The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.
One of a set of tools we're offering as a way of saying thank you for being a part of the community.
COURSE of the MONTH
8 days, 12 hours left to enrollBecome a Premium Member and unlock a new, free course in leading technologies each month.
Solved
How to determine which device is sending bad packets to server?
Posted on 2014-12-09
We have an older version of Microsoft Dynamics Navision on our network. Over the past few weeks it's been reporting an error - error 18 in module 244, multiple times/day, in the Windows 2003 server event log. Research on this error points to a network issue, possibly CRC, or some other related situation where bad packets are sent to the Navision server.
However, I haven't found a good way to determine which device (we have 100+ users) is sending the bad packets. I've replaced the NIC and cable on the server, and that didn't help. I've installed Wireshark, and I've tried looking for anything odd around the time the log entries are recorded, but I'm new to it and I don't know what to look for specifically, as nothing stood out.
Thanks.
However, I haven't found a good way to determine which device (we have 100+ users) is sending the bad packets. I've replaced the NIC and cable on the server, and that didn't help. I've installed Wireshark, and I've tried looking for anything odd around the time the log entries are recorded, but I'm new to it and I don't know what to look for specifically, as nothing stood out.
Thanks.
[X]
Welcome to Experts Exchange
Add your voice to the tech community where 5M+ people just like you are talking about what matters.
- Help others & share knowledge
- Earn cash & points
- Learn & ask questions
3 Comments
Active today
You have more problems here. Mainly because you don't know what you're looking for. I actually, highly doubt you would find it even IF you knew the problem with more details.
That's because right now, you think it's about "sending bad packets". This alone will help absolutely no one. Are those TCP packets ? On which port do they arrive. Even then the next question would be, how do you detect a bad packet from a good packet. I highly doubt you would find it in Wireshark with any filter you write.
A better solution would be to update your software. Proper software should not error when bad packets are sent. And proper software shouldn't send packets (so update both server and clients).
If you can't, there's nothing more you can do then methodically disconnect groups of PC's and see how it behaves, and continue untill you have positive results (and then divide that group again until you have the "culprit").
That's because right now, you think it's about "sending bad packets". This alone will help absolutely no one. Are those TCP packets ? On which port do they arrive. Even then the next question would be, how do you detect a bad packet from a good packet. I highly doubt you would find it in Wireshark with any filter you write.
A better solution would be to update your software. Proper software should not error when bad packets are sent. And proper software shouldn't send packets (so update both server and clients).
If you can't, there's nothing more you can do then methodically disconnect groups of PC's and see how it behaves, and continue untill you have positive results (and then divide that group again until you have the "culprit").
Active 5 days ago
We're actually moving to a new server with a new version of Navision software in a few months (data cleanup alone will take awhile). However, this means nothing to the 80 or so staff that rely on this program daily until then.
But yeah, I have no real idea what can best help track down this issue, and there doesn't seem to be a really viable way, since the rest of the network is running fine.
But yeah, I have no real idea what can best help track down this issue, and there doesn't seem to be a really viable way, since the rest of the network is running fine.
Featured Post
Question has a verified solution.
If you are experiencing a similar issue, please ask a related question
Many of us in IT utilize a combination of roaming profiles and folder redirection to ensure user information carries over from one workstation to another; in my environment, it was to enable virtualization without needing a separate desktop for each…
Trying to figure out group policy inheritance and which settings apply where can be a chore. Here's a very simple summary I've written which might help. Keep in mind, this is just a high-level conceptual overview where I try to avoid getting bogge…
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail. The methods are covered in more detail in o…
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg).
If you're looking for how to monitor bandwidth using netflow or packet s…
Suggested Courses
Course of the Month8 days, 12 hours left to enroll
764 members asked questions and received personalized solutions in the past 7 days.
Join the community of 500,000 technology professionals and ask your questions.