Is anyone doing large-scale RMON history collection presently? We're considering it for capacity and error monitoring, as history buckets allow for really trivial implementation of otherwise complex checks like "on any given port, I don't care about a 1000 errors in a bucket, but I do care about 10 errors in each of 3 consecutive buckets".
Most of the CCO notes seem to date back to when RMON was new and cool and how to turn it up on a cat5k. An efficient implementation would suggest that the switch collects existing interface counters every history bucket; presumably these will exhibit all of the usual platform-specific counter quirks? Is there any reason at all to be concerned about CPU/memory utilization? Obviously on most platforms I wouldn't think twice, but for example a large 3750 stack serious skews the ratio of ports to cpu/mem. We'd be looking at doing this indiscriminately across 6500's, 4500's and any mix of small DSBU switches (from 3750E's to some 3500XL's that refuse to die). _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
