Users Guide

490 | Link Aggregation Control Protocol Dell PowerConnect ArubaOS 5.0 | [User Guide
1. Enable LACP and configure the per-port specific LACP. The group number range is 0 to 7.
lacp group <group_number> mode {active | passive}
z Active mode—the interface is in active negotiating state. LACP runs on any link that is configured to be in
the active state. The port in an active mode also automatically initiates negotiations with other ports by
initiating LACP packets.
z Passive mode—the interface is not in an active negotiating state. LACP runs on any link that is configured
in a passive state. The port in a passive mode responds to negotiations requests from other ports that are in
an active state. Ports in passive state respond to LACP packets.
2. Set the timeout for the LACP session. The timeout value is the amount of time that a port-channel interface
waits for a LACPDU from the remote system before terminating the LACP session. The default time out
value is long (90 seconds); short is 3 seconds
lacp timeout {long | short}
3. Set the port priority.
lacp port-priority <priority_value>
The higher the priority value the lower the priority. Range is 1 to 65535 and default is 255.
4. View your LACP configuration.
The port uses the group number +1 as the “actor admin key”. By default, all the ports use the long timeout
value (90 seconds).
(TechPubs)#show lacp 0 neighbor
Flags: S - Device is requesting Slow LACPDUs
F - Device is requesting fast LACPDUs
A - Device is in active mode P - Device is in passive mode
Partner's information
---------------------
Port Flags Pri OperKey State Num Dev Id
---- ----- ---- ------- ----- ---- ----------------
FE 1/1 SA 1 0x10 0x45 0x5 00:0b:86:51:1e:70
FE 1/2 SA 1 0x10 0x45 0x6 00:0b:86:51:1e:70
When a port in a LAG, is misconfigured (that is, the partner device is different than the other ports) or the
neighborship timesout or can not exchange LACPDUs with the partner, the port status is displayed as
“DOWN” (see the following example).
(TechPubs)#show lacp 0 internal
Flags: S - Device is requesting Slow LACPDUs
F - Device is requesting fast LACPDUs
A - Device is in active mode P - Device is in passive mode
Port Flags Pri AdminKey OperKey State Num Status
---- ----- ---- -------- -------- ----- ---- -------
FE 1/1 SA 1 0x1 0x1 0x45 0x2 DOWN
FE 1/2 SA 1 0x1 0x1 0x45 0x3 UP
Note: A port in a passive state cannot set up a port channel (LAG group) with another port in a passive state.