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Webcast-Catalyst9k
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programming a 2621 for 3 x e1 as a single 6MB connection

Can any one help out with a sample config for this. I have to program a 2621 router with a wic-1t and wic-2t connected to three e1 lines so that it runs as a single 6mb interface. Any help appreciated

Thanks

5 REPLIES

Re: programming a 2621 for 3 x e1 as a single 6MB connection

I understand that you want to do do load-balancing on three links to increase bandwidth? This can be achieved by using an appropiate routing protocol like EIGRP or OSPF.

When you do not have the knowledge to configure all of this yourself, contact a Cisco certified partner or reseller. They need to earn their money too and in all honesty I think that this is a task that should be accomplished by a professional!

New Member

Re: programming a 2621 for 3 x e1 as a single 6MB connection

I tnink it could guide you.

Let me know if you need more help, is not a big deal to configure what you need.

http://www.cisco.com/en/US/tech/tk648/tk365/technologies_tech_note09186a0080094820.shtml

Regards

--

Alexis Fidalgo

Systems Engineer

AT&T Argentina

New Member

Re: programming a 2621 for 3 x e1 as a single 6MB connection

You can do it using " interface multilink" :

http://www.cisco.com/en/US/tech/tk713/tk584/technologies_configuration_example09186a00800a5efa.shtml

But be aware of the limitations. Take a look at the tables included in the following white paper: http://www.cisco.com/en/US/products/hw/modules/ps2033/products_white_paper09186a0080091d4b.shtml

As you can see, for example, U cannot implement Qos on the interface multilink.

New Member

Re: programming a 2621 for 3 x e1 as a single 6MB connection

How you implement this depends on what you plan to use the bundled link for and traffic patterns over it. There are several possible approaches, each with their advantages and disadvantages. For instance...

1. Do not bundle the links, but allow equal-cost multipath load-balancing across them. Probably the best approach for IP over the 3 serial links but may not be suitable if you have other protocols or bridged traffic to pass, or if the traffic mix doesn't lend itself to equal-cost load-balancing without disabling fast-switching.

2. Multilink virtual-template configuration. Easy to configure. Limited support for some IOS features. Increased processor overhead.

3. PPP Multilink. Easy to configure. Poor performance scalability to 6Mbit/s.

Hope this helps.

New Member

Re: programming a 2621 for 3 x e1 as a single 6MB connection

I think you need to configure a ppp multilink interface

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