Forum Discussion
NimbostratusVIP - MAC Address
Hi Experts,
what will be the MAC address of the Virtual IP address of the Virtual server, associated with a pool of servers?
Thanks- gseek
7 Replies
- nitass
Employee
if you do not configure mac masquerade, it is vlan mac address.
sol7214: Configuring MAC masquerade (9.x - 10.x)
http://support.f5.com/kb/en-us/solutions/public/7000/200/sol7214.html 
genseek_32178thank you for the response nitass.
mac masquerade is configured for the floating IP of a VLAN on a redundant bigip setup.
But sometimes, a virtual IP address may reside on a different, say VLAN A and the servers in the pool behind the VIP could be in another VLAN, say VLAN B. In this case, too, will the VIP MAC address be the mac masquerade addr of floating IP in VLAN A?- nitasswill the VIP MAC address be the mac masquerade addr of floating IP in VLAN A?yes
What_Lies_Bene1Cirrostratus
Where multiple VLANs are concerned the same rules apply but per VLAN, so the VS will have a different MAC for each VLAN it is listening/enabled on. ARP responses 'would' change per VLAN to reflect this but as the IP range could only exist on one VLAN or VLAN group, ARP will only be used where the VS address is in the same subnet as the Self IP for a VLAN, if any. For all others traffic would have to be directly routed to the device. It doesn't matter where the Pool Members are as the VS address is not used to communicate with them, the floating (if configured) or real Self IP of the egress VLAN is.
- genseek_32178thank you nitass and Steve.
We ve a VIP with with pool members behind the VIP showing status as below,
POOL MEMBER pool_A/10.2.201.1:http active,unchecked
+-> POOL MEMBER pool_A/10.2.201.9:http active,unchecked
+-> POOL MEMBER pool_A/10.2.201.7:http active,unchecked
+-> POOL MEMBER pool_A/10.2.201.8:http inactive,forced down
What is the meaning of "active, unchecked"? In this state, will the pool members process any traffic on port 80 if client sends some traffic request to the VIP? Bcoz, when we telnet to the VIP on port 80 intermittently ti says, listening and other times, filtered. - nitassWhat is the meaning of "active, unchecked"? it is unchecked because no health monitor is assigned to pool member.
will the pool members process any traffic on port 80 if client sends some traffic request to the VIP?yes
when we telnet to the VIP on port 80 intermittently ti says, listening and other times, filtered.i think you should run tcpdump to see what is going on. - genseek_32178thanks again nitass for the prompt response, will take the dump and verify and update back.
