HP Fabric Clustering System HP-UX Administrator's Guide, March 2008

the subnet management agent is done using the common management datagram (MAD) message
structure. This structure entails the passing of subnet management packets (SMP).
There is a limit to the number of MAD packets that may be queued for a single file descriptor.
Once the queue reaches its maximum length (currently set to 8), new packets are dropped. This
prevents “livelock” in the situation where new MADs arrive faster than they can be processed.
The subnet management agent receives and transmits subnet management packets to and from
the subnet manager. The subnet management packets never extend beyond their respective local
InfiniBand subnet. Also, SMPs always use Virtual Lane 15 (VL15) and are exclusively addressed
to Queue Pair 0 (QP0).
Regarding Partitions: Partitions are created, and then ports are added to those Partitions to
enforce isolation. For more information regarding creating Partitions.
NOTE: HP recommends that the default partition be used for the cluster.
You can choose your own p_key values, or you can simply choose your values from the list in
the following table.”
Table B-47 Acceptable P_Key Values
00:1100:01
00:1200:02
00:1300:03
00:1400:04
00:1500:05
00:1600:06
00:1700:07
00:1800:08
00:1900:09
00:2000:10
Examples: The following example defines a subnet manager, or redefines the existing subnet
manager, with the specified priority, sm-key, response-timeout, and sweep-interval.
HP-IB(config)# ib sm subnet-prefix fe:80:00:00:00:00:00:00 priority 10
sm-key 00:00:00:00:00:00:00:00 response-timeout 2000 sweep-interval 10
The following example removes a specified subnet manager.
HP-IB(config)# no ib sm subnet-prefix fe:80:00:00:00:00:00:00
The following example resets the response-timeout value for the specified subnet manager back
to its default value.
HP-IB(config)# no ib sm subnet-prefix fe:80:00:00:00:00:00:00 no response-timeout
The following example creates a Partition, and adds .
HP-IB(config)# ib sm subnet-prefix fe:80:00:00:00:00:00:00 p_key 00:02
partition-member 00:00:2c:90:01:1a:c8:00 full-member
Defaults: You may enter this command without arguments to add a subnet manager with
default values.
The default are:
sm-key is 00:00:00:00:00:00:00:00
priority is 0
sweep-interval is 10 seconds
184 Switch Command Line Interface