We are implementing reserve server farm (SERVERFARM2 at the picture) and we want to connect the farms via the 10G link. 10G is the requirement.
I have a server vlan and several clients vlans. Inter vlan routing is provided by 3750G LAN switches, servers are also connected to them at the moment.
I have attached the desirable scheme.
There will be about 8km distance between serverfarms. Main traffic will be database replication traffic between two serverfarms.
I don't know what is better, to interconnect serverfarms using layer 2 domain (in this case the reserve will be provided by spanning tree) or to connect them via layer 3 links (reserve will be provided by OSPF)?
I have chosen WS-C3750E-24TD+
Cisco X2-10GB-LR cards as server farm switches.
Will they handle 10Gbps of traffic on the routed layer 3 ports? Or 10Gbps speeds are real only at layer 2 links?