HP Virtual Connect 1Gb Ethernet Cookbook

 PVST+ BPDUs
 Procurve Loop Protect frames
When the network loop protection feature is enabled, any probe frame or other supported loop detection frame
received on a downlink port is considered to be causing the network loop, and the port is disabled immediately
until an administrative action is taken. The administrative action involves resolving the loop condition and
clearing the loop protection error condition. The "loop detected" status on a port can be cleared by one of the
following administrative actions:
 Restart loop detection by issuing "reset" loop protection from the CLI or GUI
 Unassign all networks from the port in "loop detected" state
The SNMP agent supports trap generation when a loop condition is detected or cleared.
Virtual Connect provides the ability to enable or disable network loop protection. The feature is enabled by
default and applies to all VC-Enet modules in the domain. Network loops are detected and server ports can be
disabled even prior to any enclosure being imported.
A loop-protect reset command resets and restarts loop detection for all server ports in a “loop-detected” error
condition.
Figure 3 – Mac Cache Fail-over, IGMP Snooping and Network Loop Protection are all configurable under the
Ethernet Settings, Advanced settings, Other tab.