[cisco-voip] 5250 SPE errors

[Gordon Smith]

Hi all,

We're seeing errors being reported on a 5350 that's being used for voice
only:

BW-VGW-1#show spe voice summary 

Cisco Universal SPE (Managed); Port 1/0 - 2/59
Last clearing of statistics counters          :  4d00h

      2527 Incoming calls                  14567 Outgoing calls

   Voice:
         0 Payload Type Violation          55459 Buffer Overflow Errors
    119125 End-point Detection Errors     233099 Packets Received Early
   1550786 Packets Received Late               0 Bad Protocol Headers
   Fax-relay:
         0 Payload Type Violation              0 Buffer Overflow Errors
         1 Buffer Underflow Errors             0 End-point Detection
Errors
         0 Bad Protocol Headers

Codec         Calls   Codec     Calls   Codec           Calls   Codec
Calls
G.711 u-Law      25   G.729         0   G.723.1 6.3K        0   GSM FR
0
G.711 a-Law     159   G.729B        0   G.723.1 5.3K        0   GSM HR
0
G.726 40K         0   G.729A    16910   G.723.1A 6.3K       0   GSM EFR
0
G.726 32K         0   G.729AB       0   G.723.1A 5.3K       0
G.726 24K         0   G.728         0   Clear Channel       0
G.726 16K         0


This device is behind a SIP proxy - endpoints go via a 7301 then the
proxy.
The number of errors seem to be rather high. Does this look like an SPE
problem? Checked Cisco's site for an explanation on how these errors are
detected and reported, but was unable to find anything. Across the
network core I have less than 1ms total delay, so I'm thinking that this
is either an issue with the 5350 or that the proxy is introducing
problems.

Has anyone seen this before? Any ideas on how the SPE does its
detection? There are no errors at all on the ethernet side. The 5350
isn't working very hard and it isn't running any routing protocols...

Cheers,
Gordon