With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoDlswSdlcLsTable
cisco Data Link Switching Sdlc Link Station Table
1.3.6.1.4.1.9.10.9.1.6.2
The table defines the virtual MAC addresses for those SDLC link stations that participate in data link switching.
Back to CISCO-DLSW-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoDlswSdlcLsTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.