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Hall of Fame Super Silver

PRI and BRI on same GW causing clock issues

I have a GW with 2 E1-PRIs on dedicated NM module and BRI cards in HWIC slots. Whenever call is received on BRI and ISDN L3 comes up clocking is transitiong from E1-PRI to BRI even though the E1 has higher priority. As soon as the BRI L3 goes down after call completion the clocking transitions to backplane resulting in slips/etc:

Jun  6 21:23:22.194: ISDN BR0/0/1 Q931: Ux_DLRelInd: DL_REL_IND received from L2

Jun  6 21:23:23.194: ISDN BR0/0/0 Q931: Ux_DLRelInd: DL_REL_IND received from L2

Jun  6 21:23:53.762: ISDN BR0/0/0 Q931: L3_ShutDown: Shutting down ISDN Layer 3

Jun  6 21:23:53.762: ISDN BR0/0/1 Q931: L3_ShutDown: Shutting down ISDN Layer 3

Jun  6 21:23:53.814: %LINK-3-UPDOWN: Interface BRI0/0/0, changed state to down

Jun  6 21:23:53.814: %LINK-3-UPDOWN: Interface BRI0/0/1, changed state to down

Jun  6 21:23:53.914: %MARS_NETCLK-3-HOLDOVER: Entering Holdover for Controller BRI0/0/0

Jun  6 21:24:04.162: %MARS_NETCLK-3-HOLDOVER_TRANS: Holdover timer exceeded for Controller BRI0/0/0

Jun  6 21:24:04.162: %MARS_NETCLK-3-CLK_TRANS: Network clock source transitioned from priority 3 to priority 10

Jun  6 21:23:22.654: %MARS_NETCLK-3-HOLDOVER_TRANS: Holdover timer exceeded for Controller E1 1/0

Jun  6 21:23:22.654: %MARS_NETCLK-3-CLK_TRANS: Network clock source transitioned from priority 1 to priority 3

  Network Clock Configuration

  ---------------------------

  Priority      Clock Source    Clock State     Clock Type

     1          E1 1/0          LINK DOWN       E1         

     2          E1 1/1          LINK DOWN       E1         

     3          BRI0/0/0        GOOD            BRI        

     4          BRI0/0/1        GOOD            BRI        

     5          BRI0/1/0        LINK DOWN       BRI        

     6          BRI0/1/1        LINK DOWN       BRI        

    10          Backplane       GOOD            PLL        

  Current Primary Clock Source

  ---------------------------

  Priority      Clock Source    Clock State     Clock Type

     3          BRI0/0/0        GOOD            BRI        

My network-select config:

network-clock-participate slot 1

network-clock-participate wic 0

network-clock-participate wic 1

network-clock-select 1 E1 1/0

network-clock-select 2 E1 1/1

network-clock-select 3 BRI0/0/0

network-clock-select 4 BRI0/0/1

network-clock-select 5 BRI0/1/0

network-clock-select 6 BRI0/1/1

Does anyone know why this is happening?

Chris

Everyone's tags (6)
2 REPLIES
Hall of Fame Super Gold

Re: PRI and BRI on same GW causing clock issues

From the output above, the E1 circuits appears to be down, consequently they cannot be clock source.

Hall of Fame Super Silver

PRI and BRI on same GW causing clock issues

Paolo,

Thanks for taking a look.  The E1 was down after the call arrived on the BRI port, in order to get it back I need to shut/no shut the controller. Here is how it looked before the call arrived on BRI:

  Network Clock Configuration

  ---------------------------

  Priority      Clock Source    Clock State     Clock Type

     1          E1 1/0          GOOD            E1         

     2          E1 1/1          GOOD            E1         

     3          BRI0/0/0        LINK DOWN       BRI        

     4          BRI0/0/1        LINK DOWN       BRI        

     5          BRI0/1/0        LINK DOWN       BRI        

     6          BRI0/1/1        LINK DOWN       BRI        

    10          Backplane       GOOD            PLL        

Chris

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