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How to do a failsafe connection using TWO network links

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  How to do a failsafe connection using TWO network links bit-naughty@hotmail.com - 2013-01-23 07:23 -0800
    Re: How to do a failsafe connection using TWO network links unruh <unruh@invalid.ca> - 2013-01-23 17:28 +0000
    Re: How to do a failsafe connection using TWO network links Dale Dellutri <ddelQQQlutr@panQQQix.com> - 2013-01-23 18:24 +0000
    Re: How to do a failsafe connection using TWO network links Whiskers <catwheezel@operamail.com> - 2013-01-23 21:55 +0000
      Re: How to do a failsafe connection using TWO network links Jorgen Grahn <grahn+nntp@snipabacken.se> - 2013-01-24 08:26 +0000
        Re: How to do a failsafe connection using TWO network links unruh <unruh@invalid.ca> - 2013-01-24 17:13 +0000
        Re: How to do a failsafe connection using TWO network links bit-naughty@hotmail.com - 2013-01-29 22:55 -0800
          Re: How to do a failsafe connection using TWO network links Jorgen Grahn <grahn+nntp@snipabacken.se> - 2013-01-30 07:54 +0000
            Re: How to do a failsafe connection using TWO network links unruh <unruh@invalid.ca> - 2013-01-30 18:20 +0000
    Re: How to do a failsafe connection using TWO network links Joachim Gann <nomail@nodomain.net> - 2013-01-24 13:57 +0100

#1912 — How to do a failsafe connection using TWO network links

Hi,
I would like to connect TWO ISP links to my computer, and if one fails, let the other one take over - how do I do this?


Thanks.

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#1913

On 2013-01-23, bit-naughty@hotmail.com <bit-naughty@hotmail.com> wrote:
> Hi,
> I would like to connect TWO ISP links to my computer, and if one fails, let the other one take over - how do I do this?

You have your computer periodically test link 1 and when it fails, set
up the routing tables to use link 2

>
>
> Thanks.

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#1914

On Wed, 23 Jan 2013 10:23:06, bit-naughty@hotmail.com wrote:
> Hi,
> I would like to connect TWO ISP links to my computer, and if one 
> fails, let the other one take over - how do I do this?

I suggest doing it at the router level: Cisco RV042 or similar.

-- 
Dale Dellutri <ddelQQQlutr@panQQQix.com> (lose the Q's)

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#1915

On 2013-01-23, bit-naughty@hotmail.com <bit-naughty@hotmail.com> wrote:
> Hi, I would like to connect TWO ISP links to my computer, and if one
> fails, let the other one take over - how do I do this?
>
>
> Thanks.

Use a dual-connection router.  Business users often do this; any decent
computer hardware retailer will be able to advise you.

-- 
-- ^^^^^^^^^^
--  Whiskers 
-- ~~~~~~~~~~

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#1916

On Wed, 2013-01-23, Whiskers wrote:
> On 2013-01-23, bit-naughty@hotmail.com <bit-naughty@hotmail.com> wrote:
>> Hi, I would like to connect TWO ISP links to my computer, and if one
>> fails, let the other one take over - how do I do this?
>>
>>
>> Thanks.
>
> Use a dual-connection router.  Business users often do this; any decent
> computer hardware retailer will be able to advise you.

If he has two network interfaces with potential internet access, and a
decent OS, why should he buy external hardware?  That's another piece
of equipment to place somewhere, provide with power and manage using
an unfamiliar interface.

He doesn't say he's running a whole network, or that he has extreme
bandwidths.

The actual question: sorry. No doubt something in Linux handles this,
but I don't know *what*.  "Bonding" I'm familiar with, but that's of
no use here.

The "bring up interface #2 if #1 seems to have problems" suggestion
posted by someone works -- but presumably he wants some kind of
dynamic load distribution.

/Jorgen

-- 
  // Jorgen Grahn <grahn@  Oo  o.   .     .
\X/     snipabacken.se>   O  o   .

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#1918

On 2013-01-24, Jorgen Grahn <grahn+nntp@snipabacken.se> wrote:
> On Wed, 2013-01-23, Whiskers wrote:
>> On 2013-01-23, bit-naughty@hotmail.com <bit-naughty@hotmail.com> wrote:
>>> Hi, I would like to connect TWO ISP links to my computer, and if one
>>> fails, let the other one take over - how do I do this?
>>>
>>>
>>> Thanks.
>>
>> Use a dual-connection router.  Business users often do this; any decent
>> computer hardware retailer will be able to advise you.
>
> If he has two network interfaces with potential internet access, and a
> decent OS, why should he buy external hardware?  That's another piece
> of equipment to place somewhere, provide with power and manage using
> an unfamiliar interface.
>
> He doesn't say he's running a whole network, or that he has extreme
> bandwidths.
>
> The actual question: sorry. No doubt something in Linux handles this,
> but I don't know *what*.  "Bonding" I'm familiar with, but that's of
> no use here.
>
> The "bring up interface #2 if #1 seems to have problems" suggestion
> posted by someone works -- but presumably he wants some kind of
> dynamic load distribution.
>
> /Jorgen
>

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#1920

On Thursday, January 24, 2013 1:56:21 PM UTC+5:30, Jorgen Grahn wrote:


> If he has two network interfaces with potential internet access, and a
> 
> decent OS, why should he buy external hardware?  That's another piece
> 
> of equipment to place somewhere, provide with power and manage using
> 
> an unfamiliar interface.
> 



Yes, you're absolutely right.



> 
> 
> He doesn't say he's running a whole network, or that he has extreme
> 
> bandwidths.
> 
> 
> 
> The actual question: sorry. No doubt something in Linux handles this,
> 
> but I don't know *what*.  "Bonding" I'm familiar with, but that's of
> 
> no use here.
> 
> 
> 
> The "bring up interface #2 if #1 seems to have problems" suggestion
> 
> posted by someone works -- but presumably he wants some kind of
> 
> dynamic load distribution.
> 
> 
> 

Yes, I do - I want the data transfer to a particular computer on the other side to happen through both interfaces, so I get the combined bandwidth.

...and "bring up interface 2"......did you mean by a shell script or something? That won't do, it's video and audio which will be cast over the net, it has to be *seamless*, there can't be any stutters in the video.


Thanks a lot for your help Jorgen.

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#1921

On Wed, 2013-01-30, bit-naughty@hotmail.com wrote:
> On Thursday, January 24, 2013 1:56:21 PM UTC+5:30, Jorgen Grahn wrote:

Your news client generates broken/hard-to-read postings.
Please fix it.

>> If he has two network interfaces with potential internet access, and a
>> 
>> decent OS, why should he buy external hardware?  That's another piece
>> 
>> of equipment to place somewhere, provide with power and manage using
>> 
>> an unfamiliar interface.
>> 
>
>
>
> Yes, you're absolutely right.
>
>
>
>> 
>> 
>> He doesn't say he's running a whole network, or that he has extreme
>> 
>> bandwidths.
>> 
>> 
>> 
>> The actual question: sorry. No doubt something in Linux handles this,
>> 
>> but I don't know *what*.  "Bonding" I'm familiar with, but that's of
>> 
>> no use here.
>> 
>> 
>> 
>> The "bring up interface #2 if #1 seems to have problems" suggestion
>> 
>> posted by someone works -- but presumably he wants some kind of
>> 
>> dynamic load distribution.
>> 
>> 
>> 
>

> Yes, I do - I want the data transfer to a particular computer on the
> other side to happen through both interfaces, so I get the combined
> bandwidth.

If you want a single TCP connection to use both routes, that may be
even harder.  But check that technology ("something-routing") someone
else mentioned a few days ago -- it's the best response you've got
so far.

> ...and "bring up interface 2"......did you mean by a
> shell script or something? That won't do, it's video
...

It wasn't my idea; I was referring to someone else's reply.

/Jorgen

-- 
  // Jorgen Grahn <grahn@  Oo  o.   .     .
\X/     snipabacken.se>   O  o   .

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#1922

On 2013-01-30, Jorgen Grahn <grahn+nntp@snipabacken.se> wrote:
> On Wed, 2013-01-30, bit-naughty@hotmail.com wrote:
>> On Thursday, January 24, 2013 1:56:21 PM UTC+5:30, Jorgen Grahn wrote:
>
>> Yes, I do - I want the data transfer to a particular computer on the
>> other side to happen through both interfaces, so I get the combined
>> bandwidth.

That was also an additional requirement. That is bonding. You will not
get it. It is far too hard for your computer tofigure out which packet
goes wwhere and to recover from errors. 

>
> If you want a single TCP connection to use both routes, that may be
> even harder.  But check that technology ("something-routing") someone
> else mentioned a few days ago -- it's the best response you've got
> so far.
>
>> ...and "bring up interface 2"......did you mean by a
>> shell script or something? That won't do, it's video

Then it will never work. It takes a while to figure out that one route
has gone down. There is no message that is sent saying "the wire has
been cut" or "a fire has destroyed the router on this path". It must
wait to see what is happening and only after some timeout can it try the
other path. That will drop video. Install a dedicated line between the
two sites, but that will not prevent a truch or a backhoe from severing
the link. 

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#1917

On 23.01.2013 16:23, bit-naughty@hotmail.com wrote:
> Hi,
> I would like to connect TWO ISP links to my computer, and if one fails, let the other one take over - how do I do this?


google: multipath routing

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