Traps forwarded from other management systems to Smarts are being discarded.
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Traps forwarded from other management systems to Smarts are being discarded.

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Article ID: 303939

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Updated On:

Products

VMware Telco Cloud Service Assurance VMware Smart Assurance

Issue/Introduction

Symptoms:

  1. Traps forwarded from other management systems to Smarts are being discarded and associated notifications are not being shown in the Smarts SAM Notification Console.
  2. Traps forwarded to Smarts from other management systems are intermittently not being displayed in the Smarts SAM Notification Console.
  3. Traps forwarded to Smarts from other management systems are not being logged in the Smarts SAM log file

       
    With --traceSNMP flag set, the following is seen in the log file after the Trap Adapter:

...
   34:      error-index ->
            INTEGER-32 (0x02), 1 byte == 0
   37:      VarBindList ->
            INTEGER-32 (0x02), 2 bytes ==    39:      VarBind -> TIME-TICKS (0x43), 4 bytes ==    41:      SEQUENCE (0x30), 144 bytes:
".1.3.6.1.4.1.4748.1.1.1.3.0"
  188:        SEQUENCE (0x30), 16 bytes:
<Null>
   68:      Remainder of the bad packet follows.
{      30, 14, 06, 0c, 2b, 06, 01, 04, 01, a5, 0c, 01, 03, 01, 01, 00,
       02, 04, 01, d1, 7d, 13, 30, 41, 06, 0c, 2b, 06, 01, 04, 01, a5,
       0c, 01, 03, 01, 02, 00, 04, 31, 34, 34, 38, 35, 33, 20, 31, 30,
       2f, 30, 32, 2f, 31, 32, 20, 31, 39, 3a, 30, 35, 3a, 30, 39, 20,
       34, 30, 39, 37, 20, 41, 20, 54, 53, 43, 20, 4e, 4f, 54, 20, 52,
       45, 53, 50, 4f, 4e, 44, 49, 4e, 47, 30, 0f, 06, 0a, 2b, 06, 01,
       04, 01, a5, 0c, 01, 1c, 00, 02, 01, 01, 30, 12, 06, 0a, 2b, 06,
       01, 04, 01, a5, 0c, 01, 1d, 00, 02, 04, 01, d1, 7d, 11     }
[12-Feb-2010 19:05:13+793ms UTC]
t@1092634976 SNMP_TrapsHandler [212.23.36.146:162] Processor SNM2-E-SNMP_AGENTERRORSTATS-Below message for SNMP agent at
    '10.44.1.190:40852', was suppressed 0 times since The Epoch  SNMP-EPARSER-Mangled or incorrect packet; parsing aborted and data discarded;
    in file
    



Environment

SMARTS - 10.1.x

SMARTS DM - 2.x

TCSA - 2.x

Cause

The wrong information being returned by the device. The "SNMP-EPARSER-Mangled or incorrect packet" message in the above problem symptom ("With --traceSNMP flag set...") indicates that this issue is caused by a parser error resulting from a bad packet. Therefore, Smarts cannot parse the packet further because it is corrupted or does not follow the RFC standards.

Resolution

  • This issue must be resolved with the vendor of the problem device.

Additional Information

  1. There are no system consequences associated these "bad" traps being dropped.
  2. Even if some traps with respect to the device are dropped (such as Card Down and Card Up).
  3. Smarts will poll for the status in next polling cycle and the status will get updated accordingly.
  4. Also, when one of these erroneous traps is discarded, Smarts does NOT drop other traps.