Broadcast Configuration - HP A7533A - Brocade 4Gb SAN Switch Base Administrator's Manual

In the FC router, use the command fcrbcastconfig to prevent interfabric forwarding of broadcast
frames of edge or backbone fabrics.
Using the fcrbcastconfig command, you can disable or enable the broadcast frame forwarding
option per FID (edge fabric or backbone fabric).
If you have an FID with a pre-existing IPFC data session that you want to disable then the IPFC traffic across
the FCR may not stop even after disabling the broadcasting to some edge fabrics. When you disable the
IPFC traffic broadcast configuration it will take effect on the next ARP command. If there is an active IPFC
data session through the FCR, disabling the FID on the FCR, using the fcrbcastconfig command, would be
effective after clearing the ARP cache on the host of the IP devices forcing the IP devices to re-send ARP or
after the IP devices send the periodic ARP command. Clearing the ARP cache forces the IP devices to
re-send ARP or after the IP devices send the periodic ARP command.

Broadcast configuration

To enable broadcast frames across the FC router, the IP devices must be LSAN-zoned. By default, the edge
fabrics and the backbone fabric of the FC router have the broadcast frame receiving and forwarding
option enabled. Users with Admin and switchAdmin roles can change the broadcast configuration using
the fcrbcastconfig command. Thus multi-protocol devices can be configured to send broadcast frames
to edge fabrics but not to others. For example, broadcast frames can be routed or prevent routing from
edge-to-edge, backbone-to-edge, and edge-to-backbone fabrics.
Broadcast zoning can be used in an edge fabric to share IP devices. Only edge fabrics in the broadcast
zone will be able to receive broadcast frames. In v5.1.x and v5.2.x where broadcast zones are not
implemented, all the devices will be able to receive the broadcast packet. You can use the
fcrbcastconfig command to set edge fabrics to receive broadcast frames. On switches with an earlier
Fabric OS version than v5.3.0 that do not support broadcast zoning, the fcrbcastconfig command
sets up inter-fabric broadcast frame forwarding on the FC router and prevents inter-fabric forwarding of
broadcast frames to the switches running older versions of firmware.
Between FC routers, the broadcast frame is sent through the FC router protocol frame. The
fcrbcastconfig command allows you to configure VEX_ and EX_Ports to enable or disable broadcast
capability. The device that originates the broadcast frame must be imported in order to broadcast over FC
routers.
NOTE: fcrbcastconfig configuration information does not propagate to other FCRs in the backbone
fabric. If you configure one FCR you must configure all the FCRs with same configuration information
across all FCRs in the fabrics.
To display the current broadcast zone configuration:
1. Log in to the switch as admin.
2. Type the following command:
fcr:admin> fcrbcastconfig --show
This command displays only the FIDs that have the broadcast frame option disabled. The FIDs that are
not listed have the broadcast frame option enabled.
To enable the broadcast frame forwarding:
1. Log in to the switch as admin.
2. Type the following command:
fcr:admin> fcrbcastconfig --enable -f <fabric id>
where
<fabric id>
turned on by default. This command enables the broadcast frame forwarding option for an FID (edge
or backbone fabric).
To disable a broadcast zone forwarding:
1. Log in to the switch as admin.
238 Using the FC-FC routing service
is the specified FID where you want to enable frame forwarding. This feature is