Data center switch port requirements

Any network configured for Native mode receives incoming network traffic as untagged. Traffic transmitted out through the same network is always VLAN tagged (except for untagged uplink sets).

Ports for data center network switches that connect to the Virtual Connect (VC) interconnects must be configured as follows:
Spanning tree edge

Setting used for the VC interconnects to pass through network traffic.

VLAN trunk ports

Tagging to support the VLAN IDs included in the uplink set that connects to the switch port.

Link Aggregation Control Protocol (LACP)

Utility to configure multiple uplinks in an uplink set. These uplinks sets are connected to the same logical interconnect to the same data center switch. All the LACP ports are configured in the same LAG (Link Aggregation Group) to ensure that all the uplinks in the uplink set are active.

LACP timer

Set the frequency of control messages: short — every 1 second with a 3–second timeout; or long — every 30 seconds with a 90–second timeout.

NOTE:

Consider the type of network traffic if implementing an active/active and active/standby configuration.