Solved

F/R Circuits possible clocking issue?

Posted on 2003-10-21
3
373 Views
Last Modified: 2008-02-26
I have a Cisco 4700 that is feeding F/R (yes F/R Switching is activated) to a remote router (Cisco 1601 w/WIC-T1-DSU). On the 4700 side we are using an Adtran Smart16e Shelf w/ V.35 TSU cards. The 4700 is set to FRAME-RELAY INTF-TYPE DCE and that is required to bring the connection up. I have the local end (Adtran) set to CLOCK SOURCE NETWORK and DTE TX CLOCK INT-INV. The 1601 is set to CLOCK SOURCE LINE. This is our own infrastructure of copper so there is no Qwest involved to provide the clocking on the circuit. The circuit contains to go up and down many times a day. This configuration seems to be working with other circuits but I am not sure on whether or not the clocking is set up right. How do I set up either the Adtran or the 1601 to be the master clock source? Or...how do I insert a clock source to the network? Do I need to use the CLOCK RATE command on both ends? FYI...Cisco TAC has cleared the configs on both sides as "working". I know it's a clocking issue but not sure where to start.
0
Comment
Question by:V2POWR
[X]
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 Comments
 
LVL 7

Expert Comment

by:NicBrey
ID: 9591574
Hi there.
On your router that is providing the clocking (F/R switch), you need the "clock rate <rate>"  command.

http://www.cisco.com/en/US/tech/tk713/tk237/technologies_configuration_example09186a0080094a3c.shtml
0
 
LVL 8

Accepted Solution

by:
scraig84 earned 250 total points
ID: 9591981
>>Originally posted by NicBrey
>Hi there.
>On your router that is providing the clocking (F/R switch), you need the "clock rate <rate>"  command.

That's only true if you don't have a CSU/DSU in the mix and is not an absolute.  The main issue here is that SOMETHING has to be providing clock.  I would set up the Adtran to use it's own clock (hence provide clocking for all other devices).  The 4700 being serial will expect clocking to come from it's CSU/DSU and the 1601 is already expecting from the line as well.  Therefore, if you switch the Adtran to provide clock, you don't have to make any other changes.  If you were to follow NicBrey's advice, you'd have to change it as well to get clocking from the 4700.  I think changing the Adtran is your quickest and cleanest solution.
0
 
LVL 17

Expert Comment

by:John Gates,
ID: 9617746
Setting the clock to internal is the way to go.


D
0

Featured Post

Simple, centralized multimedia control

Watch and learn to see how ATEN provided an easy and effective way for three jointly-owned pubs to control the 60 televisions located across their three venues utilizing the ATEN Control System, Modular Matrix Switch and HDBaseT extenders.

Question has a verified solution.

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

Data center, now-a-days, is referred as the home of all the advanced technologies. In-fact, most of the businesses are now establishing their entire organizational structure around the IT capabilities.
This article is a collection of issues that people face from time to time and possible solutions to those issues. I hope you enjoy reading it.
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…

752 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