User`s guide

20 XgOS User’s Guide • September 2014
The Oracle Fabric Interconnect contains an embedded Subnet Manager (SM) that
manages the switching and pathing tables within the IB fabric. When there are
multiple SMs on a subnet, one SM will be the master SM through an election
algorithm. The remaining SMs become standby SMs. There is only one master SM
per subnet.
The master SM is a key element in initializing and configuring an IB subnet. The
master SM is elected as part of the initialization process for the subnet and is
responsible for the following:
■ Discovering the physical topology of the subnet
■ Assigning Local Identifiers (LIDs) to the end nodes, switches, and routers
■ Establishing possible paths among the end nodes
■ Sweeping the subnet, discovering topology changes and managing changes as
nodes are added and deleted.
The communication between the master SM and the SM agents, and among the SMs,
is performed with subnet management packets.
Note – If you prefer to use a 3rd-party SM (not the Oracle Fabric Interconnect), see
“OpenSM Decoupling” on page 244 for information on how to disable the SM.
Note – The IB specification is posted at
http://www.infinibandta.org/specs/register/publicspec/.
Syntax
Use the following CLI commands to display and manage InfiniBand port
information:
Example: Display the Fabric Ports
show fabric-port
show physical-server [<name>][*]
show fabric-port
-----------------------------------------------------------------
name chocolate
type hcaPort
descr