[c-nsp] combining multiple dsl lines

[Ben Steele]

If you really want to use route-maps to force your traffic down a certain 
interface at least use it with verify-availability incase your hop goes down 
so you have a back up path, no point forcing traffic down a dsl line that 
has died.

http://www.cisco.com/en/US/docs/ios/12_3t/12_3t4/feature/guide/gtpbrtrk.html


----- Original Message ----- 
From: "Dan Letkeman" <danletkeman at gmail.com>
To: "Ben Steele" <ben.steele at internode.on.net>; <cisco-nsp at puck.nether.net>
Sent: Thursday, July 24, 2008 7:42 AM
Subject: Re: [c-nsp] combining multiple dsl lines


> The adsl connections are PPPoE and they do not support multilink.  I
> am using nat on the router as well.
>
> I guess I will stick with route-map's for now as I know how to
> configure it and it works well in this configuration.
>
> Thanks for the info!
> Dan.
>
> On Tue, Jul 22, 2008 at 11:18 PM, 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
>>
>> On 23/07/2008, at 1:39 PM, Dan Letkeman wrote:
>>
>>> I have a customer that is wanting to combine 4 adsl connection through
>>> one router.  In the past I have setup systems where I have taken
>>> groups of ip's from the internal network and have route-map'd them to
>>> different adsl connections.  Is there a way to "combine" the dsl
>>> connections or is using route-map's still the better way to go?
>>>
>>> Thanks,
>>> Dan.
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>>
>>
>