Hi!
I have two issues here with QoS on a 3850.
1. I have a policy configured on the uplink to another switch outgoing. i have a client connected to that switch sending DSCP 46 marked packets.
When looking a the stats, i see excessive drops on the policy-map. Are those drops from default traffic? or are they from the DSCP 46 stream? iperf says i have almost no loss. I'm sendin g UDP traffic between two laptops.
Policy-Map:
Policy Map UPLINK_OUTGOING
Class VOICE
priority level 1 10 (%)
police cir percent 10
conform-action transmit
exceed-action drop
Class VIDEO
priority level 2 20 (%)
police cir percent 20
conform-action transmit
exceed-action drop
Class class-default
bandwidth remaining 100 (%)
Interface config:
interface TenGigabitEthernet1/1/1
description sw-lab-c6800-1 t1/1
switchport trunk native vlan 2
switchport trunk allowed vlan 10
switchport mode trunk
channel-group 10 mode active
service-policy output USER_OUTGOING
end
!
interface TenGigabitEthernet1/1/2
description sw-lab-c6800-1 t1/2
switchport trunk native vlan 2
switchport trunk allowed vlan 10
switchport mode trunk
channel-group 10 mode active
service-policy output USER_OUTGOING
end
!
interface Port-channel10
description sw-lab-c6800-1
switchport trunk native vlan 2
switchport trunk allowed vlan 10
switchport mode trunk
end
Statistics after sendign a 10MBit/s Stream:
TenGigabitEthernet1/1/1
Service-policy output: USER_OUTGOING
queue stats for all priority classes:
Queueing
priority level 1
(total drops) 7748
(bytes output) 12753854
queue stats for all priority classes:
Queueing
priority level 2
(total drops) 0
(bytes output) 0
Class-map: VOICE (match-any)
9087 packets
Match: ip dscp ef (46)
0 packets, 0 bytes
5 minute rate 0 bps
Priority: 1% (100000 kbps), burst bytes 2500000,
Priority Level: 1
police:
cir 1 %
cir 100000000 bps, bc 3125000 bytes
conformed 12781448 bytes; actions:
transmit
exceeded 0 bytes; actions:
drop
conformed 40000 bps, exceeded 0000 bps
Class-map: VIDEO (match-any)
0 packets
Match: ip dscp af41 (34)
0 packets, 0 bytes
5 minute rate 0 bps
Priority: 5% (500000 kbps), burst bytes 12500000,
Priority Level: 2
police:
cir 5 %
cir 500000000 bps, bc 15625000 bytes
conformed 0 bytes; actions:
transmit
exceeded 0 bytes; actions:
drop
conformed 0000 bps, exceeded 0000 bps
Class-map: class-default (match-any)
4465 packets
Match: any
Queueing
(total drops) 0
(bytes output) 357826
bandwidth remaining 100%
2. The Links are both 10GBit/s, iconfigured the VOICE class to be 1% of the bandwidth, so i should have a max throughput of 100MBit/s in that class, right?
But i can only get a maximum of 10MBits when this policy is applied! When sending a 100MBit-Stream, i have 85% packet loss.
Please help,
Christian
