we want to build a network with two switches that are interconnected. The goal is to be able to enable "teaming" on servers with two NICs, so that if one Switch fails, network connection is still available. We now dont now, whether we need "ENHANCED MULTILAYER IMAGE" when using Catalyst 3750 switches. Can anyone help? (we're are quiet new to the Cisco world). Thanks, Uli
Hsrp will be used to ensure that if one of your switches dies then the server can communicate via the other switch.
If the NIC on a server dies it will just use it's other NIC, but the active HSRP gateway will not change eg.
active HSRP gateway on SW1.
active NIC on SW1.
NIC fails, now active NIC is connected to SW2. Traffic goes from NIC to SW2 and if it is to be routed to a different vlan it is switched across your layer 2 trunk to active HSRP gateway on SW1.
As i say HSRP is for a switch dying rather than an server NIC.