Hi Guys,
Hope I can seek a little help here.
I've MLP QOS configured on my lab and I notice that the ef packet count for outbound and inbound on the router WAN interface are almost identical.
For example I've two office, HQ and Branch, both office have phones registered to CUCM located at HQ and there is a 384 WAN link between.
both voice gateway are running MGCP. When the call is established, I notice the following output:
HQ Router
Service-policy input: EF-Inbound
Class-map: AutoQoS-VoIP-RTP-Trust (match-any)
332 packets, 21248 bytes
5 minute offered rate 6000 bps
Match: ip dscp ef (46)
332 packets, 21248 bytes
5 minute rate 6000 bps
Class-map: class-default (match-any)
11 packets, 674 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: any
Service-policy output: AutoQoS-Policy-Trust
queue stats for all priority classes:
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops) 0/0/0
(pkts output/bytes output) 335/20770
Class-map: AutoQoS-VoIP-RTP-Trust (match-any)
335 packets, 20770 bytes
5 minute offered rate 8000 bps, drop rate 0 bps
Match: ip dscp ef (46)
335 packets, 20770 bytes
5 minute rate 8000 bps
Priority: 33% (126 kbps), burst bytes 3150, b/w exceed drops: 0
Branch Router
Virtual-Access3
Service-policy input: EF-Inbound
Class-map: AutoQoS-VoIP-RTP-UnTrust (match-any)
190 packets, 12160 bytes
5 minute offered rate 10000 bps
Match: protocol rtp audio
190 packets, 12160 bytes
5 minute rate 10000 bps
Match: access-group name AutoQoS-VoIP-RTCP
0 packets, 0 bytes
5 minute rate 0 bps
Class-map: class-default (match-any)
12 packets, 1712 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: any
Service-policy output: AutoQoS-Policy-UnTrust
queue stats for all priority classes:
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops) 0/0/0
(pkts output/bytes output) 188/11656
Class-map: AutoQoS-VoIP-RTP-UnTrust (match-any)
187 packets, 11594 bytes
5 minute offered rate 10000 bps, drop rate 0 bps
Match: protocol rtp audio
187 packets, 11594 bytes
5 minute rate 10000 bps
Match: access-group name AutoQoS-VoIP-RTCP
0 packets, 0 bytes
5 minute rate 0 bps
QoS Set
dscp ef
Packets marked 188
Priority: 33% (126 kbps), burst bytes 3150, b/w exceed drops: 0
As my understanding, aren't the inbound ef packet count should be same or at least close to the number of the sender's outbound?
for this example HQ is sending 335 packet and isn't Branch should be receiving 335 ef packet? (assuming no packet lost)
Also i notice on the same router, the inbound / outbound ef packet count is almost identical, is that correct pattern for voice traffic?
When checking the statistics on the phone and is showing the same.
if I've have huge number mismatch on this will that means the call suffer quality issue?
Appreciate if someone can enlighten me on this.
Thanks
Regards,
Alex
