Users Guide

Fabric OS Administrator’s Guide 619
53-1002920-02
EX_Port frame trunking configuration
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• In the following example, the ISL link cost of path 2 from FC router ID Domain 40 to FC
router Domain ID 30 is modified.
switch:admin>linkcost 10 5000
Interface10 (E_PORT)Cost 5000
• In the following example, the ISL link cost of path 2 from FC router Domain 30 to FC router
Domain 20 is modified.
switch:admin>linkcost 10 5000
Interface10 (E_PORT)Cost 5000
The modified cumulative link cost for path 2 is 10,000.
6. Enter the fcrConfigure --enable -shortestifl command to enable the shortest IFL mode in all the
FC routers in the backbone fabric.
switch:admin> fcrconfigure --enable -shortestifl
Shortest IFL path is enabled
7. Ente r th e fcrConfigure -show command to verify that the shortest IFL mode is enabled in all the
FC routers in the backbone fabric.
switch:admin> fcrconfigure --show
Backbone fabric ID: 128
Shortest IFL feature is enabled
8. Verify that the link cost of both the front domain and translate domain in the source edge
fabric have been modified using the lsDbShow command.
linkCnt = 2, flags = 0x0
LinkId = 160, out port = 160 rem port = 241, cost = 10001, costCnt = 0, type
= 1
LinkId = 161, out port = 161, rem port = 242, cost = 10000, costCnt = 0, type
= 1
EX_Port frame trunking configuration
You can configure EX_Ports to use frame-based trunking just as you do regular E_Ports. EX_Port
frame trunking support is designed to provide the best utilization and balance of frames
transmitted on each link between the FC router and the edge fabric. You should trunk all ports
connected to the same edge fabrics.
The FC router front domain has a higher node WWN—derived from the FC router—than that of the
edge fabric. Therefore, the FC router front domain initiates the trunking protocol on the EX_Port.
After initiation, the first port from the trunk group that comes online is designated as the master
port. The other ports that come online on the trunk group are considered the slave ports. Adding or
removing a slave port does not cause frame drop; however, removing a slave port causes the loss
of frames in transit.
The restrictions for EX_Port frame trunking are the same as for E_Ports—all the ports must be
adjacent to each other using the clearly marked groups on the front of the product.
ATTENTION
This feature should be enabled only if the entire configuration is running Fabric OS v5.2.0 or later.