Unstable with Virtual Servers when running Active/Standby F5 Big-IP LTM 3600 ver 11.1

Hi all,

 

 

Our system have two F5 Big-IP LTM 3600 running under TMOS ver 11.1 with Active/Standby Mode. They have information as followings:

 

 

1. F5_01:

 

VLAN DMZ (Internal) Self IP: 10.5.255.252/16

 

VLAN DMZ (Internal) Floating IP: 10.5.255.254/16

 

VLAN LTM (External) Self IP: 10.6.255.252/16

 

VLAN LTM (External) Floating IP: 10.6.255.254/16

 

 

2. F5_02:

 

VLAN DMZ (Internal) Self IP: 10.5.255.253/16

 

VLAN DMZ (Internal) Floating IP: 10.5.255.254/16

 

VLAN LTM (External) Self IP: 10.6.255.253/16

 

VLAN LTM (External) Floating IP: 10.6.255.254/16

 

 

In additional, we have the the Virtual Servers: 10.6.1.10/16 attaches to the Pool that is included 06 web members port 8080 (10.5.1.61/16 -> 10.5.1.67/16). Of course, the Gateway for each web member is 10.5.255.254/16 (Floating IP for VLAN DMZ).

 

 

But now, when the Client access to the Virtual Servers: 10.6.1.10, it's very unstable (sometimes run and sometime can't).

 

 

The following process:

 

1. Accessable with 10.6.1.10 -> this mean can ping 10.6.1.10 from outside.

 

2. Inaccessable with 10.6.1.10 -> this mean can't ping 10.6.1.10 from outside.

 

 

So we need from your support to solve this issues.

 

 

Best Regards,

 

 

Trungleon