HP A7533A - Brocade 4Gb SAN Switch Base Administrator's Manual page 238

To set and display the router port cost
1. Disable any port on which you want to set the router port cost.
2. Enable admin for the EX_Port/VEX_Port with portCfgExport or portCfgVexport commands.
3. Enter the fcrRouterPortCost command to display the router port cost per EX_Port.
switch:admin> fcrrouterportcost
Port
------------------------
7/3
7/4
7/9
7/10
7/13
10/0
You can also use the fcrRouteShow command to display the router port cost.
4. Enter the fcrRouterPortCost command with a port and slot number, to display the router port cost
for a single EX_Port.
switch:admin_06> fcrrouterportcost 7/10
Port
------------------------
7/10
5. Enter the fcrRouterPortCost command with a port and slot number and a specific cost, to set the
router port cost for a single EX_Port.
switch:admin_06> fcrrouterportcost 7/10 10000
Enter the fcrRouterPortCost command, to set the cost of the EX_Port back to the default.
6.
switch:admin_06> fcrrouterportcost 7/10 0
Upgrade, downgrade, and HA considerations
• For HA, the router port cost is synchronized to the standby CP.
• When upgrading the router switch from a prior Fabric OS version to Fabric OS v5.2.0 or later, during
warm recovery, if EX_Port is online, the default port cost is used.
• When downgrading the router switch from Fabric OS v5.2.0 or later to a prior Fabric OS version that
does not support router port cost, the port configuration file retains the router port cost values. However,
they are not used by the legacy Fabric OS.
• Legacy routers in the backbone fabric program all the router ports without considering router port cost.
Fabric OS v5.2.0 or later considers the legacy router port cost as 1000 for both EX or VEX_Ports.
Port cost considerations
The router port cost has the following considerations:
• Router port sets are defined as follows:
• 0-7 and FCIP Tunnel 16-23
• 8- 1 5 and FCIP Tunnel 24-31
More than two router port sets can exist in a 4/256 Director with two B-Series MP Router blades.
• The router port cost does not help distinguish one IFL (or EX- and VEX_Port link) from another, if all the
IFLs are connected to the same port set. Therefore, if you connect IFL1 and IFL2 to the same edge fabric
in port set 0–7 and then configure them to different router port costs, traffic is still balanced across all
the IFLs in the same port set.
• Use proper SAN design guidelines to connect the IFLs to different port sets for effective router port cost
use. For example, if both a low speed VEX_Port and a high-speed EX_Port are going to the same edge
fabric, connect the lower router cost IFLs to a separate port group (for example ports 0–7) than the
240 Using the FC-FC routing service
Cost
1000
1000
1000
1000
1000
1000
Cost
1000