[c-nsp] combining multiple dsl lines

[Wayne Lee]

On Wed, Jul 23, 2008 at 5:18 AM, Ben Steele <ben.steele at internode.on.net> wrote:
> Depends a lot on the adsl connections, are they ppp ? does the remote end
> support multilink? if so then multilink ppp is a good option providing all 4
> lines are the same characteristics.
>
> Otherwise other options are cef load balancing, what type will depend on
> whether you are using NAT or not as you want to make sure the packet flow
> takes the right path, load balancing using the source/dest port algorithm
> works quite well though, probably wouldn't reccomend per packet over adsl.
>
> The route-map way is ok but wouldn't utilise the links as well as cef load
> balancing or ppp multlink could.
>
> Another option worth throwing in is the use of ip sla on your routes so as
> to remove them from the equation should one link go down, can also be done
> with the route-map using verify-availability on the next-hop option.
>
> Ben
>

We have used cef per packet with great success on PPPoA DSL links here
in the UK, we use radius to add/remove the extra routes when a
connection bounces. The CPE is a linux box which is not running any
NAT. Works for us


Wayne