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02-18-2020 09:00 AM
Hey everyone. We're experiencing some Skype performance issues, and I'm attempting to decode some QoS stats on the 3850 switch that connects the Skype server to the network. I'm seeing what looks like a ton of drops on the interface that connects the server, and I'm wondering if this is the root of the problem;
show policy-map interface gi 3/0/46
GigabitEthernet3/0/46
Service-policy input: PM-QOS-MARKING-V2
Class-map: CM-QOS-EF-LYNC-CLIENT-AUDIO (match-any)
63016338 packets
Match: access-group name ACL-QOS-LYNC-CLIENT-AUDIO
0 packets, 0 bytes
5 minute rate 0 bps
QoS Set
ip dscp ef
police:
cir 1000000 bps, bc 31250 bytes
conformed 20282017987 bytes; actions:
transmit
exceeded 1038009960 bytes; actions:
drop
conformed 21000 bps, exceeded 0000 bps
Could someone explain what the "bc 31250 bytes" switch is doing?
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02-18-2020 09:58 AM
The forgoing, in "English", means whether the number of bits, seen crossing the interface within the Tc is <= or > greater than the CiR that's allowed for the Tc. Those greater are dropped.
BTW, drops of sensitive traffic's packets often does adversely impact the application.
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02-18-2020 09:58 AM
The forgoing, in "English", means whether the number of bits, seen crossing the interface within the Tc is <= or > greater than the CiR that's allowed for the Tc. Those greater are dropped.
BTW, drops of sensitive traffic's packets often does adversely impact the application.
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02-18-2020 12:22 PM
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02-18-2020 03:58 PM
In either case, if it's expected production traffic, generally you shouldn't see a policer dropping some of it.
