Hello Prakash,I wish you a happy new year.Thanks for your advice, but unfortunately it seems that most of my switches doesn't support this mib.Frank.

Dear R-Warnecke,I'm very interested in even "reading" the duplex-mode of my switch-ports. I tried snmpwalk berl-sw01-1 xxxxxxx .1.3.6.1.2.1.26, but i get no reply, probably the switch doesn't support the "mau-mib"? snmpwalk with other oids works fine...