From the SNA Service screen (Configure -> WAN/Data Services -> SNA), click on the SDLC Ports link at the top of the screen. You will see the SDLC Ports screen listing the current ports, like the following (example screens shown are from Passport 4460 units):
Click on Modify next to the port configuration you want to define. The Modify a SDLC Port screen is displayed with the current port parameters, like the following example:
You can change the Link Station Role to either Primary or Secondary. (Changing the Link Station Role to Secondary may require that you configure some additional parameters, such as the remote MAC and SAP address for switching.)
You can set the Topology to either Point to Point or to Multipoint.
You can enable or disable I-Frame Reject by selecting Yes or No.
Click on the Save button to save any changes you have made. Then, reset the unit. (Select Administration and System Reset from the navigation menu. Select Configuration as the Reset Type. Then, click on the Reset button.)
End of procedure.
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