DNS round robin is not fault tolerance. It's merely a way to provide additional connection points if one should fail to respond. A true "fault tolerance" solution doesn't force the client to make the routing decision as DNS RR does. Jim Harrison MCP(NT4, W2K), A+, Network+, PCG http://isaserver.org/authors/harrison/ Read the books! ----- Original Message ----- From: <paul_lemonidis@xxxxxxxxxxx> To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx> Sent: Friday, February 01, 2002 14:38 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. > > ------------------------------------------------------ > You are currently subscribed to this ISAserver.org Discussion List as: > psraj@xxxxxxxxxxxx > To unsubscribe send a blank email to $subst('Email.Unsub') > > ------------------------------------------------------ > You are currently subscribed to this ISAserver.org Discussion List as: > pcrisp@xxxxxxxxxxxxxxxxx > To unsubscribe send a blank email to $subst('Email.Unsub') > > ------------------------------------------------------ > You are currently subscribed to this ISAserver.org Discussion List as: > psraj@xxxxxxxxxxxx > To unsubscribe send a blank email to $subst('Email.Unsub') > > ------------------------------------------------------ > You are currently subscribed to this ISAserver.org Discussion List as: > p.drumm@xxxxxxxxxx > To unsubscribe send a blank email to $subst('Email.Unsub') > > ------------------------------------------------------ > You are currently subscribed to this ISAserver.org Discussion List as: > psraj@xxxxxxxxxxxx > To unsubscribe send a blank email to $subst('Email.Unsub') > > ------------------------------------------------------ > You are currently subscribed to this ISAserver.org Discussion List as: > pcrisp@xxxxxxxxxxxxxxxxx > To unsubscribe send a blank email to $subst('Email.Unsub') > > ------------------------------------------------------ > You are currently subscribed to this ISAserver.org Discussion List as: > psraj@xxxxxxxxxxxx > To unsubscribe send a blank email to $subst('Email.Unsub') > > ------------------------------------------------------ > You are currently subscribed to this ISAserver.org Discussion List as: > pcrisp@xxxxxxxxxxxxxxxxx > To unsubscribe send a blank email to $subst('Email.Unsub') > > ------------------------------------------------------ > You are currently subscribed to this ISAserver.org Discussion List as: paul_lemonidis@xxxxxxxxxxx > To unsubscribe send a blank email to $subst('Email.Unsub') > ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: jim@xxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')