HP StorageWorks 2.64 Director Switch - Manual (Page 98)

Configuring the director 98
• Blocked (Open Systems management style only)—Placing a check mark in the check boxes of
this column blocks the operation of the port.
To block ports in FICON management style, use the Configure Addresses dialog box.
• 10-100Km—This column is for extended distance buffering. You can enable extended distance
for a port even if it is not an extended distance port. However, enabling extended distance
buffering on a port disables the ability for the port to send broadcast traffic. When you select
this option, the port can support up to 60 buffer-to-buffer credits (BB_Credits) to handle link
distances up to 100 km. If this option is not enabled, the port uses the BB_Credit (1–60)
configured through the Configure Fabric Parameters dialog box.
If a device is connected and logged in to the fabric when extended distance is enabled or
disabled on the corresponding port, the switch will send OLS for 5 ms to force the device to log
in again and obtain the new BB_Credit value set for the port.
Click Activate to display the 10-100Km confiration dialog box.
NOTE: If a switch supports BB credits by port, an RX BB Credits column replaces the 10-100Km
column.
• RX BB Credit—If a director supports BB credits by port, this column displays instead of the
10-100 Km column. Minimum and maximum allowable port BB credit values vary by switch. If
an invalid value is entered, an Invalid RX BB Credit error message displays. The BB credit value
cannot be changed unless the port is offline. The BB Credit value is validated as entered. Click
Activate to display the RX-BB Credit Confirmation box.
In addition to the maximum BB credit limit per port, the total BB credits allocated to all ports
cannot exceed the buffer pool size.
NOTE: Only 24-Port switches have a switch-wide buffer pool. The Configure Ports dialog box
displays the total and available buffers at the bottom of the dialog box. When information is
changed in the RX BB Credit column, this information also updates. If information is entered that
exceeds the buffer pool and Activate is clicked, an error message displays. Also, ports for the
24-Port switches can be individually configured between 2-12, with a total number of port credits
of 150.
Right-clicking in the RX-BB Credit column displays a RX BB Credits dialog box. For switches
without buffer pools, this dialog box allows you to Set all. Set all sets all ports to a single value
or Set all to maximum which set all ports to a maximum BB credit value. For switches with
buffer pools, this dialog box allows you to Set all, which sets all ports to a single value or to
Distribute which evenly distributes the pool buffers among all ports. Clicking OK changes the
values in the Configure Port dialog box. Clicking Activate changes the values on the Switch.
Clicking Set all displays the Set All RX BB Credits dialog box. Entering a value for RX BB Credit
and clicking OK propagates the value to all ports on the Configure Ports dialog box. If an
invalid value is entered, a message dialog box displays.