Dear all,
I´d like to get your experiences on measuring throughput on ATM PVCs using SNMP. Basically, we have GSR 12008 routers with IOS 12.0(21)S2, and Quad-port OC3c ATM linecards. PVCs were configured (one for each subinterface), with SCRs ranging from 4Mbps up to 38 Mbps. My question is: what snmp counters (and procedures) do you use to get *real* throughput on ATM PVCs? According to some Cisco docs, e.g http://www.cisco.com/en/US/tech/tk39/tk51/technologies_tech_note09186a0080093c9a.shtml subinterface MIB counters _ifInOctets and ifOutOctets_ do not include (deterministic) 5-byte cell header and (variable) AAL5 padding. Counters on CISCO-AAL5-MIB _cAal5VccInOctets and cAal5VccOutOctets_ seem to include AAL5 padding but I´m not sure, since some statements in the doc above sounded dubious to me :( Also, these are 32-bits counters leading to wrap problems with higher capacity PVCs. We´re looking for better measurements (or at least good estimatives) of our internal traffic on PVCs. Nowadays, we´ve been using subinterface counters but measured traffic is (obviously) lower than real traffic injected on telcos links. Any help would be really appreciated. Regards Raniery Pontes ::::::::::::::::::::::::: Network Operations Center (NOC) National Research Network - Brazil http://www.rnp.br/index_en.html -- Unsubscribe mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/mrtg FAQ http://faq.mrtg.org Homepage http://www.mrtg.org WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi
