Buy or Renew
Buy or Renew
Cisco + Splunk: It’s a new day for your data. Learn more.
 
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 
cancel
Start a conversation
6018
Views
0
Helpful
46
Replies

3750X Poor Performance

Ryan Fisher
Level 1
Level 1

‎10-19-2018 04:38 PM - edited ‎03-08-2019 04:25 PM

I have a bit of an odd situation.  At my DR site, I used to have 2 3560 switches that were port-channeled together.  I recently swapped those switches out for 2 3750X switches in a stack, and copied the identical configuration on them as the original 3560 switches.

 

I have a 1gb WAN connection from my main site that I use mostly for my SAN replication, and with the old 3560 switches, I was able to max out that circuit and push almost a whole 1gb bandwidth.  After this swap with the new 3750X switches, I can't get it to pass more than 200mb on that port.  Like I said, these switches have the same config on them, so there's nothing new there.  There is also no QoS either.  I've checked ports for errors, and there are none and they are negotiated properly at 1000-full.  I'm out of ideas on things to check, and would greatly appreciate any guidance of things I could look at.

 

Thanks!

 

drcore01-3750x#sh int gi1/0/48
GigabitEthernet1/0/48 is up, line protocol is up (connected) 
  Hardware is Gigabit Ethernet, address is 6c20.564d.4ab0 (bia 6c20.564d.4ab0)
  Description: cox 1gb metroE
  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec, 
     reliability 255/255, txload 2/255, rxload 49/255
  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 00:00:01, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 142
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 195645000 bits/sec, 17395 packets/sec
  5 minute output rate 11115000 bits/sec, 12417 packets/sec
     317861817 packets input, 444836613365 bytes, 0 no buffer
     Received 164662 broadcasts (161104 multicasts)
     0 runts, 0 giants, 0 throttles 
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 161104 multicast, 0 pause input
     0 input packets with dribble condition detected
     237971247 packets output, 40530223909 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
drcore01-3750x#sh run int gi1/0/48
Building configuration...

Current configuration : 190 bytes
!
interface GigabitEthernet1/0/48
 description cox 1gb metroE
 switchport trunk allowed vlan 1,15,501,521,920,980
 switchport trunk encapsulation dot1q
 switchport mode trunk
end
Switch Ports Model                     SW Version            SW Image                 
------ ----- -----                     ----------            ----------               
*    1 54    WS-C3750X-48              15.2(4)E6             C3750E-UNIVERSALK9-M     
     2 54    WS-C3750X-48              15.2(4)E6             C3750E-UNIVERSALK9-M
Labels:
0 Helpful
46 Replies 46

johnd2310
Level 8
Level 8

‎10-19-2018 06:31 PM

Hi,

I would look at the code you are running. What code was running on the 3560? What features are you running? I have seen more issues with 15.2 code  than 12.2.55. Start by looking at 12.2.55-SE10/SE11

 

Thanks

John

**Please rate posts you find helpful**
0 Helpful

balaji.bandi
Hall of Fame
Hall of Fame
In response to johnd2310

‎10-20-2018 12:43 AM

SE12 is good candidate for 12.X

 

BB

***** Rate All Helpful Responses *****

How to Ask The Cisco Community for Help

0 Helpful

Georg Pauwen
VIP
VIP

‎10-20-2018 01:22 AM

Hello,

 

on a side note, post the output of 'show buffers'. Buffer tuning can make a difference in certain situations and with certain traffic...

0 Helpful

Ryan Fisher
Level 1
Level 1
In response to Georg Pauwen

‎10-22-2018 09:03 AM - edited ‎10-22-2018 09:05 AM

Thanks for replying.  The version on the old switch was 12.2(58)SE2.  I can try back-revving it to an older 12 version to see if that makes a difference.  I'm not running any features that would be out of the ordinary, ip-services license.

 

Here's the output of show buffers

 

drcore01-3750x#sh buffers 
Buffer elements:
     2748 in free list 
     30851094 hits, 0 misses, 2266 created

Public buffer pools:
Small buffers, 104 bytes (total 50, permanent 50, peak 191 @ 2d21h):
     49 in free list (20 min, 150 max allowed)
     15267475 hits, 59 misses, 170 trims, 170 created
     0 failures (0 no memory)
Middle buffers, 600 bytes (total 25, permanent 25, peak 79 @ 2d21h):
     24 in free list (10 min, 150 max allowed)
     89808 hits, 22 misses, 66 trims, 66 created
     0 failures (0 no memory)
Big buffers, 1536 bytes (total 50, permanent 50, peak 218 @ 2d21h):
     19 in free list (5 min, 150 max allowed)
     2277029 hits, 56 misses, 168 trims, 168 created
     0 failures (0 no memory)
VeryBig buffers, 4520 bytes (total 16, permanent 10, peak 16 @ 2d21h):
     1 in free list (0 min, 100 max allowed)
     74 hits, 3 misses, 25 trims, 31 created
     0 failures (0 no memory)
Large buffers, 5024 bytes (total 1, permanent 0, peak 1 @ 2d21h):
     1 in free list (0 min, 10 max allowed)
     0 hits, 0 misses, 25 trims, 26 created
     0 failures (0 no memory)
Huge buffers, 18024 bytes (total 1, permanent 0, peak 1 @ 2d21h):
     1 in free list (0 min, 4 max allowed)
     0 hits, 0 misses, 25 trims, 26 created
     0 failures (0 no memory)

Interface buffer pools:
Generic ED Pool buffers, 512 bytes (total 101, permanent 100, peak 101 @ 2d21h):
     101 in free list (100 min, 100 max allowed)
     0 hits, 0 misses
Syslog ED Pool buffers, 600 bytes (total 133, permanent 132, peak 133 @ 2d21h):
     101 in free list (132 min, 132 max allowed)
     207 hits, 0 misses
RxQ1 buffers, 2040 bytes (total 128, permanent 128):
     4 in free list (0 min, 128 max allowed)
     1716870 hits, 65440 fallbacks
RxQ2 buffers, 2040 bytes (total 128, permanent 128):
     1 in free list (0 min, 128 max allowed)
     29429 hits, 229 fallbacks, 0 trims, 0 created
     229 failures (0 no memory)
RxQ3 buffers, 2040 bytes (total 128, permanent 128):
     1 in free list (0 min, 128 max allowed)
     642739 hits, 10994 fallbacks
RxQ4 buffers, 2040 bytes (total 128, permanent 128):
     0 in free list (0 min, 128 max allowed)
     104086 hits, 319033 misses
RxQ5 buffers, 2040 bytes (total 128, permanent 128):
     64 in free list (0 min, 128 max allowed)
     64 hits, 0 misses
RxQ6 buffers, 2040 bytes (total 128, permanent 128):
     0 in free list (0 min, 128 max allowed)
     270 hits, 142 misses
RxQ7 buffers, 2040 bytes (total 1200, permanent 1200):
     398 in free list (0 min, 1200 max allowed)
     255825 hits, 0 misses
RxQ8 buffers, 2040 bytes (total 64, permanent 64):
     0 in free list (0 min, 64 max allowed)
     87485 hits, 98887 misses
RxQ9 buffers, 2040 bytes (total 16, permanent 16):
     0 in free list (0 min, 16 max allowed)
     16 hits, 0 misses
RxQ10 buffers, 2040 bytes (total 64, permanent 64):
     1 in free list (0 min, 64 max allowed)
     375851 hits, 5923 fallbacks
RxQ11 buffers, 2040 bytes (total 16, permanent 16):
     0 in free list (0 min, 16 max allowed)
     23 hits, 7 misses
RxQ12 buffers, 2040 bytes (total 96, permanent 96):
     0 in free list (0 min, 96 max allowed)
     112 hits, 37 misses
RxQ13 buffers, 2040 bytes (total 16, permanent 16):
     0 in free list (0 min, 16 max allowed)
     16 hits, 0 misses
RxQ15 buffers, 2040 bytes (total 4, permanent 4):
     0 in free list (0 min, 4 max allowed)
     4870089 hits, 4870085 misses
HRPCRespFallback buffers, 1500 bytes (total 80, permanent 80):
     80 in free list (0 min, 80 max allowed)
     0 hits, 0 misses
RxQFB buffers, 2040 bytes (total 904, permanent 904):
     897 in free list (0 min, 904 max allowed)
     82590 hits, 0 misses
RxQ0 buffers, 2040 bytes (total 1200, permanent 1200):
     669 in free list (0 min, 1200 max allowed)
     4222470 hits, 0 misses
IPC buffers, 2048 bytes (total 300, permanent 300):
     285 in free list (150 min, 500 max allowed)
     67239 hits, 0 fallbacks, 0 trims, 0 created
     0 failures (0 no memory)
Jumbo buffers, 9240 bytes (total 200, permanent 200):
     200 in free list (0 min, 200 max allowed)
     0 hits, 0 misses
IPC Medium buffers, 16384 bytes (total 2, permanent 2):
     2 in free list (1 min, 8 max allowed)
     0 hits, 0 fallbacks, 0 trims, 0 created
     0 failures (0 no memory)
IPC Large buffers, 65535 bytes (total 2, permanent 2, peak 17 @ 2d21h):
     2 in free list (1 min, 8 max allowed)
     0 hits, 0 misses, 1 trims, 1 created
     0 failures (0 no memory)

Header pools:

Thanks!

0 Helpful

Ryan Fisher
Level 1
Level 1
In response to Georg Pauwen

‎10-22-2018 02:02 PM

Hello again.  I have now downgraded the ios version to 12.2.55(SE12) with no improvement.  Could this be an actual hardware problem on these switches?  I find that awfully hard to believe, really.  I just can't think of any other reason why I can't get more than 200mb on this switch.

 

Thanks

0 Helpful

Georg Pauwen
VIP
VIP
In response to Ryan Fisher

‎10-22-2018 02:12 PM

Hello,

 

post the output of:

 

sh mls qos inter GigabitEthernet1/0/48 stat

 

(make sure you have 'mls qos' enabled globally first). 

 

Also, you could try to increase your buffers:

drcore01-3750x(config)#buffers small permanent 150
drcore01-3750x(config)#buffers small min-free 60
drcore01-3750x(config)#buffers small max-free 300
drcore01-3750x(config)#buffers middle permanent 100
drcore01-3750x(config)#buffers middle min-free 30
drcore01-3750x(config)#buffers middle max-free 300
drcore01-3750x(config)#buffers big permanent 150
drcore01-3750x(config)#buffers big min-free 30
drcore01-3750x(config)#buffers big max-free 300
drcore01-3750x(config)#buffers verybig permanent 60
drcore01-3750x(config)#buffers verybig min-free 30
drcore01-3750x(config)#buffers verybig max-free 75
drcore01-3750x(config)#buffers large permanent 10
drcore01-3750x(config)#buffers large min-free 4
drcore01-3750x(config)#buffers large max-free 10
drcore01-3750x(config)#buffers huge permanent 10
drcore01-3750x(config)#buffers huge min-free 4
drcore01-3750x(config)#buffers huge max-free 10

0 Helpful

Ryan Fisher
Level 1
Level 1
In response to Georg Pauwen

‎10-22-2018 02:21 PM

Thanks.  Here's the output for that, but I don't have mls qos enabled.  I would've thought that it would've returned something else when you do a sh mls and it's not enabled.  I did have the command in the config:

 

no mls qos rewrite ip dscp

 

But wouldn't think that would be the same thing as mls qos.  I did enable mls qos and ran the show command again, and it didn't produce anything different.

 

drcore01-3750x#sh mls qos inter GigabitEthernet1/0/48 stat
GigabitEthernet1/0/48 (All statistics are in packets)

  dscp: incoming  
-------------------------------

  0 -  4 :    52873883            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         4989  
 25 - 29 :           0           94            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         2857            0         4549            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 :    37598978            0            7            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        25697  
 25 - 29 :           0          424            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         3025            0         1021            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 :    52885582            0            0         4747            0  
  5 -  7 :           0         3211        14489  
  cos: outgoing 
-------------------------------

  0 -  4 :    37628228            0            0            0            0  
  5 -  7 :           0          988          479  
  output queues enqueued: 
 queue:    threshold1   threshold2   threshold3
-----------------------------------------------
 queue 0:           2           0           0 
 queue 1:      224855        2810        1478 
 queue 2:           0           0           0 
 queue 3:           0           0    37460763 

  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

I'll post my config as well.  Thanks!

0 Helpful

Georg Pauwen
VIP
VIP
In response to Ryan Fisher

‎10-22-2018 02:34 PM

Hello,

 

based on your output, you could try and change the queue buffers on your interface. I have come up with the values below:

 

interface GigabitEthernet1/0/48
mls qos queue-set output 1 buffers 0 10 0 90
srr-queue bandwidth share 1 10 1 80

0 Helpful

Ryan Fisher
Level 1
Level 1
In response to Georg Pauwen

‎10-22-2018 02:38 PM

thanks.  i added those settings to it and we'll see what happens.  I'll let you know.

0 Helpful

Ryan Fisher
Level 1
Level 1
In response to Georg Pauwen

‎10-23-2018 11:50 AM

Interesting thing I just noticed, the config on that port isn't taking this command that was suggested by Georg:

mls qos queue-set output 1 buffers 0 10 0 90

When I input it on that interface, it returns and doesn't say anything like it took the setting, but if you go and look at the port config it's not there?

interface GigabitEthernet1/0/48
description cox 1gb metroE net
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,15,501,521,920,980
switchport mode trunk
srr-queue bandwidth share 1 10 1 80
end

mls qos is enabled in the config, I have confirmed. Any idea why that's not taking?

Thanks
0 Helpful

Ryan Fisher
Level 1
Level 1
In response to Georg Pauwen

‎10-22-2018 02:30 PM

Here's my config if that helps

 

drcore01-3750x#sh run
Building configuration...

Current configuration : 14817 bytes

version 12.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname drcore01-3750x
!
boot-start-marker
boot-end-marker
!

!

!
!
aaa new-model
!
!
!
!
!
aaa session-id common
clock timezone PST -8
clock summer-time PDT recurring
switch 1 provision ws-c3750x-48
switch 2 provision ws-c3750x-48
system mtu routing 1500
authentication mac-move permit
ip routing
!
!
vtp mode transparent
!
no mls qos rewrite ip dscp
mls qos
!
crypto pki trustpoint TP-self-signed-
 enrollment selfsigned
 subject-name cn=IOS-Self-Signed-Certificate-
 revocation-check none
 rsakeypair TP-self-signed-
!
!

  quit
spanning-tree mode pvst
spanning-tree extend system-id
!
!
!
errdisable recovery cause loopback
!
vlan internal allocation policy ascending
!
vlan 100
 name client_net
!
vlan 101
 name admin_client_net
!
vlan 110
 name voip_server_net
!
vlan 195
 name iscsi_net
!
vlan 200 
!
vlan 205
 name dr_server_net
!
vlan 501
 name hsrp_prod_server_net
!
vlan 521
 name hsrp_prod_mgmt_net
!
vlan 920
 name hsrp_prod_esi_net
!
vlan 980
 name mpls_wan_net
!
vlan 999
 name mgmt_net
!
!
!
!
interface Port-channel11
 description 
 switchport trunk encapsulation dot1q
 switchport mode trunk
!
interface Port-channel12
 description 
 switchport trunk encapsulation dot1q
 switchport mode trunk
!
interface Port-channel13
 description 
 switchport trunk encapsulation dot1q
 switchport mode trunk
!
interface Port-channel14
 description 
 switchport trunk encapsulation dot1q
 switchport mode trunk
!
interface FastEthernet0
 no ip address
 no ip route-cache cef
 no ip route-cache
 no ip mroute-cache
 shutdown
!
interface GigabitEthernet1/0/1
 switchport access vlan 195
!
interface GigabitEthernet1/0/2
 switchport access vlan 195
!
interface GigabitEthernet1/0/3
 switchport access vlan 195
!
interface GigabitEthernet1/0/4
 switchport access vlan 195
!
interface GigabitEthernet1/0/5
 switchport access vlan 195
!
interface GigabitEthernet1/0/6
 switchport access vlan 195
!
interface GigabitEthernet1/0/7
 switchport access vlan 200
!
interface GigabitEthernet1/0/8
 switchport access vlan 200
!
interface GigabitEthernet1/0/9
 switchport access vlan 200
!
interface GigabitEthernet1/0/10
 switchport access vlan 200
!
interface GigabitEthernet1/0/11
 switchport access vlan 200
!
interface GigabitEthernet1/0/12
 switchport access vlan 200
!
interface GigabitEthernet1/0/13
 switchport access vlan 205
!
interface GigabitEthernet1/0/14
 switchport access vlan 205
!
interface GigabitEthernet1/0/15
 switchport access vlan 110
 shutdown
!
interface GigabitEthernet1/0/16
 switchport access vlan 205
!
interface GigabitEthernet1/0/17
 switchport access vlan 205
!
interface GigabitEthernet1/0/18
 switchport access vlan 205
!
interface GigabitEthernet1/0/19
 switchport access vlan 205
!
interface GigabitEthernet1/0/20
 switchport access vlan 110
 speed 100
 duplex full
!
interface GigabitEthernet1/0/21
 description dresx05 vmnic0
 switchport trunk encapsulation dot1q
 switchport mode trunk
!
interface GigabitEthernet1/0/22
 switchport access vlan 999
!
interface GigabitEthernet1/0/23
 switchport access vlan 999
!
interface GigabitEthernet1/0/24
 switchport access vlan 999
!
interface GigabitEthernet1/0/25
 switchport access vlan 999
!
interface GigabitEthernet1/0/26
 switchport access vlan 195
!
interface GigabitEthernet1/0/27
 switchport access vlan 195
!
interface GigabitEthernet1/0/28
 switchport access vlan 195
!
interface GigabitEthernet1/0/29
 description po11 to 
 switchport trunk encapsulation dot1q
 switchport mode trunk
 channel-protocol lacp
 channel-group 11 mode active
!
interface GigabitEthernet1/0/30
 description po11 to 
 switchport trunk encapsulation dot1q
 switchport mode trunk
 channel-protocol lacp
 channel-group 11 mode active
!
interface GigabitEthernet1/0/31
 description po12 to 
 switchport trunk encapsulation dot1q
 switchport mode trunk
 channel-protocol lacp
 channel-group 12 mode active
!
interface GigabitEthernet1/0/32
 description po12 to 
 switchport trunk encapsulation dot1q
 switchport mode trunk
 channel-protocol lacp
 channel-group 12 mode active
!
interface GigabitEthernet1/0/33
 switchport access vlan 999
!
interface GigabitEthernet1/0/34
 switchport access vlan 999
!
interface GigabitEthernet1/0/35
 switchport access vlan 999
!
interface GigabitEthernet1/0/36
 switchport access vlan 999
!
interface GigabitEthernet1/0/37
 switchport access vlan 999
!
interface GigabitEthernet1/0/38
 switchport access vlan 999
!
interface GigabitEthernet1/0/39
 switchport access vlan 999
!
interface GigabitEthernet1/0/40
 switchport access vlan 999
!
interface GigabitEthernet1/0/41
 switchport access vlan 999
!
interface GigabitEthernet1/0/42
 switchport access vlan 999
!
interface GigabitEthernet1/0/43
 switchport access vlan 999
!
interface GigabitEthernet1/0/44
 switchport access vlan 999
!
interface GigabitEthernet1/0/45
 no switchport
 ip address 10.100.193.1 255.255.255.248
!
interface GigabitEthernet1/0/46
 description cogent 100mb pt2pt 
 no switchport
 ip address 10.253.221.2 255.255.255.252
 speed 100
 duplex full
!
interface GigabitEthernet1/0/47
 description to dr01-5510asa fa0/0
 no switchport
 ip address 10.100.194.1 255.255.255.252
 speed 100
 duplex full
!
interface GigabitEthernet1/0/48
 description cox 1gb metroE
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 1,15,501,521,920,980
 switchport mode trunk
!
interface GigabitEthernet1/1/1
!
interface GigabitEthernet1/1/2
!
interface GigabitEthernet1/1/3
!
interface GigabitEthernet1/1/4
!
interface TenGigabitEthernet1/1/1
 description cox 2gb metroE 
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 1,15,501,521,920,980
 switchport mode trunk
 shutdown 
!
interface TenGigabitEthernet1/1/2
!
interface GigabitEthernet2/0/1
 switchport access vlan 195
!
interface GigabitEthernet2/0/2
 switchport access vlan 195
!
interface GigabitEthernet2/0/3
 switchport access vlan 195
!
interface GigabitEthernet2/0/4
 switchport access vlan 195
!
interface GigabitEthernet2/0/5
 switchport access vlan 195
!
interface GigabitEthernet2/0/6
 switchport access vlan 195
!
interface GigabitEthernet2/0/7
 switchport access vlan 200
!
interface GigabitEthernet2/0/8
 switchport access vlan 200
!
interface GigabitEthernet2/0/9
 switchport access vlan 200
!
interface GigabitEthernet2/0/10
 switchport access vlan 200
!
interface GigabitEthernet2/0/11
 switchport access vlan 200
!
interface GigabitEthernet2/0/12
 switchport access vlan 200
!
interface GigabitEthernet2/0/13
 description 
 switchport access vlan 205
 shutdown
!
interface GigabitEthernet2/0/14
 switchport access vlan 205
!
interface GigabitEthernet2/0/15
 switchport access vlan 110
!
interface GigabitEthernet2/0/16
 switchport access vlan 205
!
interface GigabitEthernet2/0/17
 switchport access vlan 205
!
interface GigabitEthernet2/0/18
 switchport access vlan 205
!
interface GigabitEthernet2/0/19
 switchport access vlan 205
!
interface GigabitEthernet2/0/20
 switchport access vlan 205
!
interface GigabitEthernet2/0/21
 description dresx05 vmnic1
 switchport trunk encapsulation dot1q
 switchport mode trunk
!
interface GigabitEthernet2/0/22
 switchport access vlan 999
!
interface GigabitEthernet2/0/23
 switchport access vlan 999
!
interface GigabitEthernet2/0/24
 switchport access vlan 999
!
interface GigabitEthernet2/0/25
 switchport access vlan 999
!
interface GigabitEthernet2/0/26
 switchport access vlan 195
!
interface GigabitEthernet2/0/27
 switchport access vlan 195
!
interface GigabitEthernet2/0/28
 switchport access vlan 195
!
interface GigabitEthernet2/0/29
 description 
 switchport trunk encapsulation dot1q
 switchport mode trunk
 channel-protocol lacp
 channel-group 13 mode active
!
interface GigabitEthernet2/0/30
 description 
 switchport trunk encapsulation dot1q
 switchport mode trunk
 channel-protocol lacp
 channel-group 13 mode active
!
interface GigabitEthernet2/0/31
 description 
 switchport trunk encapsulation dot1q
 switchport mode trunk
 channel-protocol lacp
 channel-group 14 mode active
!
interface GigabitEthernet2/0/32
 description 
 switchport trunk encapsulation dot1q
 switchport mode trunk
 channel-protocol lacp
 channel-group 14 mode active
!
interface GigabitEthernet2/0/33
 switchport access vlan 999
!
interface GigabitEthernet2/0/34
 switchport access vlan 999
!
interface GigabitEthernet2/0/35
 switchport access vlan 999
!
interface GigabitEthernet2/0/36
 switchport access vlan 999
!
interface GigabitEthernet2/0/37
 switchport access vlan 999
!
interface GigabitEthernet2/0/38
 switchport access vlan 999
!
interface GigabitEthernet2/0/39
 switchport access vlan 999
!
interface GigabitEthernet2/0/40
 switchport access vlan 999
!
interface GigabitEthernet2/0/41
 switchport access vlan 999
!
interface GigabitEthernet2/0/42
 switchport access vlan 999
!
interface GigabitEthernet2/0/43
 switchport access vlan 999
!         
interface GigabitEthernet2/0/44
 switchport access vlan 999
!
interface GigabitEthernet2/0/45
 switchport access vlan 999
!
interface GigabitEthernet2/0/46
 switchport access vlan 999
!
interface GigabitEthernet2/0/47
 switchport access vlan 999
!
interface GigabitEthernet2/0/48
 switchport access vlan 999
!
interface GigabitEthernet2/1/1
!
interface GigabitEthernet2/1/2
!
interface GigabitEthernet2/1/3
!
interface GigabitEthernet2/1/4
!
interface TenGigabitEthernet2/1/1
!
interface TenGigabitEthernet2/1/2
!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan15
 ip address 10.200.145.3 255.255.255.0
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 no ip mroute-cache
 shutdown
 standby 0 ip 10.200.145.1
 standby 0 priority 85
 standby 0 authentication 
!
interface Vlan100
 description 
 ip address 10.100.80.1 255.255.252.0
 no ip redirects
 no ip unreachables
 no ip proxy-arp
!
interface Vlan101
 description 
 ip address 10.100.85.1 255.255.255.0
 no ip redirects
 no ip unreachables
 no ip proxy-arp
!
interface Vlan110
 description 
 ip address 10.100.10.1 255.255.255.0
 no ip redirects
 no ip unreachables
 no ip proxy-arp
!
interface Vlan195
 description 
 ip address 10.100.195.1 255.255.255.0
 no ip redirects
 no ip unreachables
 no ip proxy-arp
!
interface Vlan205
 description dr server net
 ip address 10.100.205.1 255.255.255.0
 no ip redirects
 no ip unreachables
 no ip proxy-arp
!
interface Vlan501
 description 
 ip address 10.200.1.3 255.255.255.0
 no ip unreachables
 no ip proxy-arp
 no ip mroute-cache
 shutdown
 standby 0 ip 10.200.1.1
 standby 0 priority 85
 standby 0 authentication 
!         
interface Vlan521
 description
 ip address 10.202.1.3 255.255.255.0
 no ip unreachables
 no ip proxy-arp
 no ip mroute-cache
 shutdown
 standby 0 ip 10.202.1.1
 standby 0 priority 85
 standby 0 authentication 
!
interface Vlan920

 ip address 10.92.1.3 255.255.255.0
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 no ip mroute-cache
 shutdown
 standby 0 ip 10.92.1.1
 standby 0 priority 85
 standby 0 
!
interface Vlan980
 description cox 1gb metroE 
 ip address 10.253.220.3 255.255.255.224
!
interface Vlan999
 description management net
 ip address 10.100.199.1 255.255.255.0
 no ip redirects
 no ip unreachables
 no ip proxy-arp
!
!
router eigrp 100
 network 10.0.0.0
 network 10.100.193.1 0.0.0.0
 passive-interface default
 no passive-interface Vlan980
 no passive-interface GigabitEthernet1/0/46
 no passive-interface GigabitEthernet1/0/47
 no passive-interface GigabitEthernet1/0/48
 no passive-interface TenGigabitEthernet1/1/1
 no passive-interface GigabitEthernet1/0/45
!
ip classless
ip route 0.0.0.0 0.0.0.0 10.100.194.2
ip route 10.254.100.0 255.255.255.0 10.100.194.2
ip route 172.16.20.0 255.255.255.0 10.201.1.1
ip route xxx 255.255.255.255 10.253.220.1
!
no ip http server
no ip http secure-server
!
ip sla enable reaction-alerts
logging trap debugging
logging 10.200.1.93
logging 10.200.1.135
!
snmp-server community 
snmp-server location 
snmp-server contact admin 
!
vstack
!
line con 0
 exec-timeout 0 0
line vty 0 3
 session-timeout 120  output
 exec-timeout 0 0
 privilege level 15
 length 0
 transport input all
 transport output all
line vty 4
 session-timeout 120  output
 exec-timeout 5 0
 privilege level 15
 length 0
 transport input all
 transport output all
line vty 5 15
 session-timeout 120  output
 exec-timeout 5 0
 privilege level 15
 length 0
 transport input all
 transport output all
!
ntp authentication-key 10 md5 
ntp authenticate
ntp trusted-key 10
ntp clock-period 36027602
ntp server 10.200.199.1
end
0 Helpful

Joseph W. Doherty
Hall of Fame
Hall of Fame

‎10-22-2018 03:58 PM - edited ‎10-22-2018 04:01 PM

The 3560/3750 series are somewhat infamous for having insufficient buffer RAM for traffic bursts (and also having a default QoS configuration that locks up what buffer RAM they do have for interface QoS queues).

The "usual" interface drop counter doesn't always record ASIC queue drops. For the command that does (noted by another poster) you want to check the enqueued stats and drop stats. Those that you posted do show packets being enqueued, but not dropped. I.e.:

drcore01-3750x#sh mls qos inter GigabitEthernet1/0/48 stat
GigabitEthernet1/0/48 (All statistics are in packets)

.
.

output queues enqueued:
queue: threshold1 threshold2 threshold3
-----------------------------------------------
queue 0: 2 0 0
queue 1: 224855 2810 1478
queue 2: 0 0 0
queue 3: 0 0 37460763

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

 

The above shows the port does queue packets, but surprisingly, no drops.(?)

0 Helpful

Ryan Fisher
Level 1
Level 1
In response to Joseph W. Doherty

‎10-22-2018 04:11 PM

So does that mean that this switch just can't keep up with the data transfer?  I would hope not!

 

Thanks!

0 Helpful

Joseph W. Doherty
Hall of Fame
Hall of Fame
In response to Ryan Fisher

‎10-23-2018 03:19 AM

Yes and no.

If the cause of your poor performance is microbursts exceeding default hardware buffers settings, then yes, the 3K will not keep up. However, if that's the issue, tuning those buffers can sometimes make a huge improvement. To tune them, though, I believe you need to enable QoS.
0 Helpful
Customers Also Viewed These Support Documents
Review Cisco Networking products for a $25 gift card