Intel SBCEFCSW Hardware Maintenance Manual page 117

principal switch, will reassign any domain ID conflicts and establish the fabric. If you lock the
domain ID on a switch module and a domain ID conflict occurs, the switch module with the higher
WWN will be isolated as a separate fabric, and the Logged-in LEDs on both switch modules will
flash to show the affected ports. See "Set Config command" on page 24 for information about the
switch module keyword and the Domain ID Lock and Principal Priority parameters.
If you connect a new switch module to an existing fabric with its domain ID unlocked and a domain
conflict occurs, the new switch module will be isolated as a separate fabric. However, you can
remedy this by resetting the new switch module or taking it offline then back online. The principal
switch module will reassign the domain ID, and the switch will join the fabric.
NOTE
Domain ID reassignment is not reflected in zoning that is defined by domain ID and port
number pair. You must reconfigure zones that are affected by domain ID reassignment.
Broadcast support
Broadcast is supported by the switch module, which enables TCP/IP support. Broadcast is
implemented using the proposed standard specified in Multi-Switch Broadcast for FC-SW-3, T11
Presentation Number T11/02-031v0. The FSPF is used to set up a fabric spanning tree used in
transmission of broadcast frames. Broadcast frames are retransmitted on all ISLs indicated in the
spanning tree and all online F/FL_Ports. Broadcast zoning is supported with ACL and VPF hard
zones. When a broadcast frame is received, these hard zones are enforced at the F/FL_Port. If the
originator of the broadcast is in a hard zone, the frame is retransmitted on all online F/FL_Ports
within the hard zone. If the originator of the broadcast frame is not in a hard zone, the frame is
retransmitted on online F/FL_Ports that are not in a hard zone.
In-band management
In-band management is the ability to manage switch modules across interswitch links. If you disable
in-band management on a particular switch module, you can no longer communicate with that
switch module by means other than a direct Ethernet or serial connection.
Timeout values
The switch module timeout values determine the timeout values for all external ports on the switch.
Table 22 describes the switch module timeout parameters. R_A_TOV, R_T_TOV, or E_D_TOV
values must be the same for all switch modules in the fabric.
NOTE
Timeout values can be changed only if the switch module operational state is offline.
Table 22. Timeout values
Parameter
R_A_TOV
R_T_TOV
E_D_TOV
Intel® Server Switch Module SBCEFCSW
Description
Resource Allocation Timeout. Represents the maximum time a frame can be
delayed in the fabric and still be delivered. The default is 10000 milliseconds.
Receiver Transmitter Timeout. The amount of time that Sync can be lost
between two ports before Link Failure is detected. The default is 100
milliseconds.
Error Detect Timeout. Represents the maximum round trip time that an operation
between two N_Ports requires. The default is 2000 milliseconds.
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