06-06-2012 02:35 PM - edited 03-16-2019 11:32 AM
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
06-06-2012 04:20 PM
From the output above, the E1 circuits appears to be down, consequently they cannot be clock source.
06-06-2012 04:22 PM
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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