Cisco WS-C3850-24XS-S Very Slow Speed Rate

[tanios191]

Hello Team,

Please I need your help I have a Cisco WS-C3850-24XS-S switch with very low speed data rate this is between 2 hosts in the same VLAN or Layer 2 Domain

Please assist

[Flavio Miranda]

Hi

 In order to get helped, please share the switch´s configuration here.

Keep in mind that the switch may not be the problem. Which test are you doing, how are you doing the test? Which service is slow?  When you ping your gateway or outside the network how´s that looks like?

[tanios191]

Hi Flavio,

Please find attached

Please note that this is between 2 servers on the same subnet so it is only layer 2 communication the gateway is this switch

[Flavio Miranda]

Can you sent the output of " show proc cpu hist "

[tanios191]

sh processes cpu history

11111 1111111111 11111 11111
663333377777111112222266666666662222277777666662222266666666
100
90
80
70
60
50
40
30
20
10 **********************************************************
0....5....1....1....2....2....3....3....4....4....5....5....6
0 5 0 5 0 5 0 5 0 5 0
CPU% per second (last 60 seconds)

111111111111111111111111111111121111111111111111121122111111
223422533452332253143232425654332523411312342662212325445433
100
90
80
70
60
50
40
30 *
20 * * * *** * * ** * ** *
10 ##########################################################
0....5....1....1....2....2....3....3....4....4....5....5....6
0 5 0 5 0 5 0 5 0 5 0
CPU% per minute (last 60 minutes)
* = maximum CPU% # = average CPU%

221111111111111111111111111111111111111111111111111111111111111111111111
666567786669565786975686767687556666767697667556667667869686686677866656
100
90
80
70
60
50
40
30 **
20 **********************************************************************
10 ######################################################################
0....5....1....1....2....2....3....3....4....4....5....5....6....6....7..
0 5 0 5 0 5 0 5 0 5 0 5 0
CPU% per hour (last 72 hours)
* = maximum CPU% # = average CPU%

[Flavio Miranda]

Switch is fine for CPU.

 The problem seems to me related to the policy to put on the ports

interface TenGigabitEthernet1/0/7
switchport access vlan 18
spanning-tree portfast
service-policy output NODROP
hold-queue 240000 in

Take two ports, remove that config and test again.

Other configuration that might cause the problem would be this "wsma agent exec"

If I understood correctly, this agent sends the traffic to another device first, which means, the traffic is not only traveling between interfaces. Is this some kind of URL filter ?

[Joseph W. Doherty]

Both hosts directly connected to the same 3850?

You've checked interfaces for errors and/or running gig in full duplex mode?

[tanios191]

yes same switch no there is no errors at all in both interface Te2/0/17 and Te1/0/18:

sh interface TenGigabitEthernet2/0/17
TenGigabitEthernet2/0/17 is up, line protocol is up (connected)
Hardware is Ten Gigabit Ethernet, address is 5006.abf5.7411 (bia 5006.abf5.7411)
MTU 1500 bytes, BW 10000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 10Gb/s, link type is auto, media type is SFP-10GBase-SR
input flow-control is on, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, output hang never
Last clearing of "show interface" counters 1y20w
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: Class-based queueing
Output queue: 0/40 (size/max)
5 minute input rate 14825000 bits/sec, 5402 packets/sec
5 minute output rate 65798000 bits/sec, 7222 packets/sec
98132404852 packets input, 53009491503006 bytes, 0 no buffer
Received 63099354 broadcasts (9807091 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 9807091 multicast, 0 pause input
0 input packets with dribble condition detected
110628572805 packets output, 96497709186799 bytes, 0 underruns
Output 1079723478 broadcasts (0 multicasts)
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

TenGigabitEthernet1/0/18 is up, line protocol is up (connected)
Hardware is Ten Gigabit Ethernet, address is 188b.4530.bb92 (bia 188b.4530.bb92)
MTU 1500 bytes, BW 10000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 10Gb/s, link type is auto, media type is SFP-10GBase-SR
input flow-control is on, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, output hang never
Last clearing of "show interface" counters 1y20w
Input queue: 0/20000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: Class-based queueing
Output queue: 0/40 (size/max)
5 minute input rate 50886000 bits/sec, 5875 packets/sec
5 minute output rate 16803000 bits/sec, 3121 packets/sec
7811372271 packets input, 6489993063613 bytes, 0 no buffer
Received 893630 broadcasts (85093 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 85093 multicast, 0 pause input
0 input packets with dribble condition detected
10793466678 packets output, 9093662447790 bytes, 0 underruns
Output 1178754315 broadcasts (0 multicasts)
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

[Joseph W. Doherty]

To confirm, both hosts are the only other device on the other end of the 10g SX fiber?

If so, these hosts are some kind of VM server (as I see links are trunks)?

Why t1/0/18 have a input queue of 20K?

As @Flavio Miranda asked earlier, what, exactly, are you doing that appears slow?