Failure Condition

Having followed the excercises up to this point will have resulted in the creation of an active/active disaster recovery topology. An alternating response is received when querying www.example.com. From the command prompt in the Jumpbox type “dig www.example.com”. Repeat dig commands and observe the TTL counting down.

Log into both the Active and the Standby ADC device in SITE1 and disable all interfaces.

https://bigip1.site1.example.com/tmui/Control/jspmap/tmui/locallb/network/interface/list.jsp

https://bigip2.site1.example.com/tmui/Control/jspmap/tmui/locallb/network/interface/list.jsp

TMSH command to run on bigip1.site1 and bigip2.site1 to simulate a network failure

TMSH

tmsh modify interface all disabled

Log into gtm1.site1 and observe the status of “Server” objects:

https://gtm1.site1.example.com/tmui/Control/jspmap/tmui/globallb/server/list.jsp

TMSH

tmsh show gtm server

Log into bigip1.site1 and bigip2.site1 and enable all interfaces

https://bigip1.site1.example.com/tmui/Control/jspmap/tmui/locallb/network/interface/list.jsp

https://bigip2.site1.example.com/tmui/Control/jspmap/tmui/locallb/network/interface/list.jsp

TMSH

tmsh modify interface all enabled