HP Virtual Connect to 4500-X VSS

Question

Is it possible to create a shared uplink set between 2 HP VC FlexFabric 10Gb/24-Port Module connecting to 2 Cisco 4500-Xs in VSS (total of 4 links)?  Traditionally I've been created 1 SUS for each VC going into Cisco Nexus 5Ks.  Each SUS is active/active and then within VMware each vSwitch has both SUS links.  This works well, but I'd like to know if there's a better way to be doing things.

Answer 1

Hi,
some info.
PAgP is supported in all platforms except the Cisco Catalyst 37xx stack configuration in which cross-stack EtherChannel (LACP) is required to have MEC-connectivity with the VSS. Because cross-stack EtherChannel does not support PAgP, it cannot use enhanced PAgP for dual-active detection. A common approach to resolve this gap in support is to use two EtherChannel links from the same stack member. This solution is a non-optimal design choice because it creates a single point-of-failure. If a stack member containing that EtherChannel fails, the whole connectivity from the stack fails. To resolve this single point-of-failure problem, you can put two dual-link EtherChannel group, each on separate stack member connected to VSS; however, it will create a looped topology. The loop-free topology requires a single EtherChannel bundle to be diversified over multiple members which in turn requires LACP.