must make sure the cross connection is there.

1. must have written connection for DC to check
2. must make sure the lincense is there show verion
3. Must have a roll back plane.
4. Must communication effectively with DC guys.

show X
Show arp
show ×××-session L2l

Primary A
Gi1/1 to Switch
Gi1/2 to Switch
GI1/8 to Sec B Gi1/8 ( cross connect)
Secondary B

New Primay C
New Secondary D

Step 1.
Move all the connection from B to New Secondary D ( include cross connect)

Step 2.
Failover over the Active to New Secondary D ( in new D failover active)
show failvoer state

Step 3.
Move the Active FW to new C. ( in C failvoer active)

show xlate
show arp
ping host to see if its live
show -session-l2l to check tunnel status.

因為跟換的時候是一臺一臺更換的。

導致我在更換的時候，
比如 Old Primary 和 New Sec D 的時候， 怎麽也不工作， 原來他們之間的

Suppose
Old Primary Failvoer link to New Sec D Failover link.

現實連的是
New Priamary C Failover link to New Sec D failover link.

Note: cross connect = Failvoer link.

是主防火墻 和備用防火墻之間的通信連接

Cisco ASA firewall swap