[c-nsp] Bonded DSL with Cisco 1800/877's

Tue Oct 28 23:06:05 EDT 2008

Maarten, awesome configs and I thank you very much for those... great
resource.

>From the other perspective... do you, or anyone else know, about what is
required on the ISP's end to do multi-link?

We take DSL tails from multiple providers and they land on our 7200 LNS.  Is
there any specific config I have to do to allow/support ppp multi-link
services?

...Skeeve

-----Original Message-----
From: Moerman, Maarten [mailto:m.moerman at marktplaats.nl] 
Sent: Wednesday, 29 October 2008 11:13 AM
To: td_miles at yahoo.com; cisco-nsp at puck.nether.net; skeeve at skeeve.org
Subject: RE: [c-nsp] Bonded DSL with Cisco 1800/877's

The previous company i've worked for, i did setup bonding/bundling on cisco
1841's and cisco 28xx..

I've made templates of those configuration files, I see they did change some
things in those files, but here they are:
ftp://dl.solcon.nl/pub/dsl/configs/Cisco/

I think some people of solcon are also on this list (Rinse?) maybe they can
post an example of how the virtual-template is being done on the NRP's
(don't have access anymore :) )

Maarten

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net on behalf of Tony
Sent: Wed 10/29/2008 1:01 AM
To: cisco-nsp at puck.nether.net; skeeve at skeeve.org
Subject: Re: [c-nsp] Bonded DSL with Cisco 1800/877's

Skeeve,

Being in the same country as you, I know all about your problems with DSL
and what you're trying to achieve :)

We don't worry about an 1800, just have two 877 CPE's. On the 877 that is
the default gateway for the site, it has routes like this:

ip route 0/0 dialer1
ip route 0/0 lan_ip_of_other_877

The other 877 just has a single static route to the dialer interface.

In the central site, we have the same, two equal cost routes pointing to the
IP address of the dialer interface/IP of each the two 877's.

It seems to work ok and also has the benefit that if one link goes down you
can adjust a few routes and push everything onto the one remaining link.

As per the article linked by a previous poster:
http://blog.ioshints.info/2008/09/load-balancing-quirks.html

You need to remember that traffic between two hosts (on either end of the
link) will only be routed over ONE of the links at a time. This means that a
single host doing a large transfer will only max out ONE of the links and
not see the full bandwidth (make sure you are VERY clear to your customer
about this aspect).

We tend to use this a lot where we have branch offices that are doing
Citrix/MSTSC over the link and so there are lots of smaller bandwidth
traffic flows that balance fairly well across the two links. They outgrow a
512/512 link and as you well know, there is nothing to upgrade to in a lot
of cases.

regards,
Tony.

> Not having the time/budget to research the full
> implications myself I am
> approaching the list for advice.

Making excuses for your laziness isn't a good way to start a request asking
for help ;)

--- On Wed, 29/10/08, Skeeve Stevens <skeeve at skeeve.org> wrote:

> From: Skeeve Stevens <skeeve at skeeve.org>
> Subject: [c-nsp] Bonded DSL with Cisco 1800/877's
> To: cisco-nsp at puck.nether.net
> Date: Wednesday, 29 October, 2008, 12:11 AM
> Hey all,
> 
> Not having the time/budget to research the full
> implications myself I am
> approaching the list for advice.
> 
> In Australia we can do either ADSL, ADSL2/2+ or SHDSL for
> the most part.
> 
> I have a client wanting more bandwidth than any single of
> these connections
> can provide, without the availability of any other
> offering.
> 
> The aim - to provide as much bandwidth as possible using
> ADSL technologies -
> 2, 3, or 4 (would need a 2811?), but mostly 2 would be
> fine.
> 
> I am faced with a choice.
> 
> A Cisco 1811 with 2 (or more - limit 4?) 877's in
> bridge mode or equal
> weighted routing
> 
> Or
> 
> A Cisco 1841 (or 2800 equiv) with 2 * HWIC-1ADSL cards
> 
> Notes:
> -	The services will be going into the same DSL provider
> -	The services are delivered to the LNS as L2TP connections
> -	We managed both ends - the end customer equipment, and
> the ISP's
> LNS's (Cisco 7200G2)
> 
> I've never done 'bonded' or 'ppp
> multi-link?' with any of the above
> hardware.. the last time was many years ago with
> multi-linked 28.8 modems.
> 
> Any thoughts or advice on the above? From the perspective
> of either the
> clients end, or the ISP's end or both.
> 
> Thanks in advance guys.
> 
> --
> Skeeve Stevens, RHCE
> skeeve at skeeve.org / www.skeeve.org
> Cell +61 (0)414 753 383 / skype://skeeve
> 
> eintellego - skeeve at eintellego.net - www.eintellego.net 
> --
> I'm a groove licked love child king of the verse 
> Si vis pacem, para bellum
> 
> 
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