Configuring And Enabling Fcfw - Brocade Communications Systems StoreFabric SN6500B Documentation Update

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Documentation updates for Fabric OS v6.4.0 and v6.4.1
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Unsupported configurations for FCFW
Multiple equal-cost configurations are not natively supported by FCFW. In some cases, traffic
isolation zoning may be used to support multiple equal-cost configurations. Refer to the Fabric OS
Administrator's Guide for more information about traffic isolation zoning.

Configuring and enabling FCFW

Take the following steps to configure and enable FCFW.
1. Create a zone configuration to filter FCFW flows. FCFW flows are configured by creating a zone
2. Ensure that FCFW is enabled on the switch or blade using the fastwritecfg - -show command. If
3. Disable the FC ports that you intend to use for FCFW using the portdisable command.
4. Enable FCFW using the portcfg fastwrite command on the ports you just disabled. The
5. Enable the zoning configuration established in step 1.
6. Enable the ports that were disabled in step 3.
7.
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FC ports on both the 7500 switch and the FR4-18i blade are organized into two groups. Ports
0-7 form one group, and ports 8-15 form the other. A maximum of four ports in each group may
be configured as FCFW.
The maximum bandwidth available for FCFW is 4 Gbps per group. This bandwidth is shared by
all write flows.
Host initiators and target devices must be directly connected to the 7500 switch or FR4-18i
blade on their respective ends of the ISL. FCFW must be configured and enabled for the ports
on both the ends of the flow. Mismatch of the configuration results in I/O failure.
name with an fcacc token as a prefix. For LSAN configuration, use lsan_fcacc as a prefix, as
shown in the following example..
#zonecreate fcacc_myzone1, "initiator-wwn; target-wwn"
#zonecreate LSAN_fcacc_myzone2, "initiator-wwn; target1-wwn"
#cfgcreate mycfg, "fcacc_myzone1; LSAN_fcacc_myzone2"
#cfgenable mycfg
Fastwrite is not enabled, enable FCFW using the fastwritecfg command. The following example
enables FCFW for a blade in slot 3.
switch:admin> fastwritecfg --enable 3
!!!! WARNING !!!!
Enabling FC Fastwrite will require powering off and back on the and it may
take upto 5 minutes. For non bladed system, the switch will be rebooted.
Data traffic will be disrupted.
Continue
following example enables FCFW on FC port 3 on a blade in slot 3.
portcfg fastwrite 3/3 --enable
Repeat the steps for the blade or switch on the other end of the FCFW path.
(Y,y,N,n): [ n] y
Fabric OS Documentation Updates
53-1002063-09