ip address 120
  set ip precedence critical
  !
  banner motd ^CUnauthorized access will be Prosecuted!!!^C
  !
  line con 0
  exec-timeout 0 0
  line aux 0
  line vty 0 4
  password 7 121A0C0411045D5D7C
  login
  !
  time-range work
  periodic weekdays 8:30 to 18:00
  !
  !
  end
  
  公司有两个内网段:192.168.0.0/24,192.168.1.0/24。
  192.168.0.0/24为低优先级内网段,192.168.1.0/24为高优先级内网段。
  在class-map中premium_class类包括了192.168.1.0/24高优先级内网段,采用NBAR匹配实时性较高的应用如:napster、netshow、pcanywhere、realaudio、streamwork、vdolive、cuseeme、telnet等。
  normal_class类包括了192.168.0.0/24低优先级内网段,采用NBAR匹配实时性不强的应用如:ftp、pop3、smtp等。
  在policy-map中针对不同的class,采取不同的策略。如:CBWFQ、WRED等。因为公司互联网带宽为2M,故考虑WRED中的指数加权因子为4,最小阀值为5,最大阀值为17,标记几率分母为1。
  在route-map(PBR)中采用匹配不同的ACL 110#,ACL 120#。设置不同的IP precedence值。
  在F 0/0以太口上增加inbound policy--ACL 130#,在上班时间8:30到18:00禁止BT下载。限制震荡波病毒的端口。
  在S 0/0串口上采用Input CAR策略。对进入S 0/0串口的流量进行整形。

本文来源:天下网吧 作者:网吧方案

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