We have two Cat6500 switches (core1 and core2)interconnected with trunk port. we also have a few of access switches to uplink to two core switches with trunk port.In core switch, we use SPT (RPVST)for L2 load balancing and HSRP for L3 load balancing according to odd and even Vlan. For example,root bridge of SPT and active VIP of HSRP of odd vlan are in the core1 Otherwise, it is in the Core2. My question is the traffic would go through two core switches when even vlan would try to access odd vlan,right?
There is a backup server in the odd vlan. we need backup all of data to that server during the midnight. I suspected I should see the huge traffic in two core switches when other hosts in the even vlan tried to access odd vlan. But so far the huge traffics I only saw were in core2 switch.
Please advice. I would apprecaite it!