cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
1661
Views
0
Helpful
2
Replies

3750X output drop

burak-isiksoy
Level 1
Level 1

Hi All,

I have a 3750X stack with 2 members running 15.0(1)SE3

Strange thing is I am getting discard errors on some of the second member switch ports.

Problem is this ports is used for just management connections and there is almost no utilization.

And it gets weirder when I issue sh inter gx/x/x continuously i get same counts for total drop even if i clear the counters

956 or 0

I tried shutting down the interfaces rebooting the member.

Any ideas what could it be ?

here is some output about;

interface GigabitEthernet2/0/40

description HP_ILO

switchport access vlan 110

switchport mode access

end

Filanco-3750x#sh int Gi2/0/40

GigabitEthernet2/0/40 is up, line protocol is up (connected)

  Hardware is Gigabit Ethernet, address is e4d3.f10c.8aa8 (bia e4d3.f10c.8aa8)

  Description: HP_ILO

  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 100Mb/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 never, output 00:00:38, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 956

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 1000 bits/sec, 1 packets/sec

     7899 packets input, 6109595 bytes, 0 no buffer

     Received 12 broadcasts (0 multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 0 multicast, 0 pause input

     0 input packets with dribble condition detected

     4435172 packets output, 379348718 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

Filanco-3750x#

BR

Burak

1 Accepted Solution

Accepted Solutions

sgouldbo
Level 1
Level 1

You might be hitting bug:

CSCtq86186 (Catalyst 3750-X and 3750-E switches)

In a switch stack, the show interface command shows incorrect values for output drops.

The workaround is to use the show platform port-asic stats drops command to see the correct values.

This is fixed in IOS 15.0(2)SE and later.

Hope this helps.

View solution in original post

2 Replies 2

sgouldbo
Level 1
Level 1

You might be hitting bug:

CSCtq86186 (Catalyst 3750-X and 3750-E switches)

In a switch stack, the show interface command shows incorrect values for output drops.

The workaround is to use the show platform port-asic stats drops command to see the correct values.

This is fixed in IOS 15.0(2)SE and later.

Hope this helps.

hi,

this is exactly what it is. thanks for the help.

BR

Burak

Review Cisco Networking for a $25 gift card