3560 mls qos - output queues counters?
Hi!
I have WS-C3560G-24TS 15.0(2)SE4.
In gi0/10 we received IPTV multicast traffic only.
interface GigabitEthernet0/10
description IPTV
switchport access vlan 929
switchport mode access
switchport nonegotiate
mls qos trust dscp
channel-protocol lacp
channel-group 3 mode active
service-policy input iptv-cos
end
on port input - 350mbit - output 2000 Bit/s!
Queueing strategy: fifo
5 minute input rate 348797000 bits/sec, 32008 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
Then i send command:
clear counters
clear mlq qos int stat
and
sh mls qos int gi0/10 st
after 5-10 seconds i see:
GigabitEthernet0/10 (All statistics are in packets)
dscp: incoming
0 - 4 : 156657 0 0 0 0
5 - 9 : 0 0 0 0 0
10 - 14 : 0 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 0
25 - 29 : 0 0 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 0 0 0 0 0
45 - 49 : 0 0 0 0 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 0 0 0 0
60 - 64 : 0 0 0 0
dscp: outgoing
0 - 4 : 4 0 0 0 0
5 - 9 : 0 0 0 0 0
10 - 14 : 0 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 0
25 - 29 : 0 0 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 0 0 0 0 0
45 - 49 : 0 0 0 0 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 0 0 0 0
60 - 64 : 0 0 0 0
cos: incoming
0 - 4 : 156661 0 0 0 0
5 - 7 : 0 0 0
cos: outgoing
0 - 4 : 4 0 0 0 0
5 - 7 : 0 0 0
output queues enqueued:
queue: threshold1 threshold2 threshold3
queue 0: 0 0 0
queue 1: 4 0 0
queue 2: 0 0 0
queue 3: 0 0 112066
output queues dropped:
queue: threshold1 threshold2 threshold3
queue 0: 0 0 0
queue 1: 0 0 0
queue 2: 0 0 0
queue 3: 0 0 0
Policer: Inprofile: 0 OutofProfile: 0
Question!
Why i have 112066 packets in output queue 3, then bitrate output - 5 minute output rate 0 bits/sec, 0 packets/sec and 7 packets output, 576 bytes after clear.
I have any time this bitrate.
a few hours later I see:
bm18.lan#sh mls q int gi0/10 st
GigabitEthernet0/10 (All statistics are in packets)
dscp: incoming
0 - 4 : 849303034 0 0 0 0
5 - 9 : 0 0 0 0 0
10 - 14 : 0 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 0
25 - 29 : 0 0 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 0 0 0 0 0
45 - 49 : 0 0 0 3517 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 0 0 0 0
60 - 64 : 0 0 0 0
dscp: outgoing
0 - 4 : 45265 0 0 0 0
5 - 9 : 0 0 0 0 0
10 - 14 : 0 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 0
25 - 29 : 0 0 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 0 0 0 0 0
45 - 49 : 0 0 0 0 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 0 0 0 0
60 - 64 : 0 0 0 0
cos: incoming
0 - 4 : 849324148 0 0 0 0
5 - 7 : 0 0 0
cos: outgoing
0 - 4 : 45265 0 0 0 0
5 - 7 : 0 0 0
output queues enqueued:
queue: threshold1 threshold2 threshold3
queue 0: 0 0 0
queue 1: 45265 0 4071
queue 2: 0 0 0
queue 3: 0 0 605666519
output queues dropped:
queue: threshold1 threshold2 threshold3
queue 0: 0 0 0
queue 1: 0 0 0
queue 2: 0 0 0
queue 3: 0 0 0
Policer: Inprofile: 0 OutofProfile: 0
send:
bm18.lan#sh mls q int gi0/10 st
GigabitEthernet0/10 (All statistics are in packets)
dscp: incoming
0 - 4 : 849303034 0 0 0 0
5 - 9 : 0 0 0 0 0
10 - 14 : 0 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 0
25 - 29 : 0 0 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 0 0 0 0 0
45 - 49 : 0 0 0 3517 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 0 0 0 0
60 - 64 : 0 0 0 0
dscp: outgoing
0 - 4 : 45265 0 0 0 0
5 - 9 : 0 0 0 0 0
10 - 14 : 0 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 0
25 - 29 : 0 0 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 0 0 0 0 0
45 - 49 : 0 0 0 0 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 0 0 0 0
60 - 64 : 0 0 0 0
cos: incoming
0 - 4 : 849324148 0 0 0 0
5 - 7 : 0 0 0
cos: outgoing
0 - 4 : 45265 0 0 0 0
5 - 7 : 0 0 0
output queues enqueued:
queue: threshold1 threshold2 threshold3
queue 0: 0 0 0
queue 1: 45265 0 4071
queue 2: 0 0 0
queue 3: 0 0 605666519
output queues dropped:
queue: threshold1 threshold2 threshold3
queue 0: 0 0 0
queue 1: 0 0 0
queue 2: 0 0 0
queue 3: 0 0 0
Policer: Inprofile: 0 OutofProfile: 0
bm18.lan#
bm18.lan#
bm18.lan#
bm18.lan#
bm18.lan#
bm18.lan#
bm18.lan#
bm18.lan#
bm18.lan#
bm18.lan#
bm18.lan#
bm18.lan#
bm18.lan#
bm18.lan#
bm18.lan#clear mls qos int st
bm18.lan#
bm18.lan#
bm18.lan#clear counters
Clear "show interface" counters on all interfaces [confirm]
bm18.lan#
bm18.lan#
bm18.lan#
bm18.lan#sh mls qos int gi0/10 st
GigabitEthernet0/10 (All statistics are in packets)
dscp: incoming
0 - 4 : 1141981 0 0 0 0
5 - 9 : 0 0 0 0 0
10 - 14 : 0 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 0
25 - 29 : 0 0 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 0 0 0 0 0
45 - 49 : 0 0 0 3 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 0 0 0 0
60 - 64 : 0 0 0 0
dscp: outgoing
0 - 4 : 92 0 0 0 0
5 - 9 : 0 0 0 0 0
10 - 14 : 0 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 0
25 - 29 : 0 0 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 0 0 0 0 0
45 - 49 : 0 0 0 0 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 0 0 0 0
60 - 64 : 0 0 0 0
cos: incoming
0 - 4 : 1142010 0 0 0 0
5 - 7 : 0 0 0
cos: outgoing
0 - 4 : 92 0 0 0 0
5 - 7 : 0 0 0
output queues enqueued:
queue: threshold1 threshold2 threshold3
queue 0: 0 0 0
queue 1: 92 0 5
queue 2: 0 0 0
queue 3: 0 0 810894
output queues dropped:
queue: threshold1 threshold2 threshold3
queue 0: 0 0 0
queue 1: 0 0 0
queue 2: 0 0 0
queue 3: 0 0 0
Policer: Inprofile: 0 OutofProfile: 0
bm18.lan#
bm18.lan#
bm18.lan#sh int gi0/10
GigabitEthernet0/10 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0019.e7b1.c68a (bia 0019.e7b1.c68a)
Description: IPTV
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 89/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:07, output 00:00:06, output hang never
Last clearing of "show interface" counters 00:00:37
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 351051000 bits/sec, 32219 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1202212 packets input, 1637377057 bytes, 0 no buffer
Received 1202205 broadcasts (1202205 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 1202205 multicast, 0 pause input
0 input packets with dribble condition detected
83 packets output, 6682 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
bm18.lan#
bm18.lan#
Queue counter is reset to 0, and after 10-15 seconds I see 810,894 packets, although a sh Int gi0/10 I see only 83 outgoing packet!
Similar Messages
-
3560 mls qos interface statistics output
Hi
I've seen questions like this before, but never seen a satisfactory answer... I can't find any good documentation anywhere about this command.
If you run it, you get tabular output of some statistics - with no headers to the columns.
The closest thing I've found to it is in this document:
http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12113ea1/3550cr/cli2.htm#wp2418191
It shows the fields as: Incoming, No_Change, Classified, Policed and dropped.
I have a switch with a modified cos-dscp map so that cos 5 is marked to dscp 46. This shows normal traffic as in the row titled 0-4 in the 'incoming' column, and cos 5 traffic appears in the 40-44 row and the 'dropped' column... which can't be right.
Anyone know what the columns mean?
AaronI figured this out after looking at it sideways and upside down. Here is part of the output from the command I ran on one of our 3750 switches (copy it and paste it into notepad so the rows stretch back out): 'sh mls qos int f0/35 statistics'
dscp: outgoing
0 - 4 : 63683 0 0 0 0
5 - 9 : 0 0 0 0 0
10 - 14 : 0 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 81
25 - 29 : 0 0 0 0 0
30 - 34 : 0 0 0 0 13366
35 - 39 : 0 0 0 0 0
40 - 44 : 0 0 0 0 0
45 - 49 : 0 10749 0 13653 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 0 0 0 0
On the left side X - X are the DSCP values for the five columns of that row. For example, 20 - 24 row has the number 81 in the fith column. That shows that 81 packets with the DSCP value of 24 went out of that port. In row 45 - 49, 10749 packets with DSCP of 46 and 13653 packets with DSCP value of 48 went out that port.
I finally was able to use this table to show that a video conferencing unit was truely generating voice packets with DSCP 46 (EF), video packets with DSCP 34, and call control packets with DSCP 24 (this is COS 3 that is mapped to DSCP 24 in the cos-dscp map entry.)
So to clarify, the five columns have nothing to do with Incoming, No_Change, Classified, Policed and dropped, they represent the number of packets that have the DSCP values as referred to by the far left table.
Hope this helps. -
Hi, i have a phone thats no working fine, it unregister all the time from the sip server.
The port connected to the phone has output queues dropped on queue 1. ¿That's normal? ¿What could be the cause that there drop packet?
Thanks!
I have this configuration for Qos on the switch port:
interface FastEthernet0/15
switchport mode access
switchport voice vlan 15
priority-queue out
mls qos trust cos
spanning-tree portfast
sh mls qos int fa0/15 st
FastEthernet0/15 (All statistics are in packets)
dscp: incoming
0 - 4 : 184994 0 0 0 0
5 - 9 : 0 0 0 0 0
10 - 14 : 0 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 0
25 - 29 : 0 2298420 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 0 0 0 0 0
45 - 49 : 0 4806226 0 16934 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 0 0 0 0
60 - 64 : 0 0 0 0
dscp: outgoing
0 - 4 : 8134930 0 0 0 0
5 - 9 : 0 0 0 0 0
10 - 14 : 0 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 0
25 - 29 : 0 0 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 861 0 0 0 0
45 - 49 : 0 0 0 5 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 0 0 0 0
60 - 64 : 0 0 0 0
cos: incoming
0 - 4 : 875001 0 0 0 0
5 - 7 : 6544104 0 0
cos: outgoing
0 - 4 : 8781009 3 6 1 2
5 - 7 : 275463 5 17983
output queues enqueued:
queue: threshold1 threshold2 threshold3
queue 0: 292615 0 0
queue 1: 8562114 44049 5388502
queue 2: 0 0 0
queue 3: 17982 0 183824
output queues dropped:
queue: threshold1 threshold2 threshold3
queue 0: 0 0 0
queue 1: 5349 0 0
queue 2: 0 0 0
queue 3: 0 0 0
Policer: Inprofile: 0 OutofProfile: 0Martin,
Refer to this link you need to modify your buffers etc. :http://www.cisco.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/116089-technote-switches-output-drops-qos-00.html
-Terry
Please rate all helpful posts -
MLS QOS commands not accepted on 3800...what's the alternative?
ging from 3750 to 3800, MLS QOS commands not accepted on 3800...I'd heard that this command was deprecated, how do we translate our QoS statements onto the new platform?
To clarify, our 3750 mls qos statements are as follows:
mls qos map cos-dscp 0 8 16 26 32 46 48 56
mls qos srr-queue input bandwidth 90 10
mls qos srr-queue input threshold 1 8 16
mls qos srr-queue input threshold 2 34 66
mls qos srr-queue input buffers 67 33
mls qos srr-queue input cos-map queue 1 threshold 2 1
mls qos srr-queue input cos-map queue 1 threshold 3 0
mls qos srr-queue input cos-map queue 2 threshold 1 2
mls qos srr-queue input cos-map queue 2 threshold 2 4 6 7
mls qos srr-queue input cos-map queue 2 threshold 3 3 5
mls qos srr-queue input dscp-map queue 1 threshold 2 9 10 11 12 13 14 15
mls qos srr-queue input dscp-map queue 1 threshold 3 0 1 2 3 4 5 6 7
mls qos srr-queue input dscp-map queue 1 threshold 3 32
mls qos srr-queue input dscp-map queue 2 threshold 1 16 17 18 19 20 21 22 23
mls qos srr-queue input dscp-map queue 2 threshold 2 33 34 35 36 37 38 39 48
mls qos srr-queue input dscp-map queue 2 threshold 2 49 50 51 52 53 54 55 56
mls qos srr-queue input dscp-map queue 2 threshold 2 57 58 59 60 61 62 63
mls qos srr-queue input dscp-map queue 2 threshold 3 24 25 26 27 28 29 30 31
mls qos srr-queue input dscp-map queue 2 threshold 3 40 41 42 43 44 45 46 47
mls qos srr-queue output cos-map queue 1 threshold 3 5
mls qos srr-queue output cos-map queue 2 threshold 3 3 6 7
mls qos srr-queue output cos-map queue 3 threshold 3 2 4
mls qos srr-queue output cos-map queue 4 threshold 2 1
mls qos srr-queue output cos-map queue 4 threshold 3 0
mls qos srr-queue output dscp-map queue 1 threshold 3 40 41 42 43 44 45 46 47
mls qos srr-queue output dscp-map queue 2 threshold 3 24 25 26 27 28 29 30 31
mls qos srr-queue output dscp-map queue 2 threshold 3 48 49 50 51 52 53 54 55
mls qos srr-queue output dscp-map queue 2 threshold 3 56 57 58 59 60 61 62 63
mls qos srr-queue output dscp-map queue 3 threshold 3 16 17 18 19 20 21 22 23
mls qos srr-queue output dscp-map queue 3 threshold 3 32 33 34 35 36 37 38 39
mls qos srr-queue output dscp-map queue 4 threshold 1 8
mls qos srr-queue output dscp-map queue 4 threshold 2 9 10 11 12 13 14 15
mls qos srr-queue output dscp-map queue 4 threshold 3 0 1 2 3 4 5 6 7
mls qos queue-set output 1 threshold 1 138 138 92 138
mls qos queue-set output 1 threshold 2 138 138 92 400
mls qos queue-set output 1 threshold 3 36 77 100 318
mls qos queue-set output 1 threshold 4 20 50 67 400
mls qos queue-set output 2 threshold 1 149 149 100 149
mls qos queue-set output 2 threshold 2 118 118 100 235
mls qos queue-set output 2 threshold 3 41 68 100 272
mls qos queue-set output 2 threshold 4 42 72 100 242
mls qos queue-set output 1 buffers 10 10 26 54
mls qos queue-set output 2 buffers 16 6 17 61
mls qos
What would all this translate to on the 3800 platform? -
Good Morning, everyone. I am looking for some clarification with an existing 3750x Switch configuration.
I am reviewing the configuration of my network switches and found the following MLS QoS configuration on one of my switches and a partial of this same config on another switch. Can someone please explain what function, this line of code, is performing; and is it necessary?
mls qos map policed-dscp 0 14 24 30 38 to 8
mls qos map policed-dscp 10 to 12
mls qos map policed-dscp 12 to 14
mls qos map policed-dscp 26 to 28
mls qos map policed-dscp 28 to 30
mls qos map policed-dscp 32 to 34
mls qos map policed-dscp 34 to 36
mls qos map policed-dscp 36 to 38
mls qos map cos-dscp 0 8 16 24 34 46 48 56
mls qos srr-queue input bandwidth 70 30
mls qos srr-queue input threshold 1 80 90
mls qos srr-queue input threshold 2 80 90
mls qos srr-queue input priority-queue 2 bandwidth 30
mls qos srr-queue input dscp-map queue 1 threshold 2 16 24
mls qos srr-queue input dscp-map queue 1 threshold 3 48 56
mls qos srr-queue input dscp-map queue 2 threshold 1 36 38
mls qos srr-queue input dscp-map queue 2 threshold 2 32 34
mls qos srr-queue input dscp-map queue 2 threshold 3 40 46
mls qos srr-queue output cos-map queue 1 threshold 2 4
mls qos srr-queue output cos-map queue 1 threshold 3 5
mls qos srr-queue output cos-map queue 2 threshold 1 2
mls qos srr-queue output cos-map queue 2 threshold 2 3
mls qos srr-queue output cos-map queue 2 threshold 3 6 7
mls qos srr-queue output cos-map queue 3 threshold 3 0
mls qos srr-queue output cos-map queue 4 threshold 3 1
mls qos srr-queue output dscp-map queue 1 threshold 2 32 34
mls qos srr-queue output dscp-map queue 1 threshold 3 40 46
mls qos srr-queue output dscp-map queue 2 threshold 1 18 20 22 26 28 30
mls qos srr-queue output dscp-map queue 2 threshold 2 16 24
mls qos srr-queue output dscp-map queue 2 threshold 3 48 56
mls qos srr-queue output dscp-map queue 3 threshold 3 0
mls qos srr-queue output dscp-map queue 4 threshold 1 8
mls qos srr-queue output dscp-map queue 4 threshold 2 12 14
mls qos srr-queue output dscp-map queue 4 threshold 3 10
mls qos queue-set output 1 threshold 1 100 100 100 100
mls qos queue-set output 1 threshold 2 80 90 100 400
mls qos queue-set output 1 threshold 3 100 100 100 400
mls qos queue-set output 1 threshold 4 90 100 100 400
mls qos queue-set output 1 buffers 15 30 35 20
mls qos
If more information is required for a response, please let me know.
Thank you, E.Disclaimer
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The function of each command is perhaps best explained by the Command Reference and Software Configuration Guide for your IOS version. If you have a question that's unanswered by those, please post another question. BTW, Cisco also publishes whitepapers that further explain some subjects. There are a couple on 3750 QoS.
Regarding whether a particular command is necessary would depend on what your QoS policy is attempting to accomplish. -
Hello,
I have two switches with ios, I want to configure the qos, but I have the error message:
Will I need to update the ios or is the platform switch that does not supporting this command?
Switch Ports Model SW Version SW Image
* 1 50 WS-C2960-48TT-S 12.2 (46) SE C2960-LANLITEK9-M
* 1 50 WS-C2960-48TC-S 12.2 (50) SE5 C2960-LANLITEK9-M
Error:
SW(config)#mls qos map policed-dscp 0 10 18 to 8
^
Best RegardsI am answering this myself.
SW7(config)#mls qos srr input bandwidth ?
<1-100> enter bandwidth weight for queue id 1
SW7(config)#mls qos srr input bandwidth 1 ?
<1-100> enter bandwidth weight for queue id 2
SW7(config)#mls qos srr input bandwidth 1 1 ?
<cr>
Its the weight that we mention here. Not the percentage directly.
SW2#show mls qos input-queue
Queue : 1 2
buffers : 90 10
bandwidth : 100 100
priority : 40 0
threshold1: 100 100
threshold2: 100 100
This will give 40% priority BW to queue and remaining 60% will equally share between bot the queues as their weights are same.
CF -
Catalyst 3550 & 3560/3750 command 'show mls qos interface statistics'
On the Catalyst 3550 the command 'show mls qos interface statistics' will show ingress packet (or byte) counts with DSCP values. If you have policers configured then it also shows a count of packets that have been marked down to another DSCP value due to policing or any that have been dropped (obviously 'mls qos monitor dscp x' needs configuring). The same command on the 3560/3750 only shows the ingress & egress DSCP values, there is no column that shows packets (or bytes) that have been policed or dropped. Is there any command to display the same information with the 3560/3750?
Neither platform show counters when the command 'show policy-map interface x/x' is used so this won't work.
Thanks
AndyHi, I believe there is a command on the 3560 'sh mls qos interface policers' may be what you are looking for.
Here is what the command says it outputs:
To display QoS information at the interface level. This information includes:
The configuration of the egress queues and the CoS3-to-egress-queue map
Which interfaces have configured policers
Ingress and egress statistics, which includes the number of bytes that have been dropped -
Cisco 3560 switch| mls qos trust dscp question
Hi everybody
Hi everybody .
Please consider the following example:
3560 sw f1/1--------trunk---SW2
3560 sw
f1/1
mls qos trust dscp
3560 is using default cos-dscp map, assume a 3560 receives a frame carrying IP packet on f1/1 with COS 4, what will 3560 switch do?
1) will it use its default cos --dscp map ( cos 4--.dscp 32) and rewrite 32 in dscp field of the packet in the frame and provide PHB for dscp 32 ?
Much appreciated!!
Have a great weekend.Hi
No it will not trust the cos value, because You have configured to trust dcsp. So, the switch will trust the dcsp value in the incoming frame.
/Mikael -
Hi,
I have enable QoS in an access swtich.
By default all the ports are in untrusted state and I have configure the uplink (Te1/1) as trust and enable the priority queue.
The question is why the DSCP counters of the outgoing traffic in the uplink port increase? All the ports are untrusted, so all the DSCP marks in the incoming traffic of the access port will be mark down to DSCP 0, and the counters of the outgoing traffic in the uplink port should not increase.
Any idea?
Could be traffic generated by the swtich that is mark?
Switch#sh mls qos interface Te1/1 statistics | begin outgoing
TenGigabitEthernet1/1 (All statistics are in packets)
dscp: outgoing
0 - 4 : 4958093 3 0 0 0
5 - 9 : 0 0 0 15 0
10 - 14 : 1389 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 0
25 - 29 : 0 135485 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 3 0 0 0 0
45 - 49 : 0 569772 0 332627 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 0 0 0 0
60 - 64 : 0 0 0 0
Thanks in advance.Hi,
I check and "mls qos" is enable, all acces port are untrusted and only de uplink port is configure us trust and with priority queue.
I don't know why increase the output DSCP counters in the uplink port.
Switch#sh mls qos interface Te1/1 statistics | begin outgoing
TenGigabitEthernet1/1 (All statistics are in packets)
dscp: outgoing
0 - 4 : 4958093 3 0 0 0
5 - 9 : 0 0 0 15 0
10 - 14 : 1389 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 0
25 - 29 : 0 135485 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 3 0 0 0 0
45 - 49 : 0 569772 0 332627 0
50 - 54 : 0 0 0 0 0
55 - 59 : 0 0 0 0 0
60 - 64 : 0 0 0 0
thanks. -
Hi all,
I wanted to get to know more about QoS and thought that there was no better way than document and understand the output of auto qos.
However I want to verify some things to check that I understand it correctly.
The 2 commands I want to check on are the following:
mls qos queue-set output 1 buffers 15 25 40 20
mls qos queue-set output 1 threshold 4 60 150 50 200
mls qos queue-set output 1 buffers 15 25 40 20, this command divides the port buffer space between the 4 egress queues.
1. Does it always need to add up to 100%? Or if it doesn't, will the remaining percentages be added to the common pool?
mls qos queue-set output 1 threshold 4 60 150 50 200
Are the following statements correct?
2. packets belonging to queue 4 threshold 1, will be dropped when the port buffer for queue 4 is 60% full (60% of 20 buffers = 12 buffers)?
3. packets belonging to queue 4 threshold 2, will be dropped when the port buffer for queue 4 is 150% full (150% of 20 buffers = 30 buffers)?
3b. how does this work? since this are more buffers than reserved or available for the queue? what if no more buffers remain in the common pool?
4. packets belonging to queue 4 threshold 3, will be dropped when the port buffer for queue 4 is 100% full (100% of 20 buffers = 20 buffers)?
5.the queue can steal up to 200% buffers from the common pool, can this ever be reached? since we will be dropping at 60% (th1), 150% (th2) and 100% (th3) so we will max reach 150% and not 200%?Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
#1 It's recommended sum of all four queues buffers equal 100%. I don't know what happens if they they don't.
#2 Yes and no, it's 60% of 20%.
#3 Yes and no, it's 150% of 20%.
#3b If not buffers to borrow from common pool, it will drop.
#4 No, it's 200% of 20%.
#5 Yes, buffers are borrowed are (attempted) borrowed from common pool when reserve buffers are all used (and WTD not reached). Th3 is 200%, not 100% of 20%.
Great document on 3560/3750 buffering: https://supportforums.cisco.com/document/31581/egress-qos -
Enabling MLS QOS on 2960S seems to "throttle" bandwidth when using a specific Mitel 5320 phone. I have a PC behind the Mitel and the performance is way slower. Validated via a speed test. Once I remove the MLS QOS globally, the performance is greatly improved, about doubled. This is causing some issues as users with this particular phone attached with a PC behind the phone are starting to complain. What could be causing this or what settings to overcome this?
Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Enabling QoS on a 2960/3560/3750, using defaults, often results in slow transfer performance. This because the default buffer settings often increase drop rates in the newly enabled egress queues. Manual buffer tuning might mitigate. -
I can't understand dropping algorithm used by WTD on Catalyst 3750.
Giving the following configuration:
Switch(config)# mls qos queue-set output 2 buffers 40 20 20 20
Switch(config)# mls qos queue-set output 2 threshold 2 40 60 100 200
1. What happens if buffer utilization for queue 2 is between drop-threshold1 and drop-threshold2? Are the packets dropped using a specific algorithm as in WRED?
2. What happens if buffer utilization for queue 2 is between drop-threshold2 and maximum threshold? Are the packets dropped using another algorithm?
3. Is it true that with buffer utilization above maximum threshold all packets are dropped?
Thanks
StefanoParesh,
thanks a lot for your suggestions!
Anyway I still have some doubt related to WTD thresholds. The sintax is the following:
mls qos queue-set output qset-id threshold queue-id drop-threshold1 drop-threshold2 reserved-threshold maximum-threshold
For drop-threshold1 and drop-threshold2 the range is 1 to 400 percent. For reserved-threshold the range is 1 to 100 percent.
By default, drop-threshold1 and drop-threshold2 for queues 1, 3, and 4 are set to 100
percent. Drop-threshold1 and drop-threshold2 for queue 2 are set to 50 percent. The reserved
thresholds for queues 1, 3, and 4 are set to 50 percent. The reserved
threshold for queue 2 is set to 100 percent. The maximum thresholds for
all queues are set to 400 percent.
With these default settings, queue 2 has drop-threshold1 and drop-threshold2 set to 50 percent and reserved threshold set to 100 percent.
The problem is that drop-thresolds are percentage values related to the ENTIRE buffer, reserved threshold is related to the specific queue's buffer.
So with default settings (1/4 of total buffer for each queue) reserved threshold seems to be HIGHER than drop-thresolds!!!
reserved threshold = 1/4 total buffer
drop thresholds = 50% over 400% total buffer = 1/8 total buffer
Maybe there's something missing...
Thanks
Stefano -
Version 03.03.00.XO - MLS QOS not supported
Hi All,
Anyone face the same problem with the following IOS Version?
MLS QOS is not supported in global command.
Switch#sh ver
Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500es8-UNIVERSALK9-M), Version 03.03.00.XO RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2013 by Cisco Systems, Inc.
Compiled Wed 14-Aug-13 07:26 by prod_rel_team
Cisco IOS-XE software, Copyright (c) 2005-2013 by cisco Systems, Inc.
All rights reserved. Certain components of Cisco IOS-XE software are
licensed under the GNU General Public License ("GPL") Version 2.0. The
software code licensed under GPL Version 2.0 is free software that comes
with ABSOLUTELY NO WARRANTY. You can redistribute and/or modify such
GPL code under the terms of GPL Version 2.0. For more details, see the
documentation or "License Notice" file accompanying the IOS-XE software,
or the applicable URL provided on the flyer accompanying the IOS-XE
software.
ROM: 15.1(1r)SG2
Switch uptime is 6 minutes
System returned to ROM by power-on
Running default software
Jawa Revision 3, RadTrooper Revision 0x0.0x41, Conan Revision 0x1449
Last reload reason: power-on
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
[email protected].
License Information for 'WS-X45-SUP8-E'
License Level: entservices Type: Permanent
Next reboot license Level: entservices
cisco WS-C4506-E (P5040) processor (revision 2) with 4194304K bytes of physical memory.
Processor board ID FXS1812Q346
P5040 CPU at 2.2GHz, Supervisor 8-E
Last reset from PowerUp
1 Virtual Ethernet interface
20 Ten Gigabit Ethernet interfaces
511K bytes of non-volatile configuration memory.
Configuration register is 0x2101
SWITCH(config)#mls qos
^
% Invalid input detected at '^' marker.
SWITCH(config)#
SWITCH(config)#?
Configure commands:
aaa Authentication, Authorization and Accounting.
access-list Add an access list entry
access-session Access Sesion Global Configuration Commands
agent-server Modify DNS server properties
alias Create command alias
ancp Configure ANCP
archive Archive the configuration
arp Set a static ARP entry
async-bootp Modify system bootp parameters
audit Router Audit
authentication Auth Manager Global Configuration Commands
auto Configure Automation
banner Define a login banner
beep Configure BEEP (Blocks Extensible Exchange
Protocol)
bfd BFD configuration commands
bfd-template BFD template configuration
boot Modify system boot parameters
bridge Bridge Group.
buffers Adjust system buffer pool parameters
bulkstat Bulkstat Application
call-home Enter call-home configuration mode
cdp Global CDP configuration subcommands
cef Cisco Express Forwarding
cisp Set CISP parameters
class-map Configure CPL Class Map
clns Global CLNS configuration subcommands
clock Configure time-of-day clock
cluster Cluster configuration commands
cns CNS agents
comet-server Configure comet-server properties
config-register Define the configuration register
configuration Configuration access
control-plane Configure control plane services
crypto Encryption module
cts Cisco Trusted Security commands
default Set a command to its defaults
default-value Default character-bits values
define interface range macro definition
device-sensor IOS Sensor Commands
diagnostic Configure diagnostic information
dns-server Modify DNS server properties
dnsix-dmdp Provide DMDP service for DNSIX
dnsix-nat Provide DNSIX service for audit trails
do-exec To run exec commands in config mode
dot1x IEEE 802.1X Global Configuration Commands
downward-compatible-config Generate a configuration compatible with older
software
eap EAP Global Configuration Commands
emm Specify pre-loading of MDF
enable Modify enable password parameters
end Exit from configure mode
energywise EnergyWise Global Configuration Commands
epm EPM Global Configuration Commands
errdisable Error disable
ethernet Ethernet configuration
event Event related configuration commands
exception Exception handling
exit Exit from configure mode
fallback Fallback configuration commands
fhrp Configure First Hop Redundancy Protocols
file Adjust file system parameters
fips FIPS mode after next reload
flow Global Flow configuration subcommands
format Format the output
global-address-family Enter address-family base routing topology mode
help Description of the interactive help system
hostname Set system's network name
hw-module Apply command (e.g. shutdown) to specified
hardware target
hw-module Control of individual components in the system
hw-switch Control of individual components in the switch
id-manager ID Pool Manager
identity Identity Configuration Commands
infra-test Configure end2end properties
interface Select an interface to configure
ip Global IP configuration subcommands
ipc Configure IPC system
ipv6 Global IPv6 configuration commands
isis Global ISIS configuration subcommands
issu no description
key Key management
kron Kron interval Facility
l2 Layer 2
l2protocol-tunnel Tunnel Layer2 protocols
lacp LACP configuration
li-view LI View
license Configure License
line Configure a terminal line
link Enable Link State Tracking feature
lldp Global LLDP configuration subcommands
location Global location configuration commands
logging Modify message logging facilities
login Enable secure login checking
mab MAC Authentication Bypass Global Configuration
Commands
mac Global MAC configuration subcommands
macro Macro configuration
media-proxy Global media proxy configuration
mediatrace Mediatrace Application
memory Configure memory management
metadata Metadata Application
mka MACsec Key Agreement (MKA) configuration
module Module
monitor Monitoring different system events
mvr Enable/Disable MVR on the switch
netconf Configure NETCONF
Thank you.Hi,
QOS implementation has radically changed since the advent of
sup-7 & later
You no longer set mls qos as qos is on the engine by default.
Please see the following links
http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-4500-series-switches/white_paper_c11-539588.html
"Ingress QoS: Default Actions
First and foremost, QoS does not need to be enabled on the Supervisor Engine, it is on by default in compliance with the MQC construct.
When a packet arrives at an interface, there are two options to take into consideration: is there a policy attached or not? If the packet arrives with or without a marking and there is not a policy attached to the interface, packets will flow through the switch untouched. There are no questions as to where the packet came from or if it has a valid marking. If the packet arrives with or without a marking, and a policy is attached to the interface, the packet will only then be subject to the policy classification."
And the config guide
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/15-1/XE_330SG/configuration/guide/config/qos_mrg.html#wp1461453
Hope this helps
Regards
Alex -
Hello world!
I want to enable qos on a 3560 switch,
So, I put:
Overall setup mode "mls qos"
Question:
is what it is Verily nessaiire to interface configuration mode: "mls qos trust"?
Regards,Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Generally, on many Catalyst switches, once you enable QoS, they will erase an ingress CoS/ToS markings unless your trust it or otherwise (i.e. policy) maintain it.
I.e. the answer to your question is an "it depends"; but unless you want the markings reset to zero, the answer is probably yes (you want to trust). -
Mls qos trust dscp??? is setting my DSCP values to zero!?
Hi,
I was just doing some testing to ensure that the command 'mls qos trust dscp' is working on my 6509 switches before rolling out QoS.
Before adding any configuration I could see using wireshark that traffic from my Avaya 9608 handset was coming through with a DSCP value of 46 (as it is supposed to).
I then added the command 'mls qos' (at global level)
on examining the wireshark output this time, the DSCP value had been set to zero (i.e. it defaulted it to best effort)
I then expected by adding the commmand 'mls qos trust dscp' on the interface the phone is connected to that the DSCP value would would again be left alone?
does anybody know why this is happening?
Many thanks in advance.
AndyHi,
thanks for your reply.
mls qos
interface GigabitEthernet3/34
description *** DATA VLAN 35 - VOICE VLAN 34 ***
switchport
switchport trunk native vlan 36
switchport trunk allowed vlan 34,36
switchport mode trunk
mls qos trust dscp
no cdp enable
spanning-tree portfast trunk
If i don't include the global 'mls qos' command then the voice packets keep the dscp 46 value. If I add the mls qos command this causes the switch to set the dscp values to zero.
Thanks again
ps. there are some other mls commands on the switch... i don't know if these could interfere but they were already on there so i'm reluctant to remove them..
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