Re: WAN Connection using 2 Paths, one for up one for Down?

The main reason for the T1 was to be able to send Backups of the Office Data Offsite.
Though the Remote office is really 3 homes. So the existing 1.5meg T1 is used for Internet Access mostly.

We were thinking to use the Cable/DSL for all Internet Traffic.
Use the T1 for all Inter Office Traffic.

Though it would be nice at Night when the Backups happen, to take advantage of the 6meg Intetnet Connection and push the backup data to the remote location via the internet (HQ hads a 6Meg (4T1s) Connection to the Internet too).

So taking Time out of the equation, Can I have HQ send all traffic to remtoe site via Internet/VPN
Have remote Site send All Traffic to the Office via Point to Point T1
Have remote Site use Local Cable/DSL for all Internet traffic.


Seems like when we had a Remote Office in Sacramento, the Route the Packets took to get to the office went pretty much directly there. Though the Route it took to get to HQ went a state away as it connected via OC3 or something.

Thanks for eveyone's help...

Scott<-



"Trendkill" <jpmason@xxxxxxxxx> wrote in message news:1175599966.303450.252460@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Apr 2, 7:46 pm, rober...@xxxxxxxxxxxx (Walter Roberson) wrote:
In article <OgdQh.2066$5e2...@xxxxxxxxxxxxxxxxxxxxxxxxxx>,

Scott Townsend <scooter...@xxxxxxxxxxxxxxxx> wrote:
>We have a remote office that is currently connected via Point to Point >T1
>via T1. SO we have the 1.5meg connection.
>We'd like to get a DSL/Cable Internet connection for Faster Download >access.
>We have a PIX that We'd like to add to the Mix. (already have one at HQ)
>What would be the best way to do the routing for this. I would want all
>upload traffic from the remote office to use the T1 to the Office and >All
>traffic from the Office to use the Site to Site VPN on the Pix to the >Remote
>Office.

If all the traffic from the remote office is to go to HQ, and all
traffic from HQ is to go to the remote office, then where does
Internet access fit in? Is it to be handled independantly at the
two offices, or is one office supposed to forward Internet-bound
traffic to the other office for processing? If it is to be
forwarded, then you would need PIX 7.x in order to get the forwarding
working.

If you intend to split traffic, two unidirectional branches, then
you need to recombine the traffic before it enters the PIX, or else
the PIX will only see one side of the conversation and will not be
able to firewall properly (and so will drop all the TCP conversations.)
The recombining is going to require a router of some kind.

Once the router is in place, directing the traffic unidirectionally
would be a simple static default route pointing through the desired ISP.

On the other hand, if you want the configurations to notice that
one of the paths has gone non-functional (DSL and cable don't have
the greatest of reliability), then your configuration gets much more
difficult!

Using two unidirectional links is also a waste of bandwidth. What
you'd prefer to do is use something like OSPF with Unequal Cost Routes
so that the two possible routes are used in proportion to their capacities.

Not to mention Frame T1s are 1.5 mbit full duplex (we'll see if this
turns into an argument as it has in the past). So while I won't say
that applications will be impacted if one side gets eaten up, I agree
that load balancing with your provider is what you want to do, not
split up vs. down. But given the ambiguity in internet vs. site to
site connections, I'm not really sure what you are trying to do.


.

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