Re: Byte Counters on Ciscos

Cisco stores them as 32 bits, but SNMP also retrieves them as 32 bits. HP has a proprietary MIB & impl. for its Lanprobes & RMON s/w for HP workstations, which is 64 bits wide. These are the only devices I know of that store more than 32 bits, and have accurate counts of bytes over a long period of time.

Actually, I've seen some other equipment store more than 32 bits... and it's Cisco gear! Catalyst 1924/2820, to be exact. But the implementation is different. There are two variables, like swPortTxTotalOctets and swPortTxTotalOctetsWraps. The formula to get the actual byte count is, of course, (swPortTxTotalOctetsWraps << 32) | swPortTxTotalOctets -Phil