L2 behavior?!

Hi,

I have scenario like this:

H---Asa----6k1-----6k2
                    ! !
                    ! !
                     2960sw
                           !
                           S

H-host in cloud (172.30.4.5), somewhere in distance network.y
Asa-running in transparent mode
Between 6k switches and 2960 is l2 domain (trunks).
6k switches running hsrp and 6k2 is active gw for vlans 500 and 514. It is
also root bridge for those vlans. Asa has one IP in vlan 500.
S is in vlan 514.
Problem is that 6k1 never learns mac address of S. When traffic comes from H
6k1 floods network with packets that should go to S. Only time when 6k1
learns S mac address is when you ping S from 6k1. After 480 sec is aging
time and mac address is cleared. As I understand 6k1 should forward packets
which has S as destanation to 6k2 as it is active gw for vlan 500 and then
6k2 should perform intervlan routing. Why flooding happens? Could asa make
some problems cause of transparent mode?

Regards

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Received on Tue Dec 28 2010 - 08:24:01 ART