It's probably not related but I recently saw something similar. In this case ICMP and RTP packets were dropping but everything else was fine. As it turned out the firewall was dropping packets because of poorly adjusted Ping/UDP flood detection parameters.
Paul On Apr 20, 2010, at 12:12 PM, <[email protected]> wrote: > That's not quite the case. Since most of the traffic gets through. I can SNMP > walk and all. It's only 10%-13% that does not get through apparently. Not > sure why yet. I'll setup the tcpdump shortly. > > Andrey > > On Apr 18, 2010, at 10:29 AM, Manickaraja Arumugam wrote: > >> Hi >> >> You should allow icmp traffic in the firewall for its behind devices to the >> intermapper server. >> >> Regards >> Manickaraja >> >> >> ------Original Message------ >> From: [email protected] >> To: InterMapper-Talk >> ReplyTo: InterMapper-Talk >> Subject: RE: [IM-Talk] Packet loss question >> Sent: Apr 17, 2010 12:58 AM >> >> Well, the device seems to be responding to SNMP just fine. I can walk it >> (from InterMapper), I can poll it and it works like expected. However, the >> status window says that packet loss is 13% for all devices beyond the >> firewall. I'm suspecting the firewall does something stupid, but I'm trying >> to understand how InterMapper determines that there is packets loss, so I >> know what to look for in the firewall. >> >> So, in short, not exactly. I guess the actual question is "which packets >> need to get lost for the counter to increase?" >> >> >> -------------- >> Andrey Khomyakov | Senior Network Engineer | +1.617.879.5945 >> >> Confidentiality Note: This e-mail, and any attachment to it, is intended to >> be confidential and might be legally privileged. It is intended solely for >> the use of the addressee. If you are not the intended recipient, you are >> hereby notified that reading, copying, disseminating or distributing this >> email is strictly prohibited. If you have received this e-mail in error, >> please immediately return it to the sender and delete it from your system. >> Thank you. >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Janice Losgar >> Sent: Friday, April 16, 2010 3:21 PM >> To: InterMapper Discussion >> Subject: Re: [IM-Talk] Packet loss question >> >> Andrey, >> >> If you are using the default device thresholds, then for SNMP probes, >> InterMapper is sending two SNMP requests and, if the device fails to respond >> to the SNMP >> >> ------Original Message Truncated------ >> >> "DISCLAIMER: This message is proprietary to Aricent and is intended solely >> for the use of the individual to whom it is addressed. It may contain >> privileged or confidential information and should not be circulated or used >> for any purpose other than for what it is intended. If you have received >> this message in error, please notify the originator immediately. If you are >> not the intended recipient, you are notified that you are strictly >> prohibited from using, copying, altering, or disclosing the contents of this >> message. Aricent accepts no responsibility for loss or damage arising from >> the use of the information transmitted by this email including damage from >> virus." >> .+-j�!�����i��0�f���܆+�r���{^�f����jY8�X��֫��y�&�:.�˛���m� �צj)m���z����M�d����]j�pj��� > ____________________________________________________________________ > List archives: > http://www.mail-archive.com/intermapper-talk%40list.dartware.com/ > To unsubscribe: send email to: [email protected] > Paul Carlson VP Network Administration Guam Cablevision, LLC. Phone: +1 671 969-4102
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