From: Tyson Scott (tscott@ipexpert.com)
Date: Thu Jun 26 2008 - 11:30:01 ART
The first command is going to send messages in the form of traps. The
second is informs
Traps and Informs
Unsolicited (asynchronous) notifications can be generated as traps or
inform requests (informs). Traps are messages alerting the SNMP
manager to a condition on the network. Informs are traps that include
a request for confirmation of receipt from the SNMP manager.
Notifications can indicate improper user authentication, restarts, the
closing of a connection, loss of connection to a neighbor router, or
other significant events.
Traps are less reliable than informs because the receiver does not
send an acknowledgment when it receives a trap. The sender does not
know if the trap was received. An SNMP manager that receives an inform
acknowledges the message with an SNMP response protocol data unit
(PDU). If the sender never receives a response, the inform can be sent
again. Thus, informs are more likely to reach their intended
destination.
Traps are often preferred even though they are less reliable because
informs consume more resources in the router and in the network.
Unlike a trap, which is discarded as soon as it is sent, an inform
must be held in memory until a response is received or the request
times out. Also, traps are sent only once, whereas an inform may be
resent several times. The retries increase traffic and contribute to
higher overhead on the network. Use of traps and informs requires a
trade-off between reliability and resources. If it is important that
the SNMP manager receives every notification, use informs, but if
traffic volume or memory usage are concerns and receipt of every
notification is not required, use traps.
On Thu, Jun 26, 2008 at 9:39 AM, ccie <ccie@just-horizon.com> wrote:
> Hi experts,
>
> Is there any difference between these two commands once enabling trap on my
> router?
>
>
>
> R1(config)#snmp-server host 150.100.2.252 traps CISCO
>
> Vs.
>
> R1(config)#snmp-server host 150.100.2.252 CISCO
>
>
>
> Regards,
>
> Amin
>
>
> _______________________________________________________________________
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-- Tyson Scott - CCIE #13513 R&S and Security Technical Instructor - IPexpert, Inc.Telephone: +1.810.326.1444 Fax: +1.810.454.0130 Mailto: tscott@ipexpert.com
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