Subject: Various SDLC, Ethernet questions

From: "David Miller (254-5752)" <[email-masked]>
Date: Tue, 11 May 93 10:53:23 EDT

Paul,

SDLC Circuit establishment is initiated in two ways:
  1) POR - if the partner MAC address is defined, then the DLSw
     will attempt to activate the device (SNRM/UA) and if successful,
     will send a CURFRAME to the partner.  When an ICRFRAME is received
     from the partner, DLSw will return a RESPACK and mark the circuit
     as established.
  2) On receipt of a CURFRAME - if a CURFRAME is received for the
     MAC address of the SDLC station, DLSw will attempt to activate the
     device (SNRM/UA) and if successful, will send an
     ICRFRAME to the partner.  The circuit will be established once the
     partner returns a RESPACK.

Choon,

DLSw does not yet support the spanning tree algorithm for Ethernet,
therefore it is a restriction that there can only be a single DLSw
attachment per set of interconnected Ethernet LANs.

David Miller ([email-masked])