redundancy for celerra connection to network

Currently our Celerra is connected to one Cisco 3750G 24 port switch.  Our VMWare (3) servers are also connected to this.  There's 3 VLANs,

1 LAN

10 SAN

20 DMZ

This switch is trunked to the core.

Now we added a second switch.  Any best practices how to make it redundant, so if one switch goes down?

on both sides in the back of the celerra there's

cge0, cge1, cge2, cge3        -        cge0, cge1, cge2, cge3

Any link to documents would be helpful.

Storage traffic is on its on vlan.  The VMWare ESX hosts have interfaces on the storage vlan to talk to the celerra via NFS.