locked
ErrMgs=29 - SRTP Error - failed decrypting RTCP packet RRS feed

  • Question

  • Hi,
    We have setup Audiocodes mediant 1K ESBC SIP trunk with SFB FE POOL (collocated). there is SIP PSTN connected for external calls.
    Now we can see flood of these alerts being generated for all SFB EV inc & out calls "SRTP Error - failed decrypting RTCP packet"

    06:04:05.743  *SBC IP*     local0.warn    [S=32962412] [SID=a84682:23:336333]  ErrMgs=8 -- Invalid RTP SSRC number = 0X60EF058D, expected SSRC=0X1DA2F1E3 [Code:0x3700e] [CID:123] [Time:13-11@06:04:04.507]
    06:04:06.823  *SBC IP*     local0.warn    [S=32962416] [SID=a84682:23:336333]  ErrMgs=29 -- SRTP Error - failed decrypting RTCP packet (PacketLength=43, PayloadLength=0): wrong SSRC (11) [Code:0x3700e] [CID:259] [Time:13-11@06:04:05.592]
    06:04:07.625  *SBC IP*     local0.warn    [S=32962417] [SID=a84682:23:336333]  SRTCP_SSRC_ERROR:2  [Code:0x5004] [CID:259] [Time:13-11@06:04:06.402]                                                                                  
    06:04:10.101  *SBC IP*     local0.warn    [S=32962509] [SID=a84682:23:336333]  ErrMgs=29 -- SRTP Error - failed decrypting RTCP packet (PacketLength=139, PayloadLength=0): wrong SSRC (11) [Code:0x3700e] [CID:259] [Time:13-11@06:04:08.842]06:04:10.632  *SBC IP*     local0.warn    [S=32962510] [SID=a84682:23:336333]  SRTCP_SSRC_ERROR:1  [Code:0x5004] [CID:259] [Time:13-11@06:04:09.402]
    06:04:10.695  *SBC IP*     local0.warn    [S=32962511] [SID=a84682:23:336333]  ErrMgs=29 -- SRTP Error - failed decrypting RTCP packet (PacketLength=43, PayloadLength=0): wrong SSRC (11) [Code:0x3700e] [CID:259] [Time:13-11@06:04:09.462]                                                                                  
    06:04:21.319  *SBC IP*     local0.warn    [S=32962754] [SID=a84682:23:336333]  ErrMgs=29 -- SRTP Error - failed decrypting RTCP packet (PacketLength=183, PayloadLength=0): wrong SSRC (11) [Code:0x3700e] [CID:259] [Time:13-11@06:04:20.087]
    06:04:21.648  *SBC IP*     local0.warn    [S=32962755] [SID=a84682:23:336333]  SRTCP_SSRC_ERROR:1  [Code:0x5004] [CID:259] [Time:13-11@06:04:20.407]                                                                                  
    06:04:11.632  *SBC IP*     local0.warn    [S=32962629] [SID=a84682:23:336333]  SRTCP_SSRC_ERROR:4  [Code:0x5004] [CID:259] [Time:13-11@06:04:10.402]

    Also there are many CPU overload alarms (shown below) which gets cleared automatically.

    Alarm Name: System Component Overloaded
    Source: Board#1
    Source Description: 0
    Severity: major
    Alarm Type: processingErrorAlarm
    Alarm Probable Cause : congestion
    Description: Board overload alarm During the last 1 second SYSTEM CPU was overloaded.

    However we dont see any major issues with actual calls. Any help would be appreciated.

    Regards,
    Ajit
    Tuesday, November 13, 2018 6:54 AM

All replies

  • Hi,

    Please try to reconfigured and use TCP for the gateway.

    And also please try to reboot the mediation server and see if it could be fixed.

    By the way, please follow and recheck the steps on Audiocodes Users Manual provided by the supplier regarding integrating with SFB via AudioCodes E-SBC.

    Here is also a similar case could be as the reference.

    Kind regards,

    Calvin Liu


    Please remember to mark the reply as an answer if you find it is helpful. It will assist others who has similar issue. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    Click here to learn more. Visit the dedicated forum to share, explore and talk to experts about Microsoft Teams.

    • Proposed as answer by Calvin-Liu Monday, December 17, 2018 6:11 AM
    Wednesday, November 14, 2018 5:47 AM