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Error: Could not identify port number

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I have different Cisco switches (Catalyst, Nexus) configured and working mostly, but for some (random) interfaces SNMP Traffic sensor returns error "Could not identify port number". PRTG version 15.2.16.2229+ . Is there a way to fix this?

error error-messages snmp-traffic

Created on May 6, 2015 4:17:39 PM by  kalev (0) 1



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Hi,
have you set the automatic port name update for these devices?
Best regards

Created on May 8, 2015 1:05:53 PM by  Konstantin Wolff [Paessler Support]



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yes (but I have tried manual ("keep names..") also without success), currently:

Port Name Update:Automatic sensor name update if name changes in device Port Identification:Automatic (recommended) Start and end port = 0

Created on May 8, 2015 3:58:50 PM by  kalev (0) 1



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Hi,
do the said ports have unique identifiers such as ifAlias or ifName? If so, have you tried using one of them explicitly?
Best regards

Created on May 11, 2015 1:35:27 PM by  Konstantin Wolff [Paessler Support]



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hi,

it turns out that, if device configuration contains in Description string "->" (minus and greater_than), then sometimes it breaks something inside PRTG (but in most cases not)

Created on May 11, 2015 2:56:06 PM by  kalev (0) 1



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to be precise, previous response was relevant to Catalyst only, for Nexus it (PRTG) seems to not like symbol "/" (slash) in Description of port configuration.

Created on May 11, 2015 3:42:32 PM by  kalev (0) 1



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Hi,
Thank you for investigating. Please allow me to forward your findings to our testing team to reproduce the issue. I will get back to you as soon as we know more here.
Best regards

Created on May 12, 2015 6:34:36 AM by  Konstantin Wolff [Paessler Support]



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Hi,
Just an update for you. Our testing team has identified the issue which is a bug indeed. A development ticket has been opened and a fix should be available with an upcoming version.
As a workaround, please do not use ifDescriptions with said symbols.
Best regards

Created on May 12, 2015 1:14:07 PM by  Konstantin Wolff [Paessler Support]



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In which Version should that bug fixed? We cannot change or touch on some Routers the description.

Created on Jun 3, 2015 1:19:01 PM by  Oliver (10) 1



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Hi,
the bugfix is included in the next stable version. Release is scheduled for some time next week. Best regards

Created on Jun 3, 2015 2:05:56 PM by  Konstantin Wolff [Paessler Support]



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