Doug,
Thank you very much for replying and providing information that I was
desperately need to learn.
Thanks!!!
Thanh.
-----Original Message-----
From: Doug Sebastian [mailto:d.sebastianIZZATf5.com]
Sent: Thursday, January 24, 2002 1:01 PM
To: lb-lIZZATvegan.net
Subject: RE: [load balancing] f5 3-DNS Controller loadbalancing
Thanh,
3-DNS has a built in prober which is all set up to probe servers
which have UC Davis agents. All you have to do to set this up is to
configure the SNMP prober in 3-DNS to use prober type "ucd" and then
set the appropriate community name and SNMP version number.
Then of course you need to make sure your UC Davis
agents on the servers are configured. You do not need to make any
special modifications to the agents on your servers. All you have to do
is set the community name and make sure that the agent is allowing access
from the IP address of the 3-DNS prober.
3-DNS collects the following statistics from a server which has a UC Davis
agent.
It extracts the bytes, packets, and current connections for the server
using the MIBII based interface tables. It extracts current load-average,
available memory, and available disk from the UC Davis enterprise MIB
which is supported by all UC Davis agents.
3-DNS uses these statistics in the following manner. It turns the packet and
byte counts into kbytes/second and packet/second rates. These two rates and
the current connections counts may be used for load-balancing. Limits may be
set on all of these statistics. In this case if a limit is exceeded the
server
will be marked as unavailable and the traffic will be sent to other
available
servers.
I don't believe you really need access to the 3-DNS MIB. The 3dns.my MIB
file
describes the statistics which are available from the 3-DNS enterprise MIB.
These are statistics for the 3-DNS product.
It does not describe the OIDS we probe when we are probing servers or other
load balancers.
I hope this answers your question,
Doug Sebastian
F5 Networks
-----Original Message-----
From: Thanh Nguyen [ mailto:ThanhIZZATmidstream.com <mailto:ThanhIZZATmidstream.com>
]
Sent: Thursday, January 24, 2002 9:11 AM
To: 'lb-lIZZATvegan.net'
Subject: RE: [load balancing] f5 3-DNS Controller loadbalancing
Mark,
I sincerely thank you for replying to my post.
However, I still have a "little problem" :)
The problem is that at this time, I do not have neither a bigIP nor 3-DNS
Controller yet. I am in "researching" mode to see if the 3-DNS controller
product can actually work with our server which has UCD-SNMP agent running
on it. Therefore, I don't have access to the mib
"/usr/local/share/snmp/mibs/3dns.my".
I am kind a want to ask if there is anyway you could share me the 3dns.my
file. That way, I can see exactly what OID within the mib.
Also,since I don't have the 3dns box and so I don't know how it works
yet.... I have a follow up question for you... Does the 3-DNS box polls
(SNMPGET) the agent which runs on my server for the value of those OIDs in
the 3dns.my mib or the agent SNMPSET the value of those attribute to the
3dns server ?
Once again, thank you very much for your response and your help. I greatly
appreciated it.
Thanks.
Thanh Nguyen.
-----Original Message-----
From: Mark Natoli [ mailto:mnatoliIZZATappliedtheory.com
<mailto:mnatoliIZZATappliedtheory.com> ]
Sent: Thursday, January 24, 2002 6:04 AM
To: 'lb-lIZZATvegan.net'
Subject: Re: [load balancing] f5 3-DNS Controller loadbalancing
On Wed, 23 Jan 2002, Thanh Nguyen wrote:
> Does anyone out there know what MIB OIDs does the F5 3-DNS Controller is
> querying the UCD-SNMP agent for loadbalancing ?
> A list of MIB file names and/or mib OID would be very useful.
> Any feedback on this is greatly appreciated.
3DNS MIB = /usr/local/share/snmp/mibs/3dns.my
To get number of times a BIG-IP Virtual Server is used for a DNS
resolution, use this OID:
.1.3.6.1.4.1.3375.1.2.1.1.3.4.1.6
If you are using host not behind a BIG-IP use this OID:
.1.3.6.1.4.1.3375.1.2.1.1.4.4.1.6
I did run into an issue using this OID where an snmpget caused named on
my 3dns to dump core and exit. So I would recommend configuring in a test
environment.
-Mark
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