failover双活

A/A模式HA

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关键点:

1、A/A failover 利用了多模式,在不同的物理设备上active不同的虚墙以达到双活目的

2、主要在primary节点做配置,secondary节点会从primary节点同步配置,包含system和context

3、secondary节点配置任务仅包括:多模式启用、物理接口启用、failover基本配置(启用failover、指定为secondary节点、指定并命名failover lan接口,failover lan接口IP)

配置步骤

1、 准备动作:

primary节点和secondary节点都启用多模式

启用必要的物理接口

2、primary节点做failover配置

ciscoasa(config)# sh run failover

no failover

failover lan unit primary

failover lan interface fo-lan GigabitEthernet2

failover interface ip fo-lan 192.168.0.1 255.255.255.0 standby 192.168.0.2

failover group 1

preempt 60

failover group 2

secondary

preempt 60

最后,启用failover

3、在primary节点构造虚墙v1、v2,并分派虚墙关联failover组

主设备:

ciscoasa(config)# sh run context

admin-context admin

context admin

config-url disk0:/admin.cfg

!

context v1

allocate-interface GigabitEthernet0 ifinside

allocate-interface GigabitEthernet1 ifoutside

config-url disk0:/v1.cfg

join-failover-group 1

!

context v2

allocate-interface GigabitEthernet3 ifinside

allocate-interface GigabitEthernet4 ifoutside

config-url disk0:/v2.cfg

join-failover-group 2

!

4、虚墙常规配置

只在primary节点做配置,启用Failover后,secondary节点会copy该配置

changeto context v1

sh run

interface ifinside

nameif inside

security-level 100

ip address 20.0.1.1 255.255.255.0

!

interface ifoutside

nameif outside

security-level 0

ip address 5.5.5.5 255.255.255.0

!

changeto context v2

interface ifinside

nameif inside

security-level 100

ip address 30.0.1.1 255.255.255.0

!

interface ifoutside

nameif outside

security-level 0

ip address 6.6.6.6 255.255.255.0

!

5、确定primary节点failover状态正常后,配置secondary节点基本failover工作参数

failover

failover lan unit secondary

failover lan interface fo-lan GigabitEthernet2

failover interface ip fo-lan 172.16.0.1 255.255.255.0 standby 172.16.0.2

6、等待配置同步,secondary节点failover状态正常后,达到preempt阀值,secondary节点会接管group 2


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