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Troubleshooting a Link Aggregation Failure Troubleshooting Link Aggregation
page 7-4 OmniSwitch Troubleshooting Guide September 2005
The show linkagg port CLI command followed by the slot and port number will display the port and link
state as well as if it is the primary port. (See the samples below.) If the operational or administrative state
is down and the port is primary, this indicates a software problem.
-> show linkagg port 7/1
Static Aggregable Port
SNMP Id : 7001,
Slot/Port : 7/1,
Administrative State : ENABLED,
Operational State : UP,
Port State : ATTACHED,
Link State : UP,
Selected Agg Number : 3,
Port position in the aggregate: 0,
Primary port : YES
-> show linkagg 2
Dynamic Aggregate
SNMP Id : 40000002,
Aggregate Number : 2,
SNMP Descriptor : Dynamic Aggregate Number 2 ref 40000002 size 8,
Name : ,
Admin State : ENABLED,
Operational State : UP,
Aggregate Size : 8,
Number of Selected Ports : 2,
Number of Reserved Ports : 2,
Number of Attached Ports : 2,
Primary Port : 8/1
LACP
MACAddress : [00:d0:95:6b:54:0c],
Actor System Id : [00:00:00:00:00:00],
Actor System Priority : 0,
Actor Admin Key : 0,
Actor Oper Key : 2,
Partner System Id : [00:00:00:00:00:00],
Partner System Priority : 0,
Partner Admin Key : 0,
Partner Oper Key : 2
Verify spanning tree on the virtual port that represents the link aggregate is in forwarding with the show
spantree command. Note the aggregate group will be displayed as 0/aggregate ID.
-> show spantree 10 ports
Spanning Tree Port Summary for Vlan 10
Adm Oper Man. Path Desig Fw Prim. Adm Op
Port Pri St St mode Cost Cost Role Tx Port Cnx Cnx Desig Bridge ID
-----+---+---+----+----+-----+-----+----+---+-----+---+---+---------------------
- 5/1 7 ENA FORW No 19 3 DESG 1 5/1 AUT PTP C350-
00:d0:95:79:62:8a
0/3 7 ENA FORW No 3 0 ROOT 1 0/3 AUT PTP 8000-00:d0:95:88:67:ca
If there are still connectivity problems across the aggregate link, make sure to check basic Ethernet
connectivity including spanning tree