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Brekeke SIP Server Wiki

  1. Brekeke SIP Server Basic Info
  2. Security
  3. Update & Upgrade
  4. Configuration
  5. Troubleshooting
    1. How to access to the Embedded Database
    2. How to check dropped packets on Linux
    3. How to get debug logs 
    4. How to get jstack information
    5. Brekeke SIP Server License and Activation
    6. Starting up
    7. Registering problem
    8. Trouble with SIP UAs
    9. Trouble with Calling
      1. 401 Unauthorized, 407 Proxy Authentication Required
      2. 404 Not Found, 484 Address Incomplete, 603 Decline
      3. 415 Unsupported Media Type, 488 Not Acceptable Here
      4. 482 Loop Detected, 483 Too Many Hops
      5. 486 Busy Here
      6. 603 Packet-Too-Big
      7. Call drops after getting connected
      8. Call drops after getting connected and caller hears ring back tone
      9. Call drops; only one-side voice; no voice
      10. Callee not ring, caller hears ring tome
      11. Disconnected during a call
      12. Neither a busy tone nor a ring back tone
      13. UA1 calls UA2, UA2 does not ring
      14. One way call
      15. Other response codes
      16. Port Allocation failed
      17. Can not find a response code
      18. Poor sound quality
    10. Thread resources may not be released when it is integrated with Responder5
  6. Developer's Guide
  7. Version History

603 Packet-Too-Big

 

The default MTU size accepted by Brekeke SIP Server is 1500 byte.
When packets size is over the default MTU size, Brekeke SIP Server will reject call with 603 and the Result of the call in [Logs] will show “Packet Too Big”

SIP packet sent over UDP must follow this size limitation.
http://en.wikipedia.org/wiki/Maximum_transmission_unit

Solutions:

  • Reduce client SIP packet size
  • Use TCP instead of UDP
  • Tune the MTU size from Brekeke SIP Server side

    – From v3.3, with field [Check Maximum UDP packet size] setting, you can disable checking maximum UDP packet size from Brekeke SIP Server admintool > [Configuration] > [SIP] page.

    – For v3.1, change [Maximum UDP packet size] setting from Brekeke SIP Server Admintool
    save the setting and restart Brekeke SIP Server from Admintool

    – For earlier version, from Brekeke SIP Server Admintool > [Configuration]->[Advanced] page, set
    For example:
    net.sip.mtu.size = 2000
    save the setting and restart Brekeke SIP Server from Admintool

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