Backbone Fabric Ids; Assigning Backbone Fabric Ids - HP SN3000B Administrator's Manual

Backbone fabric IDs

If your configuration has only one backbone fabric, then you do not need to assign a backbone
fabric ID because the backbone fabric ID in this situation defaults to a value of 128. The default
backbone fabric ID is 1 if Virtual Fabrics is disabled.
All switches in a backbone fabric must have the same backbone fabric ID. You can configure the
backbone fabric ID using the fcrConfigure command. The backbone fabric ID must be unique from
the perspective of every attached edge fabric. Fabric ID changes made on a switch are not
propagated to other switches in the backbone fabric. Rather, the backbone fabric administrator is
responsible for making sure that all switches in the backbone have the same fabric ID. Because
fabric IDs are used heavily by the routing protocol between the Fibre Channel routers, using the
wrong fabric ID can affect both edge-to-edge and backbone-to-edge routing.
In addition to ensuring that the backbone fabric IDs are the same within the same backbone, you
must make sure that when two different backbones are connected to the same edge fabric, the
backbone fabric IDs are different, but the edge fabric ID should be the same. Configuration of two
backbones with the same backbone fabric ID that are connected to the same edge is invalid. In this
configuration, a RASLog message displays a warning about fabric ID overlap. When two backbone
fabrics are not connected to the same edge, they can have the same backbone fabric ID.
ATTENTION
In a multi-switch backbone fabric, modification of the FID within the backbone fabric will cause
disruption to local traffic.

Assigning backbone fabric IDs

1. Log in to the switch or Backbone.
2. Enter the switchDisable command if EX_Ports are online.
3. Enter the fosConfig
4. Enter the fcrConfigure command. At the prompt, enter the fabric ID, or press Enter to keep the
5. Verify the backbone fabric ID is different from that set for edge fabrics.
6. Enter the fosConfig
7.
Example
Fabric OS Administrator's Guide
53-1002446-01
FC-FC routing and fabric mode Top Talker monitors are not concurrently supported on 8-Gbps
platforms.
FC-FC routing and fabric mode Top Talker monitors are concurrently supported only on the
Brocade 6510 and on the Brocade DCX Backbone family with only 16-Gbps-capable ports.
disable fcr command to disable the FC-FC routing service.
--
The default state for the FCR is disabled.
current fabric ID, which is displayed in brackets.
Multiple FC routers attached to the same backbone fabric must have the same backbone
fabric ID.
enable fcr command.
--
Enter the switchEnable command.
switch:admin> switchdisable
switch:admin> fosconfig --disable fcr
Backbone fabric IDs
24
477