HP ProCurve 2520 Figure 12-11.Blocked Ports with LACP

Port Trunking

Trunk Group Operation Using LACP

Blocked Ports with Older Devices. Some older devices are limited to four ports in a trunk. When eight LACP-enabled ports are connected to one of these older devices, four ports connect, but the other four ports are blocked. The LACP status of the blocked ports is shown as “Failure”.

If one of the other ports becomes disabled, a blocked port will replace it (Port Status becomes “Up”). When the other port becomes active again, the replace­ ment port goes back to blocked (Port Status is “Blocked”). It can take a few seconds for the switch to discover the current status of the ports.

ProCurve(eth-1-8)# show lacp
		LACP
PORT	LACP	TRUNK	PORT	LACP	LACP
NUMB	ENABLED	GROUP	STATUS	PARTNER	STATUS
----	-------	-------	-------	-------	-------
1	Active	Dyn1	Up	Yes	Success
2	Active	Dyn1	Up	Yes	Success
3	Active	Dyn1	Up	Yes	Success
4	Active	Dyn1	Up	Yes	Success
5	Active	Dyn1	Blocked	Yes	Failure
6	Active	Dyn1	Blocked	Yes	Failure

Figure 12-11. Blocked Ports with LACP

12-24