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05.07.2008 at 03:32PM PDT, ID: 23384526
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HOW DO I LOAD BALANCE INTERNET BANDWITH WITH ISA 2006 AND TWO ISP PROVIDERS
Tags: Microsoft, ISA, 2006, load balance bandwith
I have two internet services working (T1 1.5M, DSL 3M), with two different ISA Servers configured for each one, both on the same network.

I use one (DSL) for users that need to surf the internet. The DHCP is configured with this ISA as the default gateway.

I use the other one (T1) for publishing my website, exchange server, VPN Access.

For contingency purposes I would like to know if I can manage both on the same ISA, and try to "load balance" or "fail over" services.

Thank you.



Thank you.
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Question Stats
Zone: Networking
Question Asked By: gabepcsolutions
Solution Provided By: MrManderson
Participating Experts: 1
Solution Grade: A
Views: 0
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05.12.2008 at 04:22AM PDT, ID: 21545904

Rank: Master

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05.12.2008 at 08:38AM PDT, ID: 21547927

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05.12.2008 at 09:09AM PDT, ID: 21548163

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05.12.2008 at 09:47AM PDT, ID: 21548517

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05.12.2008 at 09:50AM PDT, ID: 21548546

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05.12.2008 at 10:36AM PDT, ID: 21548928

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05.12.2008 at 11:57AM PDT, ID: 21549578

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05.13.2008 at 01:17AM PDT, ID: 21553082

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05.12.2008 at 04:22AM PDT, ID: 21545904

Rank: Master

Hi there,

This isn't something offered by ISA, but can be found on hardware soloutions. I have a very similar layout in my office but only require 1 ISA server. I use a cisco 1812 with dual wan NLB to get the most of my 2 connections for outgoing traffic. As far as incoming they would both remain seperate as they would have different IP's. The only way to get 2 physical lines to act as one would be channel bonding but this is a feature that needs to be supported by the ISP in which the lines are connected together at the PSTN exchange.

So your best bet would look something like this.

---Internet ------- DSL Modem ------
                                                      I
                                                    Dual Wan router (NLB Enabled) ------------ ISA ---------- Network
                                                      I
---Internet ------- T1    Modem ------

Regards
Steve
 
05.12.2008 at 08:38AM PDT, ID: 21547927
...this looks really great. So who handles the access policies?...the router or the ISA?
 
05.12.2008 at 09:09AM PDT, ID: 21548163

Rank: Master

The load balancing is looked after by the router while the access policies etc remain the on ISA.

Regards
Steve
 
05.12.2008 at 09:47AM PDT, ID: 21548517
..ok, got it.

Will my CISCO ASA 5505 do the job right?... routing and load balancing?
 
05.12.2008 at 09:50AM PDT, ID: 21548546

Rank: Master

The router has to have dual WAN Ports and support NLB, Im pretty sure this isnt something the ASA 5505 offers
 
05.12.2008 at 10:36AM PDT, ID: 21548928
Ok.

Thank you.
 
05.12.2008 at 11:57AM PDT, ID: 21549578

Rank: Master

Your Most Welcome
 
05.13.2008 at 01:17AM PDT, ID: 21553082

Rank: Master

This question has been answered and should not be deleted
Accepted Solution
 
 
20080236-EE-VQP-29 / EE_QW_2_20070628