>>>>> On Thu, 29 Jul 2004 14:37:12 +0200, Thomas Anders <[EMAIL PROTECTED]> said:

>> Net-SNMP uses a combination of time and random number values to
>> seed the engineID.  Doing it any other way (like the common IP
>> address way) is generally bad practice.

Thomas> Are you willing to elaborate on the latter statement? The
Thomas> SnmpEngineID TC from RFC3411 defines and allows for lots of
Thomas> those "other ways", provided that they result in a value that
Thomas> will be unique in the agent's administrative domain. AFAICS
Thomas> this may well be the case with appropriate use of those "other
Thomas> ways".

The last statement is intended to say that basing an engineID on an IP
address is a stupid thing to do, which is the standard way that most
agents do things.  IP addresses change.  Thus when they do, either the
agent reinitializes its user database and thus no previous users are
valid (not common) or they keep the old engineID (A) defined by the
old IP address which may conflict with another machine that generated
a new engineID (B) based its current IP address which might happen to
be the same as the old engineID (A == B), which is more common.  In
either case you've just hosed the management station by reassigning a
box to a new address.

MAC addresses are better, as they're typically unique.  However, even
those can typically be assigned by the user in common interfaces these
days.

-- 
Wes Hardaker
Sparta


-------------------------------------------------------
This SF.Net email is sponsored by OSTG. Have you noticed the changes on
Linux.com, ITManagersJournal and NewsForge in the past few weeks? Now,
one more big change to announce. We are now OSTG- Open Source Technology
Group. Come see the changes on the new OSTG site. www.ostg.com
_______________________________________________
Net-snmp-users mailing list
[EMAIL PROTECTED]
Please see the following page to unsubscribe or change other options:
https://lists.sourceforge.net/lists/listinfo/net-snmp-users

Reply via email to