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| | | Junior Member
 
Group: Forum Members
Last Login: 11/20/2008 4:52:05 AM
Posts: 19, Visits: 9 |
| | Hello I've run a network scan on my network and it seems that all devices are found. The problem is, only around half of my switches are being recognized as switches. All of them are from Cisco. Some of the same model are detected while others remain as unknown. The unknown ones also haven't any SNMP details shown under System. Models which seem to be detected correctly are:
catalyst2960G24
catalyst2960G48
catalyst3560G24PS
cat6509
catalyst37xxStack But a lot of other stacks aren't detected and also the 2970G series isn't detected. But a lot of switches of the same type (maybe different software release) are not being detected. Any idea why that is? Thanks,
Pato |
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| | | Forum Member
Group: Forum Members
Last Login: 12/31/2008 2:52:39 PM
Posts: 30, Visits: 95 |
| | When a device is returned with no SNMP data; it usually is related to the devices either not being enabled for SNMP or the discovery process using an incorrect SNMP community name. Have you checked these devices to ensure that SNMP has been enabled? Brian WhatsConnected Product Team. |
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| | | Junior Member
Group: Forum Members
Last Login: 11/20/2008 4:52:05 AM
Posts: 19, Visits: 9 |
| | Yes I did. They all have the same snmp community string configured. It works if I poll them with other tools. They are also all on the same subnet. |
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| | | Forum Member
Group: Forum Members
Last Login: 12/31/2008 2:52:39 PM
Posts: 30, Visits: 95 |
| | A couple thoughts/things to look at. Sometimes devices can restrict what hosts can talk SNMP to them. Please ensure that the devices that you are trying to query are not blocking access from the WhatsConnected console. Also, If you open the WC console, look under "Configure->Protocol Settings". Make sure that the correct SNMP community names are shown in the configuration. Finally, can you give me some details on how you are setting up the discovery scope? If you are using PING sweep, ensure that the INCLUDE scope is including the subnet of the "undiscovered" devices; or if you are using an ARP cache discovery, check to make sure that the INCLUDE scope is either empty or that it includes the subnet that you are working with. If you can include some of this info; we can help get through this issue. Brian WhatsConnected Product Team |
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| | | Junior Member
Group: Forum Members
Last Login: 11/20/2008 4:52:05 AM
Posts: 19, Visits: 9 |
| | I can manualy snmpwalk them from the same machine and get all the details. The snmp community name under "Configure->Protocol Settings" is the correct one. I'm doing an ARP cache discovery. The Include scope includes the subnet (otherwise it wouldn't recognize half of the switches). I might need to add, it finds all devices, but it doesn't realize for around the half of them that they are switches. It only puts them to unknown. |
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| | | Forum Member
Group: Forum Members
Last Login: 12/31/2008 2:52:39 PM
Posts: 30, Visits: 95 |
| | Can you manually add a device? (Discover->Device...) Does it show any errors? Also, what is your SNMP retry and timeout? -Brian |
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| | | Junior Member
Group: Forum Members
Last Login: 11/20/2008 4:52:05 AM
Posts: 19, Visits: 9 |
| | Hi It works if I manually add the switch. It also looks way better if I lower the thread count to 4 instead of the default 40. Timeout is 1000ms and retry count is 1 (default settings). I'm running it on a Windows XP host inside a VMWare Guest with Windows XP. |
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| | | Junior Member
Group: Forum Members
Last Login: 11/20/2008 4:52:05 AM
Posts: 19, Visits: 9 |
| Good news 
It worked now. I changed the retry count to 3 and did a complete rescan. Now it detected all devices. It seems that the default setting of 1 retry could be to low (when it's run in a VMWare Guest). -
pato |
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