This is our old Q&A Site. Please post any new questions and answers at ask.wireshark.org.

Hi Folks,

I am having intermittent issues with Citrix XenApp Latency over WAN. I have been running wireshark on client machines during the week recording periods both good and poor performnace periods.

Firstly I have not found any errors, retransmissions, Dup acks in the captures nor have I found any 0 window size packets.

When I used the IO graph to plot the citrix TCP stream I noticed there were drop offs in packet throughput periodically during goodish periods and more frequently during bad periods. There were no errors to corealate these drops in throughput to.

I then overlayed the 'TCP.time_delta >.6' into the IO graph and noticed these values spiked before and after the citrix traffic packet throughput drops.

The only thing that appear to corealate to the packet throughout drops and the TCP time delta >.6 was that the client machies were receiving keepalive messages from 2x MS Exchange servers right before and sometimes during the Citrix packet throughput drops.

Infact in the captures taken during particularly bad periods the number of MS Exchange keepalives being received by the client is much higer than during the good periods.

I'm not sure what to make of this as normally I filter out keepalive messages I have never seen anything like this before. has anyone else?

asked 05 Jul '14, 04:35

Ciag's gravatar image

Ciag
11336
accept rate: 0%

Be the first one to answer this question!
toggle preview

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here

By RSS:

Answers

Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text](http://url.com/ "title")
  • image?![alt text](/path/img.jpg "title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported

Question tags:

×28
×13
×8

question asked: 05 Jul '14, 04:35

question was seen: 1,230 times

last updated: 05 Jul '14, 04:35

p​o​w​e​r​e​d by O​S​Q​A