Maybe you need to increase the timeout value
or check if the agent has a bug regarding
lexicographic ordering, which is often
the case in conjunction with the tcpConnTable.
Also the PDU size might impose a problem here.
But that would be also an agent bug.
Best regards,
Frank
Enrique J. Garcia Diaz wrote:
Hi Frank,
Thank you for your advice. I have tried without a dot at the beginning
but the result is the same. Anyway, i am going to use the standard from now.
Maybe I make a mistake and the problem is not where I am thinking... I
do not know, do you think that is correct my approach?
Thnks, BR,
Kike
2008/8/13 Frank Fock <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>
Hi Kike,
OIDs do not start with a dot! This is some
stupid notation from NET-SNMP which is
non-standard. Try "1.3.6.1.2.1.6.13.1.1"
instead.
Best regards,
Frank
Enrique J. Garcia Diaz wrote:
Hi Frank,
I am going to try to explain better my question...
I have implemented a method that returns a list with the rows of
any table. The method is called getTable and the code is below.
public List getTable(String[] oid) {
try {
snmp.listen();
}
catch (IOException e) {
e.printStackTrace();
}
TableUtils utils = new TableUtils(snmp, new
DefaultPDUFactory());
OID lowerIndex = null;
OID upperIndex = null;
OID[] arr = new OID[oid.length];
for (int i=0; i<oid.length; i++) arr[i] = new OID(oid[i]);
List list = utils.getTable(target, arr,
lowerIndex, upperIndex);
return list;
}
The input of this method is an array of String that represents
the OIDs. In the case of the table TcpConnTable (from RFC1213)
the array contains the following values:
String [] tcpConnTable = { ".1.3.6.1.2.1.6.13.1.1",
".1.3.6.1.2.1.6.13.1.2", ".1.3.6.1.2.1.6.13.1.3",
".1.3.6.1.2.1.6.13.1.4", ".1.3.6.1.2.1.6.13.1.5" };
".1.3.6.1.2.1.6.13.1.1" belongs to tcpConnState,
".1.3.6.1.2.1.6.13.1.2" belongs to tcpConnLocalAddress, etc.
The returned value of this method in the case of TcpConnTable is
not valid (is null) and nullPointerException is thrown.
I have found some cases that the method returns valid values.
For example if I call the method with the following array of String:
String [] hrSWRunTable = { ".1.3.6.1.2.1.25.4.2.1.1",
".1.3.6.1.2.1.25.4.2.1.2", ".1.3.6.1.2.1.25.4.2.1.3",
".1.3.6.1.2.1.25.4.2.1.4", ".1.3.6.1.2.1.25.4.2.1.5",
".1.3.6.1.2.1.25.4.2.1.6", ".1.3.6.1.2.1.25.4.2.1.7" }
where,
".1.3.6.1.2.1.25.4.2.1.1" belongs to hrSWRunIndex (from
HOST_RESOURCES), ".1.3.6.1.2.1.25.4.2.1.2" belongs to
hrSWRunName, etc.
So, I think that the problem is that I am not able to call this
method with the correct array of String that belongs of the list
of OIDs of the columns in the table. I have found with a MIB
browser that there is a OIDs like I wrote in my previous mail
(.1.3.6.1.2.1.6.13.1.1.127.0.0.
1.27015.127.0.0.1.1093).
Then, I would like to know if I am doing something wrong and how
people retrieve data from a table like TcpConnTable.
I hope I have explained better with this mail.
Thanks and BR,
Kike
2008/8/12 Frank Fock <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
<mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>>
Hello Kike,
What exactly is the problem?
Best regards,
Frank
Enrique J. Garcia Diaz wrote:
Hello everybody!
I have tried to look for an answer first to previous
messages but,
unfortunately I have not found anything that clarify me.
So, I
apologize if
this is not the best place to ask or if someone has asked
before.
My problem is that I want to make a program that retrieve
SNMP
information.
In particular, I have some problems retrieving information in
some tables,
in particular, TcpConnTable (RFC1213).
The problem is that if I use getTable method (in
org.snmp4j.util.TableUtils), I do not receive the data of the
tables. The
reason is because some OIDs are something like this:
.1.3.6.1.2.1.6.13.1.1.127.0.0.1.27015.127.0.0.1.1093,
where the
last fields
are my IP address and the listened port (info that it is
likely
that I do
not know)
So, I am not able to retrieve TcpConnTable using SNMP4J.
Anybody
has any
suggestions? How can I get these variables?
I have tried to use GetNext and GetBulk methods but the
problem
is the same,
I do not know the exact name of the OID that I want to
retrieve.
I hope I
have expressed correctly the problem and everybody
understand it.
Thanks in advanced,
Kike
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