If nothing else is displayed, it means that no SNMP packets arrives to the
switch : Check the complete path from your station to the switch, including
Firewalls, etc, etc.
A working access would be displayed like follow on the station/switch
STATION :
[jur466@nocu07 ~]$ /usr/bin/snmpwalk -c MailleComunity mgth03
.1.3.6.1.2.1.1.1.0 = STRING: Cisco IOS Software, C3560 Software
(C3560-IPBASE-M), Version 12.2(25)SEE2, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2006 by Cisco Systems, Inc.
Compiled Fri 28-Jul-06 07:19 by yenanh
.1.3.6.1.2.1.1.2.0 = OID: .1.3.6.1.4.1.9.1.563
.1.3.6.1.2.1.1.3.0 = Timeticks: (2997499098) 346 days, 22:23:10.98
.1.3.6.1.2.1.1.4.0 = STRING: NOC 061 686 17 50
.1.3.6.1.2.1.1.5.0 = STRING: mgth03.manor.ch
Etc etc
SWITCH :
Jul 29 13:55:55.375: SNMP: Packet received via UDP from 169.232.1.2 on Vlan233
Jul 29 13:55:55.375: SNMP: Get-next request, reqid 1375963442, errstat 0,
erridx 0
mib-2 = NULL TYPE/VALUE
Jul 29 13:55:55.375: SNMP: Response, reqid 1375963442, errstat 0, erridx 0
system.1.0 = Cisco IOS Software, C3560 Software (C3560-IPBASE-M), Version
12.2(25)SEE2, RELEASE SOFTWARE (fc1)
Jul 29 13:55:55.384: SNMP: Packet sent via UDP to 169.232.1.2
Jul 29 13:55:55.384: SNMP: Packet received via UDP from 169.232.1.2 on Vlan233
Jul 29 13:55:55.384: SNMP: Get-next request, reqid 1375963443, errstat 0,
erridx 0
system.1.0 = NULL TYPE/VALUE
Jul 29 13:55:55.384: SNMP: Response, reqid 1375963443, errstat 0, erridx 0
system.2.0 = products.563
Jul 29 13:55:55.392: SNMP: Packet sent via UDP to 169.232.1.2
Jul 29 13:55:55.392: SNMP: Packet received via UDP from 169.232.1.2 on Vlan233
Jul 29 13:55:55.392: SNMP: Get-next request, reqid 1375963444, errstat 0,
erridx 0
system.2.0 = NULL TYPE/VALUE
Jul 29 13:55:55.392: SNMP: Response, reqid 1375963444, errstat 0, erridx 0
sysUpTime.0 = 2997482308
Jul 29 13:55:55.392: SNMP: Packet sent via UDP to 169.232.1.2
Jul 29 13:55:55.392: SNMP: Packet received via UDP from 169.232.1.2 on Vlan233
Jul 29 13:55:55.392: SNMP: Get-next request, reqid 1375963445, errstat 0,
erridx 0
sysUpTime.0 = NULL TYPE/VALUE
etc etc
De : Abid Ayoub [mailto:abid.ay...@gmail.com]
Envoyé : Montag, 29. Juli 2013 13:41
À : Jurkiewicz Jean-Marc
Cc : Lee; net-snmp-users@lists.sourceforge.net
Objet : Re: Timeout
Hi,
after i enter :
term mon
debug snmp packets
i get : SNMP packet debugging is on
Abid
2013/7/29 Jurkiewicz Jean-Marc
<jean-marc.jurkiew...@manor.ch<mailto:jean-marc.jurkiew...@manor.ch>>
With « term mon » ( Terminal monitor) + "debug snmp" entered on the switch,
you should get some messages on the switch.
Do you see some ?
Best regards
JM
De : Abid Ayoub [mailto:abid.ay...@gmail.com<mailto:abid.ay...@gmail.com>]
Envoyé : Montag, 29. Juli 2013 10:01
À : Lee
Cc :
net-snmp-users@lists.sourceforge.net<mailto:net-snmp-users@lists.sourceforge.net>
Objet : Re: Timeout
Hi,
I get nothing, i get the same message : Timeout: No Response from <IP>
so , are there other solutions to solve this problem ?
Abid
2013/7/26 Lee <ler...@gmail.com<mailto:ler...@gmail.com>>
On 7/26/13, Abid Ayoub <abid.ay...@gmail.com<mailto:abid.ay...@gmail.com>>
wrote:
>
> I think that the problem is in udp port or in ip adresse because there is
> only one community string configured and have already tried the command
> with "v2c" and "v3".
>
> So any idea how can i change the port used by net-snmp and be certain that
> cisco is configured to accept requests from your IP address?
The port number isn't the problem. To see what's happening on the
switch, get into enable mode on the switch & do
conf t
snmp-server community zuperZekret ro
end
term mon
debug snmp packets
Then from your PC do
snmpget -v 2c -c zuperZekret <ip address of switch> .1.3.6.1.2.1.1.5.0
that should give you enough information to figure out what the problem is
Regards,
Lee
>
> Thanks
> Abid
>
>
>
> 2013/7/25 Fulko Hew <fulko....@gmail.com<mailto:fulko....@gmail.com>>
>
>>
>>
>> On Thu, Jul 25, 2013 at 10:13 AM, Abid Ayoub
>> <abid.ay...@gmail.com<mailto:abid.ay...@gmail.com>>
>> wrote:
>>
>>> Hello,
>>>
>>> This is the first time that i use net-snmp.
>>> So, i want to know the general configuration and other informations
>>> about
>>> my cisco switch using snmpwalk and snmpget.
>>> So , i use the following command:
>>>
>>> snmpget -c <community> -v2c <IP> 1.3.6.1.6.1
>>>
>>> but i get immer :
>>>
>>> Timeout: No Response from <IP>
>>>
>>> i connect to the switch using ssh , but the command don´t work .
>>>
>>> So , any idea about the problem ? what is wrong ?
>>>
>>
>> Only the obvious:
>>
>> - a firewall is blocking UDP port 161 between yr box and the Cisco switch
>> - you are using the wrong community string
>> - your Cisco isn't configured to support SNMP v2c
>> - your Cisco isnt' configured to accept requests from your IP address.
>>
>> FYI:
>> Since the OID you stated isn't an ultimate variable, but just a branch in
>> the tree...
>> you will (eventually) get a 'noSuch' response. Once you get your other
>> issue resolved,
>> either specify a real variable, or use snmpwalk instead.
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