RAI Detected (PRI error message)

[ramiz.shaikh1]

We are getting below error message and PRI continuously flapping 

//

May 31 15:15:24.063 IST: %MARS_NETCLK-3-HOLDOVER: Entering Holdover for Controller E1 0/0/0
May 31 15:15:24.831 IST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to up
May 31 15:15:27.315 IST: %MARS_NETCLK-3-HOLDOVER: Exiting Holdover for Controller E1 0/0/0
May 31 15:15:29.831 IST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to down (RAI detected)
May 31 15:15:29.835 IST: ISDN Se0/0/0:15 Q931: L3_ShutDown: Shutting down ISDN Layer 3
May 31 15:15:29.835 IST: ISDN Se0/0/0:15 Q931: Ux_DLRelInd: DL_REL_IND received from L2
May 31 15:15:30.063 IST: %MARS_NETCLK-3-HOLDOVER: Entering Holdover for Controller E1 0/0/0
May 31 15:15:30.831 IST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to up
May 31 15:15:33.315 IST: %MARS_NETCLK-3-HOLDOVER: Exiting Holdover for Controller E1 0/0/0
May 31 15:15:45.831 IST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to down (May 31 15:15:24.063 IST: %MARS_NETCLK-3-HOLDOVER: Entering Holdover for Controller E1 0/0/0
May 31 15:15:24.831 IST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to up
May 31 15:15:27.315 IST: %MARS_NETCLK-3-HOLDOVER: Exiting Holdover for Controller E1 0/0/0
May 31 15:15:29.831 IST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to down (RAI detected)
May 31 15:15:29.835 IST: ISDN Se0/0/0:15 Q931: L3_ShutDown: Shutting down ISDN Layer 3
May 31 15:15:29.835 IST: ISDN Se0/0/0:15 Q931: Ux_DLRelInd: DL_REL_IND received from L2
May 31 15:15:30.063 IST: %MARS_NETCLK-3-HOLDOVER: Entering Holdover for Controller E1 0/0/0
May 31 15:15:30.831 IST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to up
May 31 15:15:33.315 IST: %MARS_NETCLK-3-HOLDOVER: Exiting Holdover for Controller E1 0/0/0
May 31 15:15:45.831 IST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to down (RAI detected)

//

Below is the configuration on GW.

//

card type e1 0 0

clock timezone IST 5 30
network-clock-participate wic 0
network-clock-select 1 E1 0/0/0

!

isdn switch-type primary-net5

!

!
!
controller E1 0/0/0
framing NO-CRC4
pri-group timeslots 1-31

//

I have raised it with telco and asked them to test with PRI meter, however Please let me know if configuration is fine from my end so that I can follow up better with them.

[Rajan]

Hi Ramiz,

As mentioned in the below discussion, try changing CRC to see if that helps. 

https://supportforums.cisco.com/discussion/10218546/pri-error-message-rai-detected

If the issue persists, then it should be on the telco side.

HTH

Rajan

Pls rate all useful posts

[Aman Soi]

Hi Ramiz,

RAI stands for Remote Alarm Indication.

If this was the working link, then, it is better to give physical loop from your/customer side [by joining TX and RX pairs ;1,2 with 4,5] and ask TELCO to check with BERT Meter.

regds,

aman

[Jitender Bhandari]

Hi Ramiz,

mostly happens because of isdn switch type mismatching between the Voice gateway and PSTN switch. See below detail

https://supportforums.cisco.com/discussion/10218546/pri-error-message-rai-detected

http://www.networking-forum.com/viewtopic.php?t=13790

(Rate if it helps)

JB