Aggregating upstream bandwidth

I've been using a RedHat 7.2 box to drive my ADSL line for a couple of years
now, lovely jubbly everything's been cool.
Now I'd like to run a webserver and the 256kbps upstream on my line is
looking a little weedy. Ideally I'd like to double this up but an SDSL
package will cost four times as much as my current one.

So.....what about getting a second ADSL line installed (with a second phone
line obviously) and bonding the available bandwidth on my firewall ? I'm not
bothered about download speeds, just upstream. I suppose I could setup a DNS
round-robin but I was looking for something a bit more sophisticated.

Using linux (or anything else) could I bond two ADSL lines and get a virtual
512kbps upstream pipe ?

"Draxen" <(E-Mail Removed)> wrote in message
news:3f700de8$0$11000$(E-Mail Removed)
> I've been using a RedHat 7.2 box to drive my ADSL line for a couple
> of years now, lovely jubbly everything's been cool.
> Now I'd like to run a webserver and the 256kbps upstream on my line is
> looking a little weedy. Ideally I'd like to double this up but an SDSL
> package will cost four times as much as my current one.
>
> So.....what about getting a second ADSL line installed (with a second
> phone line obviously) and bonding the available bandwidth on my
> firewall ? I'm not bothered about download speeds, just upstream. I
> suppose I could setup a DNS round-robin but I was looking for
> something a bit more sophisticated.
>
> Using linux (or anything else) could I bond two ADSL lines and get a
> virtual 512kbps upstream pipe ?


Short answer is yes, in Linux or using moderately expensive gear.
Google Groups link here http://tinyurl.com/oc2k
And I am planning to test a cheap Edimax router that looks like it might do
the job but only when I find the time.

S. Althaf

Draxen <(E-Mail Removed)> wrote:

[Bonding ADSL Lines]
> So.....what about getting a second ADSL line installed (with a second
> phone line obviously) and bonding the available bandwidth on my firewall
> ? I'm not bothered about download speeds, just upstream. I suppose I
> could setup a DNS round-robin but I was looking for something a bit more
> sophisticated.

You want to load-balance between interfaces, not between
servers, so DNS round-robin does not help with your network
configuration and you really need something more sophisticated.


> Using linux (or anything else) could I bond two ADSL lines and get a
> virtual 512kbps upstream pipe ?

This should be possible, see the following link:
http://lartc.org/howto/lartc.rpdb.multiple-links.html


Ciao, Horst
--
»When pings go wrong (It hurts me too)« E.Clapton/E.James/P.Tscharn

"Horst Knobloch" <(E-Mail Removed)> wrote in message
news:bkpaoh$16gc$(E-Mail Removed)...
> Draxen <(E-Mail Removed)> wrote:
>
> [Bonding ADSL Lines]
> > So.....what about getting a second ADSL line installed (with a second
> > phone line obviously) and bonding the available bandwidth on my firewall
> > ? I'm not bothered about download speeds, just upstream. I suppose I
> > could setup a DNS round-robin but I was looking for something a bit more
> > sophisticated.
>
> You want to load-balance between interfaces, not between
> servers, so DNS round-robin does not help with your network
> configuration and you really need something more sophisticated.

If each interface has a seperate IP address then surely a DNS round robin
would work, I'm not saying it'd be great load balancing but it should
function, shouldn't it ?

> > Using linux (or anything else) could I bond two ADSL lines and get a
> > virtual 512kbps upstream pipe ?
>
> This should be possible, see the following link:
> http://lartc.org/howto/lartc.rpdb.multiple-links.html

Thank you Horst, I think that'll do the job nicely to start with and also
give me a do-able learning curve to climb

Draxen <(E-Mail Removed)> wrote:

> "Horst Knobloch" <(E-Mail Removed)> wrote in message
> news:bkpaoh$16gc$(E-Mail Removed)...
>> Draxen <(E-Mail Removed)> wrote:
>>
>> [Bonding ADSL Lines]
>> > So.....what about getting a second ADSL line installed (with a second
>> > phone line obviously) and bonding the available bandwidth on my
>> > firewall ? I'm not bothered about download speeds, just upstream. I
>> > suppose I could setup a DNS round-robin but I was looking for
>> > something a bit more sophisticated.
>>
>> You want to load-balance between interfaces, not between
>> servers, so DNS round-robin does not help with your network
>> configuration and you really need something more sophisticated.
>
> If each interface has a seperate IP address then surely a DNS round robin
> would work, I'm not saying it'd be great load balancing but it should
> function, shouldn't it ?

In this case you need to deploy DNAT to direct the web traffic,
coming in on both interfaces, to your server. And I originally
thought that reversing DNAT in the outgoing direction would
break in the presence of two interfaces / default routes.

However in the meantime I think this should be no problem as
long as Linux uses the two default routes in a round-robin
fashion and your provider does no reverse path filtering.


>> > Using linux (or anything else) could I bond two ADSL lines and get a
>> > virtual 512kbps upstream pipe ?
>>
>> This should be possible, see the following link:
>> http://lartc.org/howto/lartc.rpdb.multiple-links.html
>
> Thank you Horst,

You are welcome.


> I think that'll do the job nicely to start with and also
> give me a do-able learning curve to climb

Jupp. :-)


Ciao, Horst
--
»When pings go wrong (It hurts me too)« E.Clapton/E.James/P.Tscharn

you'll need a second line anyway as SDSL doesn't permit voice and data at
the same time.

"Draxen" <(E-Mail Removed)> wrote in message
news:3f700de8$0$11000$(E-Mail Removed).. .
> I've been using a RedHat 7.2 box to drive my ADSL line for a couple of
years
> now, lovely jubbly everything's been cool.
> Now I'd like to run a webserver and the 256kbps upstream on my line is
> looking a little weedy. Ideally I'd like to double this up but an SDSL
> package will cost four times as much as my current one.
>
> So.....what about getting a second ADSL line installed (with a second
phone
> line obviously) and bonding the available bandwidth on my firewall ? I'm
not
> bothered about download speeds, just upstream. I suppose I could setup a
DNS
> round-robin but I was looking for something a bit more sophisticated.
>
> Using linux (or anything else) could I bond two ADSL lines and get a
virtual
> 512kbps upstream pipe ?
>