failover雙活

A/A模式HA

關鍵點：

1、A/A failover 利用了多模式，在不同的物理設備上active不同的虛墻以達到雙活目的

2、主要在primary節點做配置，secondary節點會從primary節點同步配置，包含system和context

3、secondary節點配置任務僅包括：多模式啟用、物理接口啟用、failover基本配置（啟用failover、指定為secondary節點、指定并命名failover lan接口，failover lan接口IP）

配置步驟

1、 準備動作：

primary節點和secondary節點都啟用多模式

啟用必要的物理接口

2、primary節點做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，啟用failover

3、在primary節點構造虛墻v1、v2，并分派虛墻關聯failover組

主設備：

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、虛墻常規配置

只在primary節點做配置，啟用Failover后，secondary節點會copy該配置

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、確定primary節點failover狀態正常后，配置secondary節點基本failover工作參數

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節點failover狀態正常后，達到preempt閥值，secondary節點會接管group 2