[c-nsp] WS-X6348-RJ-45 and Output drops

[David Freedman]

Tell me, do you see drops on f1/2?

I note you didn't paste show int for this.

The reason I ask is that the drops *can* be as a result of policy (or 
lack of ability) as opposed to performance, from experience.

For instance, you have STP BPDU filtering enabled on f1/1 and f1/48
but not f1/2, do you still see the drops on f1/2? could the drops be 
filtered STP BPDUs perhaps?

Dave.


> 
> So, what causing Output drops on this card ?
> 
> Here is output of show interface:
> FastEthernet1/1 is up, line protocol is up (connected)
>   Hardware is C6k 100Mb 802.3, address is 0001.c96a.8e84 (bia 0001.c96a.8e84)
>   Description: Customer DataTech
>   MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
>      reliability 255/255, txload 31/255, rxload 65/255
>   Encapsulation ARPA, loopback not set
>   Keepalive set (10 sec)
>   Full-duplex, 100Mb/s
>   input flow-control is off, output flow-control is unsupported
>   ARP type: ARPA, ARP Timeout 04:00:00
>   Last input never, output never, output hang never
>   Last clearing of "show interface" counters 7w3d
>   Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 19674562
>   Queueing strategy: fifo
>   Output queue: 0/40 (size/max)
>   30 second input rate 25559000 bits/sec, 10902 packets/sec
>   30 second output rate 12205000 bits/sec, 13481 packets/sec
>      24149904901 packets input, 10099290976969 bytes, 0 no buffer
>      Received 7617 broadcasts (7617 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
>      29324673054 packets output, 3831810881262 bytes, 0 underruns
>      0 output errors, 0 collisions, 0 interface resets
>      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
> 
> FastEthernet1/48 is up, line protocol is up (connected)
>   Hardware is C6k 100Mb 802.3, address is 0001.c96a.8e86 (bia 0001.c96a.8e86)
>   Description: sw3
>   MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
>      reliability 255/255, txload 105/255, rxload 51/255
>   Encapsulation ARPA, loopback not set
>   Keepalive set (10 sec)
>   Full-duplex, 100Mb/s
>   input flow-control is off, output flow-control is unsupported
>   ARP type: ARPA, ARP Timeout 04:00:00
>   Last input never, output never, output hang never
>   Last clearing of "show interface" counters 7w3d
>   Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 2032436
>   Queueing strategy: fifo
>   Output queue: 0/40 (size/max)
>   30 second input rate 20003000 bits/sec, 6993 packets/sec
>   30 second output rate 41324000 bits/sec, 7807 packets/sec
>      25171862715 packets input, 9131681778867 bytes, 0 no buffer
>      Received 493121 broadcasts (160311 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
>      28744492098 packets output, 19704727289126 bytes, 0 underruns
>      0 output errors, 0 collisions, 0 interface resets
>      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
> 
> interface FastEthernet1/1
>  description Customer DataTech
>  switchport
>  switchport access vlan 604
>  switchport mode access
>  no ip address
>  logging event link-status
>  load-interval 30
>  no cdp enable
>  spanning-tree portfast
>  spanning-tree bpdufilter enable
> !
> interface FastEthernet1/2
>  description MGMT SDH
>  switchport
>  switchport access vlan 2150
>  switchport mode access
>  no ip address
>  logging event link-status
>  load-interval 30
>  speed 10
>  no cdp enable
>  spanning-tree portfast
> !
> ...
> interface FastEthernet1/48
>  description sw3
>  switchport
>  switchport trunk encapsulation dot1q
>  switchport trunk allowed vlan 136,338,622,1810
>  switchport mode trunk
>  switchport nonegotiate
>  no ip address
>  logging event link-status
>  logging event bundle-status
>  logging event trunk-status
>  load-interval 30
>  speed 100
>  duplex full
>  no cdp enable
>  spanning-tree portfast trunk
>  spanning-tree bpdufilter enable
> !
> 
> Thanks,
> Robert
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