Split Etherchannel Clusters

Question

I am looking for documentation on how to set up a series of "split Etherchannel" connections. I believe that this can be done with 802.3ad (LACP), but I need some specific documentation on the subject.
In a split LACP environment, an Etherchannel group is divided between two core switches and those core switches coordinate L2 communication via an Inter-Switch Trunk. I need to be able to "layer" this configuration to create a "cluster of clusters".
See the attached diagram.
I need to understand the proper Cisco terminology for this structure, and I need a reference to documentation on how to set it up using 6500 switches as the "core".
Thanks.

Answer 1

LACP is the IEEE, standarized, version of PAgP (ciscos proprietary portAggregationProtocol)
as with PAgP, LACP cannot be configured to create an etherChannel bundle of links divided across multiple switches.
a LACP channel must be comprised of ports with the same parameters, within a single chassis. you cannot create an etherChannel with 2 ports from SwitchA bundled with 2 ports from SwitchB to another endpoint(switch3).
see this link for more info on etherChannel configuration:
http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_guide_chapter09186a008007e6d3.html