WS-C3560X-24 needs to be connected with another WS-C3560X-24 core layer 3 sitch.

Question

I got new task moving WS-3560X24 port layer 3 core switch from one branch to be moved  to my  branch and connect WS3560 layer 3 core switch my site network. Both core switch has got 3-4 cisco 2960 switch underneath and lots of vlan offcourse. I am thinking about creating etherchannel between these two switch.
Any suggession and advise will be hightly appreciated.
Thanks in advance.

Answer 1

So today you have one core 3560X switch with layer 3 interfaces for all the VLANs which go out to your Access layer 2960 switches - correct?
We would typically see a core (Cisco would call it "distribution" layer in such a case becasue they don't consider the 3560 full-featured or powerful enough to call it a "core" switch) made of of dual switches connected with a trunk port (may be multiple physical ports in a port channel for higher availability and throughput). Each access switch has trunk port connections to core switch #1 and #2. At layer 3, core switch #1 and #2 setup hsrp groups for all VLAN interfaces.
That's the high level approach that most closely resembles a reference architecture. Have a look at the "LAN Baseline Architecture Overview-Branch Office Network" document for more information.