91
Configure the LID Mask Control (LMC)
The Subnet Manager (SM) allows an administrator to define the LMC (Local Identifier Mask Control)
value per subnet. Once the LMC value has been assigned, the SM routes different paths for each LID
(an address assigned to a port) that is associated with the same host port.
The default LMC is 0.
View InfiniBand Paths
The following command can be used to help you visualize the path between two end points. The
endpoints are specified by Local Identifiers (LIDs):
1. Locate the Source LID and Destination LID.
2. Enter
show ib sm switch-route subnet-prefix
fe:80:00:00:00:00:00:00
src-lid
<
source-lid
>
dst-lid
<
destination-lid
>.
The following example displays a summary of the SM route switch element table for one source
and destination.
Example
Topspin-90> show ib sm switch-route subnet-prefix
fe:80:00:00:00:00:00:00 src-lid dst-lid 9
===============================================================
Summary of SM Route Switch Element Table by Subnet w/ Src and Dest LID
===============================================================
subnet-prefix : fe:80:00:00:00:00:00:00
src-lid : 1
dst-lid : 1
last-change : Tue Jan 27 22:51:56 2004
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