Segment Retransmitted

Hello There.

When doing a netstat-s

How many segment retransmitted is too many - is it 4 percent of segments sent?

What is the best way to trace these retransmissions - using a smiffer ? How easy is this to do?

Thanks
halcyoneAsked:
Who is Participating?
 
crissandConnect With a Mentor Commented:
The qualitty metters are different hardware tools to verify the quality of a network cabling. I don't know the commercial name of such a tool, but I've seen some functionning: the reports about the cabling quality was very detailed. You can see a sample here: http://www.computerweekly.com/Article111088.htm.

Software monitoring tools.
0
 
crissandCommented:
If it's a LAN is bad, it must be around 0. If it's in Internet it's good, can be between 5 and 30 percent. The retransmission of a segment is done when your computer (the sender) does'n't receive the acq signal in time. You can use netdiag for a more comprehensive diagnostic of your network.
0
 
halcyoneAuthor Commented:

PC's communicating between WANS have the following stats after being rebooted  on Friday  and not connecting to the internet - what the easiest way to find out the cause?
 
Tuesday Morning:
192.168.74.5                13214014 sent      70780 retrans             0.5%
192.168.74.6                13393823 sent    327973 retrans             2.4%
192.168.74.8                  9872540 sent      43062 retrans             0.4%
192.168.74.14              12113122 sent      81588 retrans             0.7%
192.168.74.28               3144063 sent       42137 retrans             2.4%
 
Thursday Morning:
192.168.74.5                 23047639 sent       178366 retrans             0.8%
192.168.74.6                 20335236 sent       759408 retrans             3.7%
192.168.74.8                  16368667sent         97540 retrans             0.6%
192.168.74.14                19401001sent        181531retrans             0.9%
192.168.74.28                 9432007 sent       113058 retrans             1.1%
 

192.168.74.6                 28879828 sent       828394 retrans             2.8%
 
thanks
0
Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

 
halcyoneAuthor Commented:
Is it possible that some router settings like using cisco WFQ methods instead of FIFO could cause this ?

Thanks
0
 
crissandCommented:
As you can see there are two computers that requires retransmission, the one with over 1% retries. There are a lot of tests that can be done, but the best one is using a quality metter. You can try diagnosing by changing port in switch, replacing cables. If the two computers are not the same as others (less powerful processor, less memory, another O/S) or if they are loaded with software which use a lot of processor time, this can be an answer.

0
 
crissandCommented:
Cisco WFQ e slower than FIFO, because is a protection against burst flow. Can be.
0
 
halcyoneAuthor Commented:
Thanks guys,

 -what is a quality meter? And how is it used to test for retransmissions ?

- what ways are there of tracking the cause of retransmission exactly.

thanks
0
 
halcyoneAuthor Commented:
thanks for your input
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.