Re: Multiple T1 Lines

timpotter · ‎02-13-2003

Our company uses Qwest as our VPN WAN provider. We plan to add a second T1 line to qwest at one of our locations. The question is what is the best way to do that? Qwest suggested using a Tasman router to bond the 2 lines but we'd like to stay Cisco. I need to know the minimun router we can use (1700?) and how to set it up. Can you just get a two port T1 card and bond those two ports together? Should we use HSRP and two routers that both connect to Qwest? I think the preferred way (for management) is to have one 3MB pipe. Any suggestions would be greatly appreciated!

Thanks,

Tim

donewald · ‎02-13-2003

Tim,

Multilink on the Cisco devices will get you what you need. Pls see the following URL for example config:

http://www.cisco.com/en/US/partner/tech/tk713/tk507/technologies_configuration_example09186a0080093c1d.shtml

Hope this helps,

Don

tepatel · ‎02-13-2003

You can use 1700 router with WIC-2T card which supports two serial T1 interface. Here is the url for that.

http://www.cisco.com/warp/public/107/wic-2t.shtml

You can bundle those two serial interface togather to get the aggregated thruput.

Here is the link which discuss that

http://www.cisco.com/univercd/cc/td/doc/product/aggr/10000/10ksw/mlppos.htm

timpotter · ‎02-13-2003

Well, I see know how we can get it done, but Qwest has told us they don't support Cisco for bonding lines. That's no good...

thisisshanky · ‎02-13-2003

Perhaps you should play tactics, to get what you want from Qwest. You know what I mean.

Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus

timpotter · ‎02-13-2003

Is it possible to set up Multilink between a Cisco Router and Nortel Shasta box?

Or do they just not want to do it?

tepatel · ‎02-13-2003

YES..it is possible. Multilink PPP is supported by Nortel too. Config on cisco will remain the same.. So you just need to see how can you configure that n Nortel box.

t.baranski · ‎03-09-2003

For something as standardized as Multilink PPP it's hard to imagine Qwest refusing to support such a setup with CPE equipment from the market leader. If this is indeed the case, CEF is probably your next best bet. You can load balance with CEF via per-destination or per-packet -- the latter is only recommended if both of your T1's terminate at the same Qwest router.

tepatel · ‎02-13-2003

Quest shold not care about where you terminate the line..Am i right?

bhaase · ‎02-14-2003

Forget multilink PPP. CEF is the best way to implement load balancing in my experience. It is much simpler to setup.

Check out

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/switch_c/xcprt2/xcdcefc.htm

bbauguess · ‎03-08-2003

Do you have a sample config using two WIC T1 cards with 1 fast-ethernet on a 1760 ?

dustin.yates · ‎03-09-2003

Presuming you want a CEF example when using static routes to your provider-- also don't remember off the top of my head of you need an extra command to make use of the multiple paths:

ip cef

interface Serial0

ip add 1.1.1.1 255.255.255.252

ip load-sharing per-packet

interface Serial1

ip add 1.1.1.5 255.255.255.252

ip load-sharing per-packet

ip route 0.0.0.0 0.0.0.0 1.1.1.2

ip route 0.0.0.0 0.0.0.0 1.1.1.6

You want to enable per packet load balancing to attempt a 50/50 split of the lines. Also, it works best if the lines terminate at the same router on the other end.