Re: SNMP Traffic with NetView

["James Shanks" <jshanks@us.ibm.com>]

This is a multipart message in MIME format.

Maxine -

I don't do netmon and I don't know its intimate details so I cannot answer 
your question the way you would like.
But you can adjust the new node polling interval and the configuration 
check poll of a node using xnmsnmpconf. 
That is your only interface into how netmon handles SNMP anyway.
Why not just pick a target and see if adjusting the intervals gets you 
what you want? 
I would also read the help  and the documentation provided on these 
issues.

Offhand, in my opinion for what it is worth,  I would say that netmon must 
read  the iprouteIfindex and Ipnettomediaaddress in order to determine if 
anything on this router has changed, so it has to 
be part of some kind of configuration check.  But if you have unnumbered 
serial interfaces on that router, then there is no other way to determine 
their status, except by SNMP, is there?  And that is what netmon does when 
you have such interfaces, is check the entire
router by SNMP, or so I am told.  Finally, I would remind you that NetView 
is designed to be an SNMP manager.  There is no point in having it if you 
don't want your devices to respond to SNMP.  Routers must or they cannot 
be effectively managed.

James Shanks
Level 3 Support  for Tivoli NetView for UNIX and NT
Tivoli Software / IBM Software Group
 





Maxime TRANNOY/France/Contr/IBM@IBMFR
Sent by: owner-nv-l@tkg.com
12/17/2001 06:57 AM
Please respond to IBM NetView Discussion

 
        To:     IBM NetView Discussion <nv-l@tkg.com>
        cc: 
        Subject:        [NV-L] SNMP Traffic with Netview

 

Hello,

I use a Netview to monitor network devices. i want to reduce the SNMP
traffic between the Netview and my SNMP devices.
Is it possible to have an ICMP monitoring with a polling intervall of 5
minutes and an SNMP polling intervall of 15 or more minutes?

By looking closer to the SNMP traffic Between the SNMP devices and the
Netview i have seen that 80% of the traffic are only used to read two kind
of variables iprouteIfindex mib part and Ipnettomediaaddress mib part.

Why is it usefull to have this kind of information?
Is it not possible to reduce the SNMP traffic by checking a part of the
MIB Only?
Why does Netview check this two mibs. Is to check for the interface state
or
is it for matter of auto discovery.


Thanks in advance for your answer

Kind regards/Cordialement.

Maxime TRANNOY
IGS - Network Delivery Support Center
Tel : +33 (0) 492 114 767
mailto:mtrannoy@fr.ibm.com


_________________________________________________________________________
NV-L List information and Archives: http://www.tkg.com/nv-l



Maxine -

I don't do netmon and I don't know its intimate details so I cannot answer your question the way you would like.
But you can adjust the new node polling interval and the configuration check poll of a node using xnmsnmpconf.  
That is your only interface into how netmon handles SNMP anyway.
Why not just pick a target and see if adjusting the intervals gets you what you want?   
I would also read the help  and the documentation provided on these issues.

Offhand, in my opinion for what it is worth,  I would say that netmon must read  the iprouteIfindex and Ipnettomediaaddress in order to determine if anything on this router has changed, so it has to be part of some kind of configuration check.  But if you have unnumbered serial interfaces on that router, then there is no other way to determine their status, except by SNMP, is there?  And that is what netmon does when you have such interfaces, is check the entire
router by SNMP, or so I am told.  Finally, I would remind you that NetView is designed to be an SNMP manager.  There is no point in having it if you don't want your devices to respond to SNMP.  Routers must or they cannot be effectively managed.

James Shanks
Level 3 Support  for Tivoli NetView for UNIX and NT
Tivoli Software / IBM Software Group

Maxime TRANNOY/France/Contr/IBM@IBMFR Sent by: owner-nv-l@tkg.com 12/17/2001 06:57 AM Please respond to IBM NetView Discussion

To:        IBM NetView Discussion <nv-l@tkg.com>         cc:                 Subject:        [NV-L] SNMP Traffic with Netview

Hello,

I use a Netview to monitor network devices. i want to reduce the SNMP
traffic between the Netview and my SNMP devices.
Is it possible to have an ICMP monitoring with a polling intervall of 5
minutes and an SNMP polling intervall of 15 or more minutes?

By looking closer to the SNMP traffic Between the SNMP devices and the
Netview i have seen that 80% of the traffic are only used to read two kind
of variables iprouteIfindex mib part and Ipnettomediaaddress mib part.

Why is it usefull to have this kind of information?
Is it not possible to reduce the SNMP traffic by checking a part of the
MIB Only?
Why does Netview check this two mibs. Is to check for the interface state
or
is it for matter of auto discovery.


Thanks in advance for your answer

Kind regards/Cordialement.

Maxime TRANNOY
IGS - Network Delivery Support Center
Tel : +33 (0) 492 114 767
mailto:mtrannoy@fr.ibm.com


_________________________________________________________________________
NV-L List information and Archives: http://www.tkg.com/nv-l