RE: Cluster technologie ?

  • From: "Periyasamy, Raj" <psraj@xxxxxxxxxxxx>
  • To: "'[ISAserver.org Discussion List]'" <isalist@xxxxxxxxxxxxx>
  • Date: Fri, 1 Feb 2002 11:38:38 -0500

All you need to do is create a DNS entry for the virtual host name and
virtual IP of your NLB cluster. And all your browsers point to the virtual
host name as the proxy. This way even if one ISA is down, client will
automatically connect to other ISA server.

Regards,

Raj




-----Original Message-----
From: Armando Treviño López [mailto:armando.trevino@xxxxxxxxxxx]
Sent: February 01, 2002 11:32 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Cluster technologie ?


http://www.ISAserver.org


But wait a second, what have you done to enable Load Balancing and fault
tolerance at the same time with two ISA's in Standalone mode?

Only create two records in the DNS with the same name and the IP of the two
servers??

I've try that and work for load balancing, but when i turned off one server
the requests were still balancing between the two servers. You can check
this by making pings to the server name... it stills keep ansering the one
that is offline.

I had to remove manually the entry for the offline server.

Is there any other way to enable fault tolerance in standalone servers? Or
can I create an array of two ISA's that are in standalone? I don't have
active directory yet.

Thanks.


-----Original Message-----
From: Periyasamy, Raj [mailto:psraj@xxxxxxxxxxxx]
Sent: Friday, February 01, 2002 8:43 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Cluster technologie ?


http://www.ISAserver.org


It does provide a "not so nice" fault tolerance. Each time a Clint requests
a DNS resolution, the Clint will get either the surviving server or failed
server name resolved. When the client gets the surviving server its fine.
When the client gets the failed server, its a bit annoying, but subsequent
retries will connect to a surviving server. Like I said not so nice, but
works...

Regards,

Raj




-----Original Message-----
From: paul_lemonidis@xxxxxxxxxxx [mailto:paul_lemonidis@xxxxxxxxxxx]
Sent: February 01, 2002 5:39 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Cluster technologie ?


http://www.ISAserver.org


Hi guys

But DNS round robin doesn't provide fault tolerance??

Paul Lemonidis.


----- Original Message -----
From: "Paul Crisp" <PCrisp@xxxxxxxxxxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Friday, February 01, 2002 6:28 AM
Subject: [isalist] RE: Cluster technologie ?


> http://www.ISAserver.org
>
>
> Thats what i'm using at the moment, although I was looking for something a
> bit more solid
>
> Paul Crisp
> Snr Network Support Analyst
>
> Tel No : 020 7 827 5201
> Fax No: 020 8 330 7051
>
>
> -----Original Message-----
> From: Periyasamy, Raj [mailto:psraj@xxxxxxxxxxxx]
> Sent: 01 February 2002 14:25
> To: [ISAserver.org Discussion List]
> Subject: [isalist] RE: Cluster technologie ?
>
>
> http://www.ISAserver.org
>
>
> Have you looked into DNS round robin method. This may work for you.
>
> Regards,
>
> Raj
>
>
>
>
> -----Original Message-----
> From: Paul Crisp [mailto:PCrisp@xxxxxxxxxxxxxxxxx]
> Sent: February 01, 2002 9:23 AM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] RE: Cluster technologie ?
>
>
> http://www.ISAserver.org
>
>
> Unfortunately in my setup we have two offices connected via routers and a
> leased line, and 2 different subnets.
>
> Both offices have ISA servers, although 1 is for outgoing access and the
> other is primarily for incoming access, although can be used as a backup
> incase outgoing access server crashes.
>
> Paul Crisp
> Snr Network Support Analyst
>
> Tel No : 020 7 827 5201
> Fax No: 020 8 330 7051
>
>
> -----Original Message-----
> From: Periyasamy, Raj [mailto:psraj@xxxxxxxxxxxx]
> Sent: 01 February 2002 14:18
> To: [ISAserver.org Discussion List]
> Subject: [isalist] RE: Cluster technologie ?
>
>
> http://www.ISAserver.org
>
>
> You can use arrays too. The specific reason why I did not use arrays is
> because arrays require Firewall client software to be installed in all
> workstations. Arrays also make use of CARP for cache lookup, this is a
plus.
> However, if you dont want to use FW client in all workstations, NLB is a
> good choice.
>
> Regards,
>
> Raj
>
>
>
>
> -----Original Message-----
> From: Paul Drumm [mailto:P.Drumm@xxxxxxxxxx]
> Sent: February 01, 2002 9:16 AM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] RE: Cluster technologie ?
>
>
> http://www.ISAserver.org
>
>
> I thought you could put isa servers in an array and that the array would
> take care of this?  Any drawback to this compared to the NLB?
>
> -----Original Message-----
> From: Periyasamy, Raj [mailto:psraj@xxxxxxxxxxxx]
> Sent: Friday, February 01, 2002 9:10 AM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] RE: Cluster technologie ?
>
>
> http://www.ISAserver.org
>
>
> It's a feature available in Advanced Server. I have two identical ISA
> servers. both are load balanced with NLB. Users access the ISA server
> using
> its virtual name. NLB server automatically divides the load between the
> 2
> servers, and in case if one server fails, all users are moved to the
> surviving server.
>
> Regards,
>
> Raj
>
>
>
>
> -----Original Message-----
> From: Paul Crisp [mailto:PCrisp@xxxxxxxxxxxxxxxxx]
> Sent: February 01, 2002 9:08 AM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] RE: Cluster technologie ?
>
>
> http://www.ISAserver.org
>
>
> How do you use the NLB, is it a feature of Win2000 Advanced Server, or
> is it
> available in Win2000 Server
>
> Paul Crisp
> Snr Network Support Analyst
>
> Tel No : 020 7 827 5201
> Fax No: 020 8 330 7051
>
>
> -----Original Message-----
> From: Periyasamy, Raj [mailto:psraj@xxxxxxxxxxxx]
> Sent: 01 February 2002 14:03
> To: [ISAserver.org Discussion List]
> Subject: [isalist] RE: Cluster technologie ?
>
>
> http://www.ISAserver.org
>
>
> I use NLB for load balancing two of my ISA servers. Users are
> automatically
> moved to the other server in case if one fails. However, NLB does not
> provide fault tolerance for service failures. For this you may combine
> the
> Service recovery feature of Windows 2000 and NLB to achieve some level
> of
> fault tolerance and recovery.
>
> Regards,
> Raj
>
>
> -----Original Message-----
> From: Philippe [mailto:pmathon@xxxxxxxxxxxxxx]
> Sent: February 01, 2002 5:51 AM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] Cluster technologie ?
>
>
> http://www.ISAserver.org
>
>
> Hi all of you,
>
> Could someone tell me if ISA Server can be use in a Windows 2000 cluster
> technologie. The fact is that I want to my users not be deconnected if
> the
> ISA Server fall down !
>
> Thanks in advance.
>
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