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    <p>I know three methods (I am most fond of the first):</p> <p><strong>Option 1:</strong><br> A common way to approach something like this is automated telnet (or automated ssh) to send the appropriate commands. IOS is pretty standardized for the most part and works quite well this way- <br>TCL's <a href="http://en.wikipedia.org/wiki/Expect" rel="noreferrer">Expect</a> package is perfect for this kind of thing... I imagine there is a C# implementation.</p> <p>This works best if you are already familiar with IOS syntax.</p> <p><strong>Option 2:</strong><br> This is probably what you want:<br> IF-MIB::<a href="http://tools.cisco.com/Support/SNMP/do/BrowseOID.do?local=en&amp;translate=Translate&amp;objectInput=1.3.6.1.2.1.2.2.1.7" rel="noreferrer">ifAdminStatus</a> is writable via SNMP (Here is an example using NET-SNMP):</p> <p>Interface UP:<br> snmpset -v1 -c community hostname IF-MIB::ifAdminStatus.interface i 1</p> <p>Interface DOWN:<br> snmpset -v1 -c community hostname IF-MIB::ifAdminStatus.interface i 2</p> <p>(Where 'interface' is a digit that represents a interface, the value is available in the same MIB- do a walk on <a href="http://tools.cisco.com/Support/SNMP/do/BrowseOID.do?local=en&amp;translate=Translate&amp;objectInput=1.3.6.1.2.1.2.2.1.2#oidContent" rel="noreferrer">1.3.6.1.2.1.2.2.1.2</a> to find the interface values and descriptions.)</p> <p>(Again there will likely be a C# implementation of snmpset you can leverage... and you must configure the SNMP communities on the device beforehand.)</p> <p><strong>Option 3:</strong><br> It is possible to use SNMP to <a href="http://www.cisco.com/en/US/tech/tk648/tk362/technologies_configuration_example09186a0080094aa6.shtml" rel="noreferrer">trigger</a> an upload or download of config via a TFTP server.<br> This is sometimes used in this sequence:<br> 1. download running config<br> 2. alter that config<br> 3. upload config<br> 4. copy the uploaded config to the running config (overwrites what's active on the device)<br></p>
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    1. POHow can I enable/disable ports in Cisco Catalyst 2960 with C#?
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    1. POHow can I enable/disable ports in Cisco Catalyst 2960 with C#?
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    1. COThanks Niall, your information is very useful. I am going to study on them now. You are right, I think the 2nd option is probably what I am thinking about. But as you suggested the first one, I am going to try it. :P
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    2. COGlad to be of help.
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    3. COI have tried to enable telnet connection and connected to the switch successfully. So writing a C# program to do port switching would be quite simple. Thanks niall for your option1. Besides, my boss still want to use SNMP in this problem so I am going to try option2 now. So 1.3.6.1.2.1.2.2.1.7 is the target OID and it is a single integer type value. But I have totally 24 ports (FastEthernet 1-24), so should there be 24 values and OIDs?
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