Catalyst 3850 have max speed of 60Mbps on the download but the upload is totally fine.

[Zabih]

Hi all,

we have installed a new switch (Catalyst 3850) to go out to the internet for our company, but for some reasons i am unable to achieve any higher speed than 60Mbps on the download while the upload goes upto 900Mbps,

below is the port which is output of command " show interfaces gigabitEthernet 1/1/1" of our WAN port.

GigabitEthernet1/1/1 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 00ca.e526.1419 (bia 00ca.e526.1419)
Description: TRUNK-TO-CORE7-FBP2
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 10/255, rxload 30/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseSX SFP
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 69656674
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 121015000 bits/sec, 33425 packets/sec
5 minute output rate 41321000 bits/sec, 33128 packets/sec
4173337882 packets input, 1363078568988 bytes, 0 no buffer
Received 342457503 broadcasts (285961862 multicasts)
0 runts, 0 giants, 0 throttles
2 input errors, 2 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 285961862 multicast, 0 pause input
0 input packets with dribble condition detected
4326404544 packets output, 715969026469 bytes, 0 underruns
69656674 output errors, 0 collisions, 2 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

can anyone please help.

i am not very good at cisco. :/

[Georg Pauwen]

Hello,

what is connected on the other end ? There is not very much you can configure on the GigabitEthernet interface yourself. Do you have any QoS configured on the switch ?

Post the full config, there might be something in there that limits the download speed...

[Zabih]

Hi Gerog,

thanks for the response,

on the other end of the switch we have another 3850 which is in a different location and they are connected via fiber.

which config would you like to see? could you please give me the command?

regards

[Georg Pauwen]

Hello,

the full configs of bot switches would be useful, to see if there is anything in there limiting the download...

[Zabih]

Hi Georg,

please find below,

Building configuration...

Current configuration : 10730 bytes
!
! Last configuration change at 20:25:08 UTC Sun Apr 30 2017 
! NVRAM config last updated at 20:25:15 UTC Sun Apr 30 2017 
!
version 15.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
service compress-config
!
hostname core-5
!
boot-start-marker
boot-end-marker
!
!
vrf definition Mgmt-vrf
!
address-family ipv4
exit-address-family
!
address-family ipv6
exit-address-family
!
switch 1 provision ws-c3850-24t
!
!
!
!
!
ip routing
!
no ip domain-lookup
!
!
qos queue-softmax-multiplier 100
!

diagnostic bootup level minimal
!
spanning-tree mode rapid-pvst
spanning-tree extend system-id
spanning-tree vlan 1-4094 priority 12288
hw-switch switch 1 logging onboard message level 3
!
redundancy
mode sso
!
!
track 1 interface GigabitEthernet1/1/1 line-protocol
!
!
class-map match-any non-client-nrt-class
!
policy-map port_child_policy
class non-client-nrt-class
bandwidth remaining ratio 10
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface GigabitEthernet0/0
vrf forwarding Mgmt-vrf
no ip address
negotiation auto
!
interface GigabitEthernet1/0/1
!
interface GigabitEthernet1/0/2
!
interface GigabitEthernet1/0/3
!
interface GigabitEthernet1/0/4
!
interface GigabitEthernet1/0/5
description TRUNK-TO-SW31-GEP50
switchport mode trunk
!
interface GigabitEthernet1/0/6
description Mikrotik-ETH4(VLAN-998)
switchport access vlan 998
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/7
description iDirect-MSTR-RTR-GEP0/2
switchport access vlan 147
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/8
description TRUNK-TO-iDirect-PSV-SW13-GEP0/2
switchport trunk allowed vlan 99,138,139,147,148,200,201,707,808,999
switchport mode trunk
!
interface GigabitEthernet1/0/9
description TRUNK-TO-SW24-FEP1
switchport mode trunk
!
interface GigabitEthernet1/0/10
description TRUNK-TO-SW28-FEP25
switchport mode trunk
!
interface GigabitEthernet1/0/11
description TRUNK-TO-SW19-FEP26
switchport mode trunk
!
interface GigabitEthernet1/0/12
description Mikrotik-ETH6(Poulsat Mesh Interface)
switchport access vlan 997
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/13
description TRUNK-TO-SNG-SW41-CH3
switchport mode trunk
!
interface GigabitEthernet1/0/14
description TRUNK-TO-SW88-FEP48
switchport mode trunk
!
interface GigabitEthernet1/0/15
description RD6000-MGMT
switchport access vlan 999
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/16
description RD6000-MPEGIP1
switchport access vlan 256
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/17
description Mikrotik-ETH2(VLAN-999)
switchport access vlan 999
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/18
description Mikrotik-ETH3(VLAN-99)
switchport access vlan 99
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/19
description Mikrotik-ETH1(VLAN-157)
switchport access vlan 157
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/20
description IRINN-TV-COSHIP
switchport access vlan 157
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/21
!
interface GigabitEthernet1/0/22
description NS1-DNS-SERVER
switchport access vlan 157
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/23
description ! LOCAL ACCESS ONLY !
switchport access vlan 999
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/24
description ! LOCAL ACCESS ONLY !
switchport access vlan 99
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/1/1
description TRUNK-TO-CORE7-FBP2
switchport mode trunk
!
interface GigabitEthernet1/1/2
!
interface GigabitEthernet1/1/3
description TRUNK-TO-SW30-FBP25
switchport mode trunk
!
interface GigabitEthernet1/1/4
description TRUNK-TO-CORE4-FBP4
switchport mode trunk
!
interface TenGigabitEthernet1/1/1
!
interface TenGigabitEthernet1/1/2
!
interface TenGigabitEthernet1/1/3
!
interface TenGigabitEthernet1/1/4
!
interface Vlan1
no ip address
shutdown
!
interface Vlan99
ip address
!
interface Vlan100
ip address
standby 4 ip
standby 4 timers msec 100 msec 300
standby 4 priority 150
standby 4 preempt delay minimum 5
standby 4 authentication md5 key-string 7 1520060D103E3F337B64
standby 4 track 1 decrement 60
!
interface Vlan138
ip address
standby 8 ip
standby 8 timers msec 100 msec 300
standby 8 preempt
standby 8 authentication md5 key-string 7 122B0816061F1813797C
!
interface Vlan140
ip address
!
interface Vlan147
ip address
standby 5 ip
standby 5 timers msec 100 msec 300
standby 5 preempt
standby 5 authentication md5 key-string 7 13371A131F18103D7873
!
interface Vlan155
ip address
!
interface Vlan157
ip address
standby 1 ip
standby 1 timers msec 100 msec 300
standby 1 preempt
standby 1 authentication md5 key-string 7 0336560A121B355B1D5E
!
interface Vlan199
ip address
standby 9 ip
standby 9 timers msec 100 msec 300
standby 9 priority 150
standby 9 preempt delay minimum 5
standby 9 authentication md5 key-string 7 122B0816061F1813797C
standby 9 track 1 decrement 60
!
interface Vlan200
ip address
!
interface Vlan777
ip address
standby 10 ip
standby 10 timers msec 100 msec 300
standby 10 priority 150
standby 10 preempt delay minimum 5
standby 10 authentication md5 key-string 7 097E43080D110305585B
standby 10 track 1 decrement 60
!
interface Vlan999
ip address
!
ip forward-protocol nd
ip http server
ip http authentication local
ip http secure-server
ip ssh version 2
!
!
!
snmp-server community public RO
!
^C
!
line con 0
password 7 05390B0E35585A1E4A52
logging synchronous
login
stopbits 1
line aux 0
stopbits 1
line vty 0 4
login local
transport input ssh
line vty 5 15
login local
transport input ssh
!
ntp server 217.114.59.3
wsma agent exec
profile httplistener
profile httpslistener
!
wsma agent config
profile httplistener
profile httpslistener
!
wsma agent filesys
profile httplistener
profile httpslistener
!
wsma agent notify
profile httplistener
profile httpslistener
!
!
wsma profile listener httplistener
transport http
!
wsma profile listener httpslistener
transport https
!
ap group default-group
end

regards

[Georg Pauwen]

Hello,

you could do the following, which is configuring:

auto qos trust dscp

on the GigabitEthernet1/1/1 interface.

Then use the command 'show auto qos interface
gigabitethernet 3/0/1'

to display the traffic classes and their usage. That said, a limit of 90MB down almost sounds like a physical problem. That is obviously very basic troubleshooting, but you might want to try and replace the cables connected...

[Zabih]

Hi,

we have two different links, both using the same router 3850, one using copper and the second using fiber, both of them were totally fine before we changed from allied telesys to cisco catalyst. what bothers me the most is that upload is perfectly fine, as i mentioned earlier it reaches upto 900mbps but the download is more than 10 times slower.

I did apply the commands which you provided but no change at all...

[Georg Pauwen]

Hello,

can you post the output of  'show auto qos interface
gigabitethernet 1/1/1' ?

Maybe there is a hint in there which traffic is filling up the interface queues...

[Zabih]

this is what i get after executing the command,

core-5#show auto qos interface gigabitEthernet 1/1/1
GigabitEthernet1/1/1
auto qos trust dscp

[Georg Pauwen]

Hello,

ok, no output.

The only thing you can change on the interface is speed and duplex. Try and manually configure the speed and duplex. The available settings depend on the transceivers or ports used. Try 'speed 1000' and 'duplex full' or 'duplex auto'. Also, if there is an 'mdix' option, try and enable that.

[Zabih]

would this help?

GigabitEthernet1/1/1 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 00ca.e526.1419 (bia 00ca.e526.1419)
Description: TRUNK-TO-CORE7-FBP2
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 9/255, rxload 22/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseSX SFP
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:01, output never, output hang never
Last clearing of "show interface" counters never
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 86907000 bits/sec, 28183 packets/sec
5 minute output rate 37672000 bits/sec, 28856 packets/sec
5978822372 packets input, 2042599999201 bytes, 0 no buffer
Received 342621180 broadcasts (286118729 multicasts)
0 runts, 0 giants, 0 throttles
3 input errors, 3 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 286118729 multicast, 0 pause input
0 input packets with dribble condition detected
6169410784 packets output, 1027813014093 bytes, 0 underruns
0 output errors, 0 collisions, 2 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

[Georg Pauwen]

Hello,

from the output, the interface looks perfectly fine. Can you post the same output from the interface on the other side ? Also, do you have a spare SFP transceiver that you can use to replace this one ?

[Zabih]

GigabitEthernet1/1/2 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 188b.45ea.599a (bia 188b.45ea.599a)
Description: TRUNK-TO-CORE5-FBP1
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 21/255, rxload 10/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseSX SFP
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 5488703
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 39530000 bits/sec, 27085 packets/sec
5 minute output rate 83588000 bits/sec, 25924 packets/sec
6186530316 packets input, 1030814703875 bytes, 0 no buffer
Received 363297384 broadcasts (307803723 multicasts)
0 runts, 0 giants, 0 throttles
4 input errors, 2 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 307803723 multicast, 0 pause input
0 input packets with dribble condition detected
5995350301 packets output, 2049304680845 bytes, 0 underruns
5488703 output errors, 0 collisions, 2 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

I do have a spare SFP, but that would mean a total network outage, and also i am seeing the same issue on the other switch which is using copper.

[Georg Pauwen]

Hello,

I don't think the switch or the link between the switches is the problem. Which port is connected to your ISP ?

[Zabih]

Hi George,

please find below the config for the port connected to the ISP,

GigabitEthernet1/0/6 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 188b.45ea.5986 (bia 188b.45ea.5986)
Description: TRAFFIC-CORE2-GEP(0/2)-BGP(RTR)
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 9/255, rxload 24/255
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 00:00:34, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 94786000 bits/sec, 28498 packets/sec
5 minute output rate 36349000 bits/sec, 28967 packets/sec
5858141334 packets input, 2036271639179 bytes, 0 no buffer
Received 256628 broadcasts (256542 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 256542 multicast, 0 pause input
0 input packets with dribble condition detected
6075744855 packets output, 879609351383 bytes, 0 underruns
0 output errors, 0 collisions, 1 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

regards