[c-nsp] 2821 VWIC2-2MFT-T1/E1 clocking issue

[Stemberger, Gregory J [NTK]]

When we had this issue on the VWIC-V1 cards, which of course didn't have the "independent" command, we had some success with just changing the secondary T1/E1 to use internal timing assuming you have a circuit that is getting clocking from a PE directly of which can be changed to line timing.


Gregory Stemberger
Sprint Managed Services
Operations Engineering




-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Jay Hennigan
Sent: Wednesday, April 30, 2008 2:48 PM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] 2821 VWIC2-2MFT-T1/E1 clocking issue

Scenario:

Cisco 2821 router running 12.4(18)
VWIC2-2MFT-T1/E1    terminating E-1 connections from two ISPs.

Both are configured clock source line.

Both providers are sourcing clock, but apparently not in sync with each other.

Second E-1 on the WIC shows slips.  It appears that "clock source line"
doesn't do what it should, or somehow the first E-1 is clocking both circuits.  Physically disconnecting the first E-1 fixes the slips on the second.

Bug?  Misconfiguration?  Hardware limitation?

--
Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net Impulse Internet Service  -  http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV _______________________________________________
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