Management and Configuration Guide K/KA/KB.15.15

Example 85 Example of LACP peer information
(HP_Switch_name#) show lacp peer
LACP Peer Information.
System ID: 001871-b98500
Local Local Port Oper LACP Tx
Port Trunk System ID Port Priority Key Mode Timer
------ ------ -------------- ----- --------- ------- -------- -----
A2 A2 123456-654321 2 0 100 Passive Fast
A3 A3 234567-456789 3 0 100 Passive Fast
Viewing LACP counters
Use the show lacp counters command to display statistical information about LACP ports.
NOTE: Data traffic can be dynamically redistributed in port channels. This may occur when a
link is added or removed, or there is a change in load-balancing. Traffic that is redistributed in
the middle of a traffic flow could potentially cause mis-ordered data packets.
LACP uses the marker protocol to prevent data packets from being duplicated or reordered due
to redistribution. Marker PDUs are sent on each port-channel link. The remote system responds to
the marker PDU by sending a marker responder when it has received all the frames received on
this link prior to the marker PDU. When the marker responders are received by the local system
on all member links of the port channel, the local system can redistribute the packets in the traffic
flow correctly.
For the switches covered in this guide, the marker BPDUs are not initiated, only forwarded when
received, resulting in the Marker fields in the output usually displaying zeros.
Example 86 Example of LACP counters output
(HP_Switch_name#) show lacp counters
LACP Port Counters.
LACP LACP Marker Marker Marker Marker
Port Trunk PDUs Tx PDUs Rx Req. Tx Req. Rx Resp. Tx Resp. Rx Error
---- ------ --------- --------- -------- -------- -------- -------- --------
A2 A2 1234 1234 0 0 0 0 0
A3 A3 1234 1234 0 0 0 0 0
Trunk group operation using LACP
The switch can automatically configure a dynamic LACP trunk group, or you can manually configure
a static LACP trunk group.
NOTE: LACP requires full-duplex (FDx) links of the same media type (10/100Base-T, 100FX,
and so on) and the same speed and enforces speed and duplex conformance across a trunk group.
For most installations, HP Switch recommends that you leave the port mode settings at Auto (the
default.) LACP also operates with Auto-10, Auto-100, and Auto-1000 (if negotiation selects
FDx), and 10FDx, 100FDx, and 1000FDx settings.
152 Port Trunking