12-17-2013 03:24 AM - edited 03-04-2019 09:53 PM
Hi,
I'm seeing input queue drops increasing in cisco WS-C6509. What could be the reason,Is it bcoz of any qos issue?
#sh int g1/5 | in drop
Input queue: 0/2000/1285737/0 (size/max/drops/flushes); Total output drops: 0
interface GigabitEthernet1/5
no ip address
wrr-queue bandwidth 1 5 50
wrr-queue queue-limit 50 30 20
wrr-queue random-detect min-threshold 1 80 100 100 100 100 100 100 100
wrr-queue random-detect min-threshold 2 50 70 90 100 100 100 100 100
wrr-queue random-detect min-threshold 3 50 70 100 100 100 100 100 100
wrr-queue random-detect max-threshold 1 100 100 100 100 100 100 100 100
wrr-queue random-detect max-threshold 2 60 80 100 100 100 100 100 100
wrr-queue random-detect max-threshold 3 60 80 100 100 100 100 100 100
wrr-queue cos-map 2 1 1
wrr-queue cos-map 2 2 2
wrr-queue cos-map 2 3 4
wrr-queue cos-map 3 1 3
wrr-queue cos-map 3 2 6
wrr-queue cos-map 3 3 7
rcv-queue threshold 1 50 60 65 75 80 85 90 100
rcv-queue cos-map 1 2 1
rcv-queue cos-map 1 3 2
rcv-queue cos-map 1 4 4
rcv-queue cos-map 1 5 3
rcv-queue cos-map 1 6 6
rcv-queue cos-map 1 7 7
rcv-queue cos-map 1 8 5
mls qos trust dscp
switchport
switchport access vlan 100
switchport mode access
end
12-17-2013 03:41 AM
Post the following outputs:
1. sh counter interface G1/5;
2. sh interface G1/5;
3. sh version; and
4. sh module
12-17-2013 03:56 AM
12-17-2013 04:09 AM
Here's my take ...
If you have QoS issues, you'd see a lot of output drops. But in your particular case, you have none. Now I'm not sure that this is caused by an IOS bug or not.
The output to the "sh interface", however, has shown that the interface has some "Input Errors". The "sh counters" is suppose to verify which line errors you are getting. But this is where everything starts going "wierd".
If you look into your "sh counters" output, look at the second segment, the 32-bit counters. Those values are suppose to be 0. But in your output the 32-bit counters have values. THE SAME VALUES.
Look further down under "All Port Counters". Again, same values where line errors are occuring.
Line errors such as FCS, Alignment, etc. are all zero. No collissions.
I'm beginning to believe whatever is downstream is causing some issues. What is the downstream client to this port?
12-17-2013 04:23 AM
Device connected to this port is WS-C6506. But when I give "sh inter switching" its showing drops in RP. Is this causing the issue?
#sh cdp neighbors g1/5
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone
Device ID Local Intrfce Holdtme Capability Platform Port ID
xxxxxx Gig 1/5 166 T S I WS-C6506 2/4
Switch2# sh int g1/5 switching
GigabitEthernet1/5 Energis-t244-r94-002-Port2/4
Throttle count 0
Drops RP 1285842 SP 0
SPD Flushes Fast 0 SSE 0
SPD Aggress Fast 0
SPD Priority Inputs 0 Drops 0
Protocol Path Pkts In Chars In Pkts Out Chars Out
Other Process 4171444 233600864 0 0
Cache misses 0
Fast 0 0 0 0
Auton/SSE 0 0 0 0
Spanning Tree Process 27393 1178110 62227220 2674481344
Cache misses 0
Fast 0 0 0 0
Auton/SSE 0 0 0 0
CDP Process 2087856 538666848 2088683 1008833871
Cache misses 0
Fast 0 0 0 0
Auton/SSE 0 0 0 0
12-17-2013 08:58 AM
Hello ,
Yes this is most likely what is causing your issue , first of all you need to know why these packets are coming to the input queue , the traffic that is punted to the cpu will be queued in the input queue and we understand why.
Kindly try to capture the output of "show buffer input-interface gig 5/1 packet" multiple times , this should give uz an idea about the nature of the traffic comint to this interface and punted to the cpu.
HTH.
Ahmad.
Sent from Cisco Technical Support Android App
12-17-2013 10:25 AM
Hi,
I'm not getting anything in buffer.
Switch2#show buffer input-interface gig 5/1 packe
Switch2#
12-17-2013 11:58 AM
Hello Ajay,
You need to issue the command multiple times , the command will give you an output only when there is a packet in the input queue.
HTH.
Ahmad.
Sent from Cisco Technical Support Android App
12-18-2013 05:09 AM
Hi,
I tried lot of times, I cant see anything in buffer.
I can see drop count same as input errors and nothing in queue size.
Input queue: 0/2000/2537/0 (size/max/drops/flushes); Total output drops: 0
2537 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
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