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Spike in traffic periodically - 24.Jan.2008 9:24:38 AM

wlazzell

Posts: 17
Joined: 22.Jan.2008
Status: offline

Hello All,
Occasionally, I see a spike in traffic shown in the usage reports of about 45 GB. I am running ISA2006. This does not happen every day, and it does not follow a set pattern. Would this be the download of the internet cache occuring?

Thanks

< Message edited by wlazzell -- 24.Jan.2008 9:25:50 AM >

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RE: Spike in traffic periodically - 24.Jan.2008 12:21:12 PM

tshinder

Posts: 47439
Joined: 10.Jan.2001
From: Texas
Status: offline

What do you mean by "download of the Internet cache"?

Thanks!
Tom

_____________________________

Thomas W Shinder, M.D.
Sr. Consultant/Technical Writer
Prowess Consulting http://www.prowessconsulting.com/
Blog: http://blogs.isaserver.org/shinder/

GET THE NEW ISA 2006 Book!: http://tinyurl.com/2gpoo8

(in reply to wlazzell)

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RE: Spike in traffic periodically - 24.Jan.2008 12:26:22 PM

wlazzell

Posts: 17
Joined: 22.Jan.2008
Status: offline

Poor phrasing of words on my part, what I meant was could this be ISA "refreshing" its cache contents? From what I understand, ISA keeps a local cache to speed up internet requests - is this not the case?

(in reply to tshinder)

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RE: Spike in traffic periodically - 26.Jan.2008 1:44:41 PM

tshinder

Posts: 47439
Joined: 10.Jan.2001
From: Texas
Status: offline

Not true. ISA Firewalls haven't supported dynamic cache updates since ISA 2000.

HTH,
Tom

_____________________________

Thomas W Shinder, M.D.
Sr. Consultant/Technical Writer
Prowess Consulting http://www.prowessconsulting.com/
Blog: http://blogs.isaserver.org/shinder/

GET THE NEW ISA 2006 Book!: http://tinyurl.com/2gpoo8

(in reply to wlazzell)

Post #: 4

RE: Spike in traffic periodically - 28.Jan.2008 7:26:43 AM

wlazzell

Posts: 17
Joined: 22.Jan.2008
Status: offline

Which still does not answer my original question, what is the spike in traffic as shown below:

Traffic
The following chart summarizes the amount of network traffic, by date, sent through ISA Server. This report includes both Web and non-Web traffic.

Traffic by date

And on my ISA server, there is a file called Dir1.cdat that is 39,680,000 kb in size, is that not the cache file?

All I am trying to determine is what causes this spike in traffic periodically?

Thanks

(in reply to tshinder)

Post #: 5

RE: Spike in traffic periodically - 28.Jan.2008 10:44:32 AM

tshinder

Posts: 47439
Joined: 10.Jan.2001
From: Texas
Status: offline

Check your reports and log files to see what might be causing the traffic.

HTH,
Tom

_____________________________

Thomas W Shinder, M.D.
Sr. Consultant/Technical Writer
Prowess Consulting http://www.prowessconsulting.com/
Blog: http://blogs.isaserver.org/shinder/

GET THE NEW ISA 2006 Book!: http://tinyurl.com/2gpoo8

(in reply to wlazzell)

Post #: 6

RE: Spike in traffic periodically - 31.Jan.2008 11:22:49 AM

gofishin

Posts: 21
Joined: 23.Apr.2007
Status: offline

Check your "Content download Jobs" tab on the Cache node - i'm sure you will find a clue in there.. I tend not to download any websites as it uses a hell of a lot of bandwidth. lol.. cheers

(in reply to tshinder)

Post #: 7

RE: Spike in traffic periodically - 31.Jan.2008 11:39:14 AM

tshinder

Posts: 47439
Joined: 10.Jan.2001
From: Texas
Status: offline

Hi Gofishing,

Good idea. I've also found that it fills the cache with junk that no one ever looks at.

Tom

_____________________________

Thomas W Shinder, M.D.
Sr. Consultant/Technical Writer
Prowess Consulting http://www.prowessconsulting.com/
Blog: http://blogs.isaserver.org/shinder/

GET THE NEW ISA 2006 Book!: http://tinyurl.com/2gpoo8

(in reply to gofishin)

Post #: 8