On 24/04/07, Nguyen Huy Ha <[EMAIL PROTECTED]> wrote: > > Hi, Is it possible to get timestamps of responses right when they leave > > their agent, and how?
You could turn on packet dumps, which by default would get logged in the agent's syslog - complete with timestamp. > It should be impossible since there is no timestamp field in SNMP/UDP/IP > stack. It's certainly true that timestamps are not part of the SNMP protocol. This is deliberate - since SNMP may well be implemented on fairly low-level hardware, where they may not be any form of externally reliable timestamp. That's why the fundamental time measurement for most MIBs is 'sysUpTime' - the length of time that the agent has been up and running. This is purely self-contained, and doesn't rely on any external clock. > I was just wondering that the counter values that we get from agents > would be more precise if we have also the timestamp at the agents since it > also takes a while for responses from agents to get to their manager. Quite honestly, I suspect that delays in retrieving the counter values from the underlying subsystems would be of equal significance to network delays. Even more so when it comes to any internal caching of data within the agent. All that a timestamp would give you would be the time that a response was sent - which is not necessarily the time that the individual counters were actually sampled. Dave ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Net-snmp-coders mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
