Ubtagged VLAN with two interfaces and ARP
Hi,
I am trying to understand how this kind of setup is managing MAC address-interface bond.
Scenario:
VLAN100 with interface 1.1 and 1.2 assigned
Interface 1.1 connected to switch1, to switch1 node1 and node2 servers connected
Interface 1.2 connected to switch2, to switch2 node3 and node4 servers connected
Pool1 created with nodes 1-4
Virtual created with Pool1
According to all my tests as well as SOL14513 all L3 traffic is using VLAN MAC not Interface MAC (seems logical as same IPs are available via both interfaces).
Now we trying to ping node1 - I assume that ARP Request (Broadcast dst MAC) is send via both interfaces. ARP Reply returns only via interface 1.1 as node1 is connected only to switch1.
So far so good, but how BIG-IP stores that packet for node1 should be only send via interface 1.1? I can't see Interface column in Network>ARP>Dynamic List (GUI) or when issuing tmsh show net arp. There is no entry at all in FDB - tmsh list net fdb vlan VLAN100 all-properties.
Only info is to which VLAN given MAC address belongs. That's fine if we have one interface/trunk VLAN but seems to be not enough when there are more than two interfaces in VLAN.
How BIG-IP can send packets only via interface where dst MAC was reported?
Is that mean that all packets destined for IP that belongs to given VLAN are send all the time via all ports assigned to VLAN?
Piotr