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NLB and CARP (Tom, please advise me) - 1.Oct.2005 4:51:00 AM

wbplomp

Posts: 138
Joined: 18.Nov.2004
From: Netherlands, The
Status: offline

Tom,

I'm having trouble getting CARP to work with NLB. I have an array with two members. Each member has 3 network interfaces. One for the Internal, External and Intra-Array network. NLB works perfect for SecureNAT and WebProxy Clients.

But I get trouble when I enable CARP, let all clients and downstream Proxy Servers use the Automated Configuration Script (http://proxy.parentdomain.nl:8080/array.dll?Get.Routing.Script)

When one of the array members gets offline the clients keep trying to connect to that specific member and are unable to connect. I do no have fault taulerance anymore.

Can you use CARP and NLB together???
If yes, on wich array-level network do I enable CARP? (Internal, Local Host and/or Intra-Array Network?)

I will host more than 10.000 clients, so I have to make the best out of it. I hope you can advise me.

Kind regards,

Boudewijn Plomp

Post #: 1

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RE: NLB and CARP (Tom, please advise me) - 3.Oct.2005 2:40:00 PM

sfc_corp

Posts: 6
Joined: 20.Sep.2005
Status: offline

I'm no expert, but according to the books I have read, you can use both.

You need to enable CARP on the NLB link - it�s counter-intuitive. Its like NLB traffic - it should be passed over the private link.

I have NLB turned off right now, so I can not help with you other questions. CARP and WPAD seem to be working pretty well right now, but I have limited this array to IS personnel only for my test bed.

My eventual load will be less than your (~3000).

Tom

(in reply to wbplomp)

Post #: 2

RE: NLB and CARP (Tom, please advise me) - 4.Oct.2005 4:28:00 PM

wbplomp

Posts: 138
Joined: 18.Nov.2004
From: Netherlands, The
Status: offline

Hi TJ,

Thanks for your responce. I don't have the time-out problem anymore. But I still need to know on wat interfaces to enable CARP. When you want to use the Scheduled download you also have to enable it on the Local Host. For server-side CARP you seem to enable it on the Intra-Array network, but some other information show you should not. Without NLB on the Intra-Array network and only 2 members I don't know if that is neccesary.

Greetings,

Boudewijn

(in reply to wbplomp)

Post #: 3