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Home > Archive > microsoft.public.cert.exams.mcse > January 2004 > What is a heartbeart network?
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What is a heartbeart network?
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| CCNAwan 2004-01-17, 2:23 pm |
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Can anyone explain to me what a heartbeat network is?
Thank you,
Mike Hurley
CCNAwan
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| Rowdy Yates 2004-01-17, 3:23 pm |
| CCNAwan <CCNAwan.106xaa@mail.mcse.ms> wrote in
news:CCNAwan.106xaa@mail.mcse.ms:
>
> Can anyone explain to me what a heartbeat network is?
>
> Thank you,
>
> Mike Hurley
>
>
> CCNAwan
> ------------------------------------------------------------------------
> Posted via http://www.mcse.ms
> ------------------------------------------------------------------------
> View this thread: http://www.mcse.ms/message294302.html
>
Sure. I can explain Mike. That's when all your workstations are hooked with
cat5 cable via atm switch and/or hub to a "little baboon heart".
ha..ha...sorry. i am just having fun with you.
actually, i have not heard or come across this term in any of the books i
have read thus far. and i am a pretty serious "geek" bookworm.
i notice you are a CCNA - did you see this term in a Cisco book or
something?
--
Rowdy Yates
I am Against-TCPA
http://www.againsttcpa.com
| |
| azimuth40 2004-01-17, 4:08 pm |
| quote:
Originally posted by CCNAwan
Can anyone explain to me what a heartbeat network is?
Thank you,
Mike Hurley
CCNAwan
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Sounds like you ran across or are looking into clustering.
http://support.microsoft.com/?id=258750 | |
| Larry Samuels 2004-01-17, 4:23 pm |
| Heartbeat comes into play when you are clustering servers (I think).
It is a keep-alive signal for the connection.
Can't say for sure since that particular book is 3rd in line for studying.
--
Larry Samuels
Unofficial FAQ for Windows Server 2003 at
http://home.earthlink.net/~larrysamuels/WS2003FAQ.htm
"Rowdy Yates" <rowdy.yates@no-spam.lycos.com> wrote in message
news:Xns9473964CC316Crowdyyate
snospamlyco@207.46.248.16...
> CCNAwan <CCNAwan.106xaa@mail.mcse.ms> wrote in
> news:CCNAwan.106xaa@mail.mcse.ms:
>
>
> Sure. I can explain Mike. That's when all your workstations are hooked
> with
> cat5 cable via atm switch and/or hub to a "little baboon heart".
>
> ha..ha...sorry. i am just having fun with you.
>
> actually, i have not heard or come across this term in any of the books i
> have read thus far. and i am a pretty serious "geek" bookworm.
>
> i notice you are a CCNA - did you see this term in a Cisco book or
> something?
>
>
> --
> Rowdy Yates
> I am Against-TCPA
> http://www.againsttcpa.com
| |
| azimuth40 2004-01-17, 4:59 pm |
| or more to Larry's point
Heartbeat
A heartbeat is a message sent between machines at a regular interval of the order of seconds. If a heartbeat isn't received for a time -- usually a few heartbeat intervals -- the machine that should have sent the heartbeat is assumed to have failed. A heartbeat protocol is generally used to negotiate and monitor the availability of a resource, such as a floating IP address. Typically when a heartbeat starts on a machine it will perform an election process with other machines on the heartbeat network to determine which, if any machine owns the resource. On heartbeat networks of more than two machines it is important to take into account partitioning, where two halves of the network could be functioning but not able to communicate with each other. In a situation such as this it is important that the resource is only owned by one machine, not one machine in each partition.
As a heartbeat is intended to be used to indicate the health of a machine it is important that the heartbeat protocol and the transport that it runs on is as reliable as possible. Effecting a fail-over because of a false alarm may, depending on the resource, be highly undesirable. It is also important to react quickly to an actual failure, so again it is important that the heartbeat is reliable. For this reason it is often desirable to have heartbeat running over more than one transport, for instance an ethernet segment using UDP/IP, and a serial link. | |
| Andy Barkl 2004-01-17, 5:23 pm |
| "CCNAwan" <CCNAwan.106xaa@mail.mcse.ms> wrote in message
news:CCNAwan.106xaa@mail.mcse.ms...
>
> Can anyone explain to me what a heartbeat network is?
>
> Thank you,
>
> Mike Hurley
>
>
> CCNAwan
> ------------------------------------------------------------------------
> Posted via http://www.mcse.ms
> ------------------------------------------------------------------------
> View this thread: http://www.mcse.ms/message294302.html
Ethernet 802.3 uses what some call a "heartbeat" or keep alive which is sent
every 10 seconds.
| |
| |{evin 2004-01-17, 6:23 pm |
| On Sat, 17 Jan 2004 16:59:07 -0600, azimuth40
<azimuth40.1078oa@mail.examnotes.net> wrote:
>
>or more to Larry's point
>
>Heartbeat
>A heartbeat is a message sent between machines at a regular interval of
>the order of seconds. If a heartbeat isn't received for a time --
>usually a few heartbeat intervals -- the machine that should have sent
>the heartbeat is assumed to have failed. A heartbeat protocol is
>generally used to negotiate and monitor the availability of a resource,
>such as a floating IP address. Typically when a heartbeat starts on a
>machine it will perform an election process with other machines on the
>heartbeat network to determine which, if any machine owns the resource.
>On heartbeat networks of more than two machines it is important to take
>into account partitioning, where two halves of the network could be
>functioning but not able to communicate with each other. In a situation
>such as this it is important that the resource is only owned by one
>machine, not one machine in each partition.
>
>As a heartbeat is intended to be used to indicate the health of a
>machine it is important that the heartbeat protocol and the transport
>that it runs on is as reliable as possible. Effecting a fail-over
>because of a false alarm may, depending on the resource, be highly
>undesirable. It is also important to react quickly to an actual
>failure, so again it is important that the heartbeat is reliable. For
>this reason it is often desirable to have heartbeat running over more
>than one transport, for instance an ethernet segment using UDP/IP, and
>a serial link.
>
>
>azimuth40
It is also on a separate network... the heartbeat network. Separate
nics, separate wiring, separate switches and routers..
| |
| Rowdy Yates 2004-01-18, 2:23 am |
| Organization: ROwdy Yates Inc.
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For CCNAwan,
Recommended Private "Heartbeat" Configuration on a Cluster Server
Microsoft Knowledge Base Article - 258750
http://support.microsoft.com/default.aspx?
scid=http://support.microsoft.com:80/support/kb/articles/q258/7/50.asp&No
WebContent=1
cool. i learnt something new today.
:-)
"|{evin" <You@dont.need> wrote in
news:noej00ld45s48fgvvkeeou1th
gku995srg@4ax.com:
> On Sat, 17 Jan 2004 16:59:07 -0600, azimuth40
> <azimuth40.1078oa@mail.examnotes.net> wrote:
>
>
> It is also on a separate network... the heartbeat network. Separate
> nics, separate wiring, separate switches and routers..
--
Rowdy Yates
I am Against-TCPA
http://www.againsttcpa.com
| |
| CCNAwan 2004-01-18, 3:23 pm |
|
thanks to all. Makes sense now.
Mike
CCNAwan
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