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Community Member

Bundling DS3's

We are getting two point to point 45mb DS3's and are installing PA-2T3+ cards in 7206 routers at each end location. What I want to know is if we can bundle these two DS3's together to get a 90mb single virtual pipe instead of the two discrete 45mb links.

We can do this sort of thing with T1's where we PPP multilink a couple of 1.5MB T1's together to get a 3.0mb pipe. I dont want to take individual channels on the DS3 and multilink them like we do to the T1's because with the 64 channels the overhead would be ridiculous. I doubt it would work at all.

Does anyone have any suggestions? Is there a technology on the routers that will allow this to happen? Would Virtual Templates do anything for us?

Thanks for the help!

James

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Accepted Solutions
Cisco Employee

Re: Bundling DS3's

It will work. You can bundle two T3s togather using ppp multilink.

Link two serial interface under one multilink group. Configure the same way as you configure the T1 lines.

4 REPLIES
Cisco Employee

Re: Bundling DS3's

It will work. You can bundle two T3s togather using ppp multilink.

Link two serial interface under one multilink group. Configure the same way as you configure the T1 lines.

Community Member

Re: Bundling DS3's

Thanks for the reply. I will let you know that I did open a TAC case on it and was told that it was not possible. I think the engineer thought I was talking about PPP Multilinking each of the individual T1 lines.

Thanks again!

Community Member

Re: Bundling DS3's

If both ends of your 2xDS3 connections will be terminated on the same router,

just enable ip cef and configure per packet load-balancing on the interfaces involved.

Community Member

Re: Bundling DS3's

I have a question about CEF forwarding then. If I enable per packet forwarding will I get the full 90MB of bandwidth when I download or will I just get load balancing. I seem to remember somewhere reading that the CEF forwarding does not aggregate the bandwidth, it just load balances.

Let me know what you think.

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