05-22-2012 07:54 AM - edited 03-07-2019 06:50 AM
I have a QoS service policy applied to a 10gig interface on a Nexus 7000. 'Show int' of the interface shows 1067 output discards, but a 'show policy-map' of the interace shows no drops in any of the classes. This seems to imply that output discards are occurring, and yet there is not congestion at the time to force output queues to drop packets as required by the QoS policy map. The outputs of both show commands are below. What could cause output discards in this case?
ROC-NX7010B-CORE-B# sh int e2/7
Ethernet2/7 is up
Dedicated Interface
Hardware: 10000 Ethernet, address: 64a0.e740.5542 (bia 70ca.9b40.90c2)
Description: DU-D
Internet Address is 164.72.187.110/30
MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA
full-duplex, 10 Gb/s, media type is 10G
Beacon is turned off
Auto-Negotiation is turned off
Input flow-control is off, output flow-control is off
Rate mode is dedicated
Switchport monitor is off
EtherType is 0x8100
Last link flapped 3d07h
Last clearing of "show interface" counters 21:49:50
30 seconds input rate 3095840 bits/sec, 825 packets/sec
30 seconds output rate 9884928 bits/sec, 1888 packets/sec
Load-Interval #2: 5 minute (300 seconds)
input rate 3.59 Mbps, 968 pps; output rate 11.23 Mbps, 1.81 Kpps
L3 in Switched:
ucast: 0 pkts, 0 bytes - mcast: 0 pkts, 0 bytes
L3 out Switched:
ucast: 116744989 pkts, 63298925848 bytes - mcast: 0 pkts, 0 bytes
RX
100607249 unicast packets 33626 multicast packets 0 broadcast packets
100640877 input packets 31998358300 bytes
0 jumbo packets 0 storm suppression packets
0 runts 0 giants 0 CRC 0 no buffer
0 input error 0 short frame 0 overrun 0 underrun 0 ignored
0 watchdog 0 bad etype drop 0 bad proto drop 0 if down drop
0 input with dribble 0 input discard
0 Rx pause
TX
117941510 unicast packets 28945 multicast packets 0 broadcast packets
117970455 output packets 63555760528 bytes
0 jumbo packets
0 output error 0 collision 0 deferred 0 late collision
0 lost carrier 0 no carrier 0 babble 1067 output discard
0 Tx pause
0 interface resets
--------------------------------------------------------------------------------------------------------------------
ROC-NX7010B-CORE-B# sh policy-map int e2/7
Global statistics status : enabled
Ethernet2/7
Service-policy (queuing) input: default-in-policy
SNMP Policy Index: 301990105
Class-map (queuing): in-q1 (match-any)
queue-limit percent 50
bandwidth percent 80
queue dropped pkts : 0
Class-map (queuing): in-q-default (match-any)
queue-limit percent 50
bandwidth percent 20
queue dropped pkts : 0
Service-policy (queuing) output: 10gig-OUT
SNMP Policy Index: 301990657
Class-map (queuing): 1p7q4t-out-pq1 (match-any)
priority level 1
queue-limit percent 15
queue dropped pkts : 0
Class-map (queuing): 1p7q4t-out-q2 (match-any)
queue-limit percent 25
random-detect cos-based
random-detect cos 7 minimum-threshold percent 95 maximum-threshold percent 100
random-detect cos 6 minimum-threshold percent 90 maximum-threshold percent 95
random-detect cos 3 minimum-threshold percent 85 maximum-threshold percent 90
bandwidth remaining percent 22
queue dropped pkts : 0
Class-map (queuing): 1p7q4t-out-q3 (match-any)
queue-limit percent 25
random-detect cos-based
random-detect cos 2 minimum-threshold percent 90 maximum-threshold percent 100
bandwidth remaining percent 5
queue dropped pkts : 0
Class-map (queuing): 1p7q4t-out-q-default (match-any)
queue-limit percent 35
random-detect cos-based
random-detect cos 1 minimum-threshold percent 80 maximum-threshold percent 90
random-detect cos 0 minimum-threshold percent 90 maximum-threshold percent 100
bandwidth remaining percent 73
queue dropped pkts : 0
09-14-2022 08:14 AM
Please can yo help me, I have two QoS service policy applied to a 10gig interface on a Nexus 7000. 'show policy-map' of the interace shows 500858 output discards,
if you know any commands to see the specific ip match Qos policy. we need to see if some Ip´s to drop packets by the Qos policy map ?
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