Config. of Multi Link Frame Relay

Posted on 2003-11-17
Last Modified: 2012-05-04
I have a CISCO 2600 series router.  I need to configure it for Multi Link Frame Relady.  My telco tells me that my equipment has to support the FRF 16 standard in order to work.  My question is can I do this with regular CSU's?  Do I need something different even though my router supports this standard?  Thanks.
Question by:johnpatbullock
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2

Expert Comment

ID: 9769767
FRF 16 is standard of Frame Relay Fragmentation ...

Cisco 2600 series have support for Multilink Frame Relay ...

Multilink Frame Relay feature enables you to create a virtual interface called a bundle or bundle interface. The bundle interface emulates a physical interface for the transport of frames. The Frame Relay data link runs on the bundle interface, and Frame Relay virtual circuits are built upon it.

The bundle is made up of multiple serial links, called bundle links. Each bundle link within a bundle corresponds to a physical interface. Bundle links are invisible to the Frame Relay data-link layer, so Frame Relay functionality cannot be configured on these interfaces. Regular Frame Relay functionality that you want to apply to these links must be configured on the bundle interface. Bundle links are visible to peer devices. The local router and peer devices exchange link integrity protocol control messages to determine which bundle links are operational and to synchronize which bundle links should be associated with which bundles.

Configuration is not that simple ... kindly visit the link below to configure you multi link on 2600 ...

Sheeraz Ahmed

Author Comment

ID: 9771225
Thank you very much, it seems that your answer is in regards to the router interfaces.  If this is the case, does the csu config not matter?  No special csu is needed?  What happens at this connection for multilink frame relay?  Thanks for the help.

Accepted Solution

sheahmed earned 500 total points
ID: 9772008
i think csu doesnt matter, but you need another serial to configure multi-link, as this phenomenon include more than one physical interface ... you can find it on cisco page which i forwarded, you can find a little in the config below ...

interface mfr0
 frame-relay multilink bid BUNDLE-A
interface serial0
 encapsulation frame-relay mfr0
interface serial1
 encapsulation frame-relay mfr0

can we close this question? discussion may proceed ...

Author Comment

ID: 9772265
I understand that I need two physical interfaces.  What I'm trying to make sure of is do I need to do anything special for the csu's?  Can I just use regular one's like Adtran ace's?

Expert Comment

ID: 9774269
i think Its not depending on the physical media or the devices you are using, if both ends are supportive to mfr then go ahead with the sample config ...

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In the world of WAN, QoS is a pretty important topic for most, if not all, networks. Some WAN technologies have QoS mechanisms built in, but others, such as some L2 WAN's, don't have QoS control in the provider cloud.
I recently attended Cisco Live! in Las Vegas, a conference that boasted over 28,000 techies in attendance, and a week of hands-on learning hosted by a solid partner with which Concerto goes to market.  Every year, Cisco displays cutting-edge technol…
After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Suggested Courses

729 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question