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6 – Managing Ports
Configuring Ports
59048-04 Rev. B 6-13
D
6.2.4
Changing Interoperability Credits
SANbox2 switches negotiate with other switches to resolve differences in the
number of port buffer credits. However, certain non-FC-SW-2-compliant switches
do not negotiate and will isolate when connected. To remedy this situation,
disconnect the switches, then reconfigure the SANbox2 E_Port to match the
number of port buffer credits on the other switch.
To change interoperability credits to permit operation with non-compliant switches,
do the following:
1. Determine the number of credits per port for the non-compliant switch:
If the credits per port is equal to 16, stop here – no changes are
needed.
If the credits per port is less than 16, proceed to step 2.
If the credits per port is greater than 16, you must extend credits for the
affected SANbox2 port to increase the number of credits to match that
of the non-standard switch. Refer to ”Extending Port Credits” on
page 6-14.
2. Select the SANbox2 switch ports in the faceplate display that are to serve as
links to the non-compliant switch.
3. Open the Port menu and select Port Properties.
4. In the Interop Credits field, enter the number of credits per port of the
non-compliant switch and click the OK button.
5. Connect the switches.
GL_Port Generic loop port - Self discovers as an F_Port, FL_Port, or an E_Port.
GL_Port is the default port type. A single device on a public loop will
attempt to configure as an F_Port first, then if that fails, as an FL_Port.
Donor Donor port - Allows buffer credits to be used by another port.
Note: Changing interop credits is necessary only for E_Ports that are
connected to non-FC-SW-2-compliant switches. Contact your
authorized maintenance provider for assistance in using this feature.
Table 6-9. Port Types (Continued)
State Description