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New Member

Dual VWIC-1MFT-E1 on 2811

Here is my issue.

I have two VWIC cards on a 2811 going to 2 providers.

One E1 is going down with errors. Line code violations blablabla, and sometime just by chaging the time on the CCM.

Do I need to configure clock source internal on both controller or source line on one of them ?

many thanks.

  • WAN Routing and Switching
Hall of Fame Super Gold

Re: Dual VWIC-1MFT-E1 on 2811

Clock source must be line on both.

You also need network-clock-participate and network-clock-select.

New Member

Re: Dual VWIC-1MFT-E1 on 2811

well ,when I have source line on both, marticipate on both and select either the first one or the second one, then I still have the E1 going down with line code violations.

the only "stable" config is internal on both, participate on both, no select.

But in this config, I have slip erros. no big deal but I don't really understand why it does not work with source line.

Hall of Fame Super Gold

Re: Dual VWIC-1MFT-E1 on 2811

Sometime strange things happen when multiple clocks are in a router.

If you can prove that one circuit at time is 100% stable and clean with line clock, -participate and -select, but two are not, then it would be matter for the TAC to look at.

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