Line clock settings 2Mb leased line

Answered Question
Oct 11th, 2009

Hi

Believe it or not but a providor in Norway delivers not a clock signal in a point to point 2 Mb leased line.

What is now the best way to configure the clock setting on both routers ?

Normaly the config is; clock source internal But must you set that on both sides or only on one? And how do know that than both clocks are in sync ?

I have this problem too.
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Correct Answer by Giuseppe Larosa about 7 years 3 months ago

Hello Rene,

use clock source internal on one side and clock source line on the other side.

This should be fine.

>> And how do know that than both clocks are in sync ?

there is no direct way to see this you need to consider interface statistics over time if some type of interface errors don't increment over time clocking should be correct.

see

http://www.cisco.com/en/US/docs/internetworking/troubleshooting/guide/tr1915.html

for T1/E1

http://www.cisco.com/en/US/tech/tk713/tk628/technologies_tech_note09186a00800a758d.shtml

Hope to help

Giuseppe

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Correct Answer
Giuseppe Larosa Sun, 10/11/2009 - 22:09

Hello Rene,

use clock source internal on one side and clock source line on the other side.

This should be fine.

>> And how do know that than both clocks are in sync ?

there is no direct way to see this you need to consider interface statistics over time if some type of interface errors don't increment over time clocking should be correct.

see

http://www.cisco.com/en/US/docs/internetworking/troubleshooting/guide/tr1915.html

for T1/E1

http://www.cisco.com/en/US/tech/tk713/tk628/technologies_tech_note09186a00800a758d.shtml

Hope to help

Giuseppe

r.vanschendel Sun, 10/11/2009 - 22:16

Hi Giuseppe

Thanks for your time and the answer. It is what I expected, but now I am sure.

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