Avaya G430 - Page 376

The RTP statistics application is configured as described in Four telephones in a sample
network on page 373. The callers complain after the call that there were QoS problems during
the call. The administrator investigates as follows:
//to see if the RTP statistics application registered QoS problems for the call:
Gxxx-001 (super)# show rtp sessions
ID QoS Start date and time End Time Type Destination
----- --- ------------------- -------- ---------- ---------------
00001 *
1
2004-12-07,00:39:26 00:41:01 G711U 20.20.20.2
//to display more details on the session:
Gxxx-001 (super)# show rtp-stat detailed 1
Session-ID: 1
Status: Terminated, QOS: Faulted
2
, EngineId: 0
Start-Time: 2004-12-07,00:39:26, End-Time: 2004-12-07,00:41:01
Duration: 00:01:35
CName: gwp@30.30.30.1
Phone: 199:2111
Local-Address: 30.30.30.1:2329 SSRC 2764463979
Remote-Address: 20.20.20.2:2329 SSRC 1260226 (0)
Samples: 19 (5 sec)
Codec:
G711U 200B 20mS Off, Silence-suppression(Tx/Rx) Disabled/Disabled, Play-Time 63.
916sec, Loss 11.0% #15
3
, Avg-Loss 8.6%, RTT 201mS #0, Avg-RTT 210mS, JBuf-under/o
verruns 9.4%/0.0%, Jbuf-Delay 2mS, Max-Jbuf-Delay 35mS
Received-RTP:
Packets 3225, Loss 0.0% #9
4
, Avg-Loss 8.4%, RTT 124mS #0, Avg-RTT 96mS, Jitter 11
mS #0, Avg-Jitter 9mS, TTL(last/min/max) 63/63/63, Duplicates 0, Seq-Fall 0, DSC
P 46, L2Pri 12, RTCP 9
Transmitted-RTP:
VLAN 1, DSCP 46, L2Pri 6, RTCP 17
Remote-Statistics:
Loss 11.6% #14
5
, Avg-Loss 8.9%, Jitter 33mS #0, Avg-Jitter 26mS
Echo-Cancellation:
Loss 49dB #0, Len 32mS
RSVP:
Status Disabled, Failures 0
A few points to note:
• The asterisk in the show rtp sessions output indicates that session 1 has QoS faults
[1]
• The QoS is described as Faulted because there were QoS faults [2]
• QoS faults that can be seen in the output are:
- The codec loss event counter indicates that codec loss went over its threshold 15
times [3]
- The received-RTP packet loss event counter indicates that packet loss went over its
threshold nine times [4]
- The remote packet loss event counter indicates that remote packet loss went over
its threshold 14 times [5]
Monitoring applications
376 Administering Avaya G430 Branch Gateway October 2013
Comments? infodev@avaya.com