HA pair setup - ping and arp issue

Hi,

 

 

I have problem to access self address of standby node of a LTM HA pair. I have below ip information. VLAN internal and external forms a VLAN group "bridge".

 

 

Example:

 

BIGIP1 (active)

 

- VLAN Internal

 

- Self Address: 192.168.1.1

 

- Floating Address: 192.168.1.10

 

- VLAN External

 

- Self Address: 192.168.68.1

 

- Floating Address: 192.168.68.88

 

 

BIGIP2 (standby)

 

- VLAN Internal

 

- Self Address: 192.168.1.2

 

- Floating Address: 192.168.1.10

 

- VLAN External

 

- Self Address: 192.168.68.2

 

- Floating Address: 192.168.68.88

 

 

When I ping 192.168.68.2 from my laptop (192.168.68.230), there is packet lost. When there is packet lost, I find that there is "echo request" shown in my tcpdump session in active node but not in standby node.

 

 

When I type "arp -a" in my laptop, I find 192.168.68.2 shows mac address of "external" interface but not "bridge" interface. (in node 2 ifconfig, external mac is 00:xx:xx:xx:xx:xx while bridge mac is 02:xx:xx:xx:xx:xx.

 

 

But sometimes node2 will response the echo request according to tcpdump session in node2.

 

 

Why is that? Is it normal? Why node1 will receive the echo request from my laptop?