思科接口和模块 : Cisco ACE 设备控制引擎模块

ACE客户端和服务器击中同样VIP

2016 年 10 月 24 日 - 机器翻译
其他版本: PDFpdf | 英语 (2015 年 8 月 22 日) | 反馈


目录


简介

本文档为客户端和服务器抵达相同虚拟 IP 地址 (VIP) 的应用控制模块 (ACE) 提供了一个配置范例。客户端在服务器上进行了负载均衡,并且未使用网络地址转换 (NAT),但抵达 VIP 的服务器使用了源 NAT。

此范例使用两个上下文;管理上下文用于远程管理和容错 (FT) 配置,第二个上下文 C1 用于负载均衡。

先决条件

要求

本文档没有任何特定的要求。

使用的组件

本文档不限于特定的软件和硬件版本。

本文档中的信息都是基于特定实验室环境中的设备编写的。本文档中使用的所有设备最初均采用原始(默认)配置。如果您使用的是真实网络,请确保您已经了解所有命令的潜在影响。

规则

有关文档规则的详细信息,请参阅 Cisco 技术提示规则

背景信息

  • 单臂模式 - 当进行 VIP 连接的设备进入服务器所在的相同 VLAN 上的 ACE 时使用此拓扑。服务器答复流量必须返回 ACE,然后才能发送到启动该连接的设备。可以使用源 NAT 或基于策略的路由完成此操作。

  • 双臂模式 – 当进行 VIP 连接的设备进入与服务器所在的 VLAN 不同的 VLAN 上的 ACE 时使用此拓扑。如果服务器的默认网关设置为该 ACE,则不需要源 NAT。答复流量将返回 ACE,然后再发送回客户端。

配置

本部分提供有关如何配置本文档所述功能的信息。

注意: 使用命令查找工具仅限注册用户)可获取有关本部分所使用命令的详细信息。

网络图

本文档使用以下网络设置:

/image/gif/paws/107398/client-server-same-vip-1.gif

配置

本文档使用以下配置:

  • Catalyst 6500 - ACE 插槽 2 C1 上下文

  • Catalyst 6500 - ACE 插槽 2 管理上下文

  • Catalyst 6500 - MSFC 配置

ACE C1 上下文
 switch/C1#show run
Generating configuration....




access-list any line 8 extended permit icmp any any 
access-list any line 16 extended permit ip any any 



!--- Access-list used to permit or 
!--- deny traffic entering the ACE.



probe http WEB_SERVERS
  interval 5
  passdetect interval 10
  passdetect count 2
  request method get url /index.html
  expect status 200 200



!--- Probe used to detect the status 
!--- of the servers in the serverfarm.



rserver host S1
  ip address 192.168.0.200
  inservice
rserver host S2
  ip address 192.168.0.201
  inservice
rserver host S3
  ip address 192.168.0.202
  inservice
rserver host S4
  ip address 192.168.0.203
  inservice

serverfarm host SF-1
  probe WEB_SERVERS
  rserver S1
    inservice
  rserver S2
    inservice
  rserver S3
    inservice
  rserver S4
    inservice



!--- Traffic hitting the VIP 
!--- will be load balanced to these servers.



class-map match-all L4VIPCLASS
  2 match virtual-address 172.16.0.15 tcp eq www



!--- Layer 4 class-map defining 
!--- the IP address and port.



class-map match-all REAL_SERVERS
  2 match source-address 192.168.0.0 255.255.255.0



!--- Layer 3 class-map defining source traffic.
!--- This traffic matches server initiated.



class-map type management match-any REMOTE_ACCESS
  2 match protocol ssh any
  3 match protocol telnet any
  4 match protocol icmp any
  5 match protocol snmp any
  6 match protocol http any



!--- Management class-map defining 
!--- what protocols can manage the ACE.



policy-map type management first-match REMOTE_MGMT_ALLOW_POLICY
  class REMOTE_ACCESS
    permit

policy-map type loadbalance http first-match WEB_L7_POLICY
  class class-default
    serverfarm SF-1



!--- Layer 4 policy-map defining 
!--- the serverfarm that will be used.



policy-map multi-match VIPs
  class L4VIPCLASS
    loadbalance vip inservice
    loadbalance policy WEB_L7_POLICY
    loadbalance vip icmp-reply active
    loadbalance vip advertise active
  class REAL_SERVERS
    nat dynamic 1 vlan 511



!--- Traffic originating from clients 
!--- will only match class L4VIPCLASS.
!--- This traffic will not use source NAT.
!--- Servers that make a connection to the 
!--- VIP will match both classes and will use
!--- natpool 1 to change the source address 
!--- of the server to 192.168.0.254 before
!--- it is loadbalanced.



interface vlan 240
  ip address 172.16.0.130 255.255.255.0
  alias 172.16.0.128 255.255.255.0
  peer ip address 172.16.0.131 255.255.255.0
  access-group input any
  service-policy input REMOTE_MGMT_ALLOW_POLICY
  service-policy input VIPs
  no shutdown



!--- Apply access-lists and service policies 
!--- to the client side VLAN.



interface vlan 511
  ip address 192.168.0.130 255.255.255.0
  alias 192.168.0.128 255.255.255.0
  peer ip address 192.168.0.131 255.255.255.0
  access-group input any
  nat-pool 1 192.168.0.254 192.168.0.254 netmask 255.255.255.0 pat
  service-policy input VIPs
  no shutdown


!--- For servers to be able to hit the VIP 
!--- the service-policy VIPs will also need to be applied here.



ip route 0.0.0.0 0.0.0.0 172.16.0.1



switch/C1#

ACE 管理上下文
switch/Admin#show running-config
Generating configuration....



boot system image:c6ace-t1k9-mz.A2_1_0a.bin

resource-class RC1
  limit-resource all minimum 50.00 maximum equal-to-min



!--- Resource-class used to limit 
!--- the amount of resources a specific context can use.



access-list any line 8 extended permit icmp any any 
access-list any line 16 extended permit ip any any 


rserver host test

class-map type management match-any REMOTE_ACCESS
  2 match protocol ssh any
  3 match protocol telnet any
  4 match protocol icmp any
  5 match protocol snmp any
  6 match protocol http any


policy-map type management first-match REMOTE_MGMT_ALLOW_POLICY
  class REMOTE_ACCESS
    permit


interface vlan 240
  ip address 172.16.0.4 255.255.255.0
  alias 172.16.0.10 255.255.255.0
  peer ip address 172.16.0.5 255.255.255.0
  access-group input any
  service-policy input REMOTE_MGMT_ALLOW_POLICY
  no shutdown
interface vlan 511
  ip address 192.168.0.4 255.255.255.0
  alias 192.168.0.10 255.255.255.0
  peer ip address 192.168.0.5 255.255.255.0
  access-group input any
  no shutdown

ft interface vlan 550
  ip address 192.168.1.4 255.255.255.0
  peer ip address 192.168.1.5 255.255.255.0
  no shutdown



!--- VLAN used for fault tolerant traffic. 



ft peer 1
  heartbeat interval 300
  heartbeat count 10
  ft-interface vlan 550



!--- FT peer definition defining heartbeat 
!--- parameters and to associate the ft VLAN.



ft group 1
  peer 1
  peer priority 90
  associate-context Admin
  inservice



!--- FT group used for Admin context.



ip route 0.0.0.0 0.0.0.0 172.16.0.1

context C1
  allocate-interface vlan 240
  allocate-interface vlan 511
  member RC1



!--- Allocate vlans the context C1 will use.


  
ft group 2
  peer 1
  no preempt
  associate-context C1
  inservice



!--- FT group used for the load balancing context C1.



username admin password 5 $1$faXJEFBj$TJR1Nx7sLPTi5BZ97v08c/  role Admin domai
n default-domain 
username www password 5 $1$UZIiwUk7$QMVYN1JASaycabrHkhGcS/  role Admin domain 
default-domain 

switch/Admin#

路由器配置

!--- Only portions of the config relevant
!--- to the ACE are displayed.


sf-cat1-7606#show run
Building configuration...


!--- Output Omitted.


svclc multiple-vlan-interfaces
svclc module 2 vlan-group 2
svclc vlan-group 2  220,240,250,510,511,520,540,550

!


!--- Before the ACE can receive traffic 
!--- from the supervisor engine in the Catalyst 6500
!--- or Cisco 6600 series router, you must 
!--- create VLAN groups on the supervisor engine,
!--- and then assign the groups to the ACE.
!--- Add vlans to the vlan-group that are needed 
!--- for ALL contexts on the ACE.



interface Vlan240
 description public-vip-172.16.0.x 
 ip address 172.16.0.2 255.255.255.0
 standby ip 172.16.0.1
 standby priority 20
 standby name ACE_slot2

!

!--- SVI (Switch Virtual Interface). 
!--- The standby address is the default gateway for the ACE.

!--- Output Omitted.


sf-cat1-7606#

验证

使用本部分可确认配置能否正常运行。

  • Show serverfarm 名称 — 显示有关服务器群和 rserver 的状态的信息。

    此示例提供输出示例: :

    switch/C1#show serverfarm SF-1 
     serverfarm     : SF-1, type: HOST
     total rservers : 4
    
    switch/C1# show serverfarm SF-1 
     serverfarm     : SF-1, type: HOST
     total rservers : 4
    
     ---------------------------------
                                               ----------connections-----------
           real             weight state        current    total      failures 
       ---+---------------------+------+------------+----------+----------+----
       rserver: S1
           192.168.0.200:0       8      OPERATIONAL  0          31         0
       rserver: S2
           192.168.0.201:0       8      OPERATIONAL  0          30         0
       rserver: S3
           192.168.0.202:0       8      OPERATIONAL  0          30         0
       rserver: S4
           192.168.0.203:0       8      OPERATIONAL  0          29         0
    
    switch/C1#
  • Show service-policy name — 显示有关多匹配策略的信息。使用此命令验证 VIP 是否获得连接以及是否断开连接。

    此示例提供输出示例: :

    switch/C1#show service-policy VIPs 
    
    Status     : ACTIVE
    -----------------------------------------
    Interface: vlan 240 511 
      service-policy: VIPs
        class: L4VIPCLASS
          loadbalance:
            L7 loadbalance policy: WEB_L7_POLICY
            VIP Route Metric     : 77
            VIP Route Advertise  : ENABLED-WHEN-ACTIVE
            VIP ICMP Reply       : ENABLED-WHEN-ACTIVE
            VIP State: INSERVICE
            curr conns       : 0         , hit count        : 120       
            dropped conns    : 0         
            client pkt count : 1007      , client byte count: 139433              
            server pkt count : 1122      , server byte count: 1237658             
            conn-rate-limit      : 0         , drop-count : 0         
            bandwidth-rate-limit : 0         , drop-count : 0         
        class: REAL_SERVERS
          nat:
            nat dynamic 1 vlan 511
            curr conns       : 0         , hit count        : 41        
            dropped conns    : 0         
            client pkt count : 514       , client byte count: 78758               
            server pkt count : 608       , server byte count: 708319              
            conn-rate-limit      : 0         , drop-count : 0         
            bandwidth-rate-limit : 0         , drop-count : 0         
    
    switch/C1#
  • Show conn — 显示有关 ACE 上的当前连接的信息。

    此示例提供输出示例: :

    switch/C1#show conn
    
    total current connections : 8
    
    conn-id np dir proto vlan source          destination        state
    ----------+--+---+-----+----+---------------------+----------------
    -+
    11 1  in  TCP   511  192.168.0.200:1380  172.16.0.15:80      ESTAB
    9  1  out TCP   511  192.168.0.203:80    192.168.0.254:1065  ESTAB
    12 2  in  TCP   240  130.10.96.221:2446  172.16.0.15:80      ESTAB
    9  2  out TCP   511  192.168.0.200:80    130.10.96.221:2446  ESTAB
    switch/C1#
    
    
    
    !--- Top two lines are the server connecting to the VIP. 
    !--- 192.168.0.254 is the natpool address.
    !--- Bottom two lines are a client making a connection to the VIP.
    
    

故障排除

目前没有针对此配置的故障排除信息。


相关信息


Document ID: 107398