uptimes and timestamps
bierman@davidsys.com Wed, 12 August 1992 22:18 UTC
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Date: Wed, 12 Aug 1992 15:01:29 -0800
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From: bierman@davidsys.com
Subject: uptimes and timestamps
To: chassismib@cs.utk.edu
X-Vms-Mail-To: UUCP%"chassismib@cs.utk.edu"
The objects chasSlotLastChange and chasEntityTimeStamp are based on sysUpTime. The problem is that sysUpTime is defined as the time since the "network management portion" of the system was last re-initialized. There are devices (e.g. repeaters) that can operate without the presence of a management entity. Also, the hardware portion of a device may be reset independently of the management portion. We have been using a object called "chassisUpTime" in our agents for awhile, indicating the time power has been applied to the chassis. Objects such as a chassisSlotTimeStamp are relative to the chassisUpTime. This prevents the situation in which a hardware uptime (or timestamp) has to be reset when sysUpTime is reset. So I'm proposing this additional object: chasUpTime OBJECT-TYPE SYNTAX TimeTicks ACCESS read-only STATUS mandatory DESCRIPTION "The time (in hundredths of a second) that power has been applied to the chassis." ::= { chassis 5 } I realize that many vendors have been using sysUpTime in this way (I believe incorrectly). I would also propose that chasSlotLastChange and possibly chasEntityTimeStamp be relative to chasUpTime, not sysUpTime. --andy; bierman@davidsys.com
- uptimes and timestamps bierman