Hello!
A very strange thing on mrtg occurs if one of our 1GBit uplink ports serves more than 100 MBit. See
Firmware-version: 12.1(22)EA4 - C2950-I6Q4L2-M Software: MRTG 2.10.13-1.2 on Debian Sarge
There's no packet loss or something else while mrtg/the counters is/are confused. Any suggestions?
crandler
On 15.11.2005 17:13 crandler wrote
Use 64-bit SNMP counters.
Arnold
Thanks. That's it.
For others with the same issue, cisco says: The original interface counters defined in MIB-2 are 32-bit counters. For a 10 Mbps interface, a 32-bit counter could theoretically wrap in
57 minutes. Avoiding discontinuities is easy with such a long period. But for 100 Mbps, the minimum theoretical wrap time is 5.7 minutes. For 1 Gbps interfaces, it falls to 34 seconds. Granted these times are for transmission of back-to-back full-sized packets, a theoretical ideal. Even so, the higher the interface speed, the harder it becomes to avoid missing a counter wrap. As a solution to this problem, SNMPv2 SMI defined a new object type -- counter64 -- for 64-bit counters. Therefore, there are several new 64-bit counters defined in the extension interface table (ifxTable) defined in RFC 1573 (later superceded by RFC 2233).on:
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