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RE: ISA server limits
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RE: ISA server limits - 13.Aug.2008 5:12:15 PM
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remushociota
Posts: 62
Joined: 12.Apr.2004
Status: offline
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Strictly going by the book price and we all know how much decission making person like the price argument :) the license cost is also something you might consider... I mean if you have to pay for EE license taken from Ms website you're dead :) 6000$ per processor... vs 1500.
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RE: ISA server limits - 15.Aug.2008 8:49:43 AM
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tshinder
Posts: 47439
Joined: 10.Jan.2001
From: Texas
Status: offline
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Hi Jason,
A top end dual core Xeon box with 4GB of fast RAM and fast disks, plus configuration according to the best performance guidelines, can easily take care of 1500 users on a 20Mbps Internet connection when using SE.
I use EE only when NLB is required, or when I can determine that CARP is actually providing the organization some value, or if they have a distributed setup.
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
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RE: ISA server limits - 15.Aug.2008 9:04:53 AM
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Jason Jones
Posts: 2121
Joined: 30.Jul.2002
From: United Kingdom
Status: offline
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quote:
ORIGINAL: tshinder
Hi Jason,
A top end dual core Xeon box with 4GB of fast RAM and fast disks, plus configuration according to the best performance guidelines, can easily take care of 1500 users on a 20Mbps Internet connection when using SE.
I use EE only when NLB is required, or when I can determine that CARP is actually providing the organization some value, or if they have a distributed setup.
Thanks!
Tom
Yeah, I find most of our Enterprise customers now want HA and centralised management so EE is becoming more the de facto standard for us, either using standard server hardware or the Celestix enterprise units...
_____________________________
Jason Jones (MVP)
Silversands Limited http://www.silversands.co.uk
My Blog: http://blog.msfirewall.org.uk/
Get our NEW ISA 2006 Book!: http://tinyurl.com/2gpoo8
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RE: ISA server limits - 15.Aug.2008 9:06:18 AM
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Jason Jones
Posts: 2121
Joined: 30.Jul.2002
From: United Kingdom
Status: offline
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quote:
ORIGINAL: tshinder
Also, there's no reason why you can't use two or three SE ISA firewalls and use DNS round robin to distribute the load among the ISA firewalls.
HTH,
Tom
Now sure how effective this would be with SSL based applications due to the lack of affinity with DNS RR...
_____________________________
Jason Jones (MVP)
Silversands Limited http://www.silversands.co.uk
My Blog: http://blog.msfirewall.org.uk/
Get our NEW ISA 2006 Book!: http://tinyurl.com/2gpoo8
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RE: ISA server limits - 15.Aug.2008 9:09:26 AM
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tshinder
Posts: 47439
Joined: 10.Jan.2001
From: Texas
Status: offline
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Hi Jason,
From how I understand how DNS RR works, the machine receives a list of names and then uses the name on top, unless the cached DNS record expires, and it requests name resolution again for the array. So, clients would be randomly assigned to a firewall for the period of time that the DNS record stays in the client cache. Then it may be assigned to another firewall when the name of the ISA firewall needs to be resolved again. So, there's no switching between firewalls during the course of a single session.
Do you understand DNS RR working differently?
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
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