[c-nsp] Underrun/runt issue on trunk interface between 2 switchs

[Brad Clausen]

Hey Guys,

I am having a weird issue between 2 switchs that I hope someone can help out
with.


One end of the trunk is a cisco WS-C3548-XL running 12.0(5.3)WC(1) code

The other end is a ProCurve J9086A Switch 2610-24/12PWR  software Version:
R.11.25


On the Procurve end I see absolutely nothing in the way of errors. But on
the Cisco end I see an excessive amount of runts as per the following:

sho int fastEthernet 0/1
FastEthernet0/1 is up, line protocol is up
  Hardware is Fast Ethernet, address is 0008.2117.b141 (bia 0008.2117.b141)
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 250/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive not set
  Full-duplex, 100Mb/s, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:23, output 00:00:00, output hang never
  Last clearing of "show interface" counters 01:31:18
  Queueing strategy: fifo
  Output queue 0/40, 0 drops; input queue 0/75, 0 drops
  5 minute input rate 5000 bits/sec, 4 packets/sec
  5 minute output rate 7000 bits/sec, 7 packets/sec
     31492 packets input, 5362556 bytes
     Received 14259 broadcasts, 3929 runts, 0 giants, 0 throttles
     3929 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 2081 multicast
     0 input packets with dribble condition detected
     41094 packets output, 6605873 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 output buffer failures, 0 output buffers swapped out


Relevent config for each port is very basic as per the following:

Cisco:

interface FastEthernet0/1
 duplex full
 speed 100
 switchport trunk encapsulation dot1q
 switchport mode trunk
end


HP Procurve:

interface 24
   speed-duplex 100-full

vlan 10
   name "X-VLAN"
   untagged 13-21,27-28
   ip address 10.16.52.245 255.255.255.0
   tagged 1-5,22-26
   exit

I've tried changing the cable between the 2 switchs as well as changing the
port on both ends. This didn't make any changes. I then decided to change it
from a trunk to an access port on both sides.. When I did this I again saw
no errors on the Procurve end of the link. However I then started to see
overruns on the Cisco switch as per the following:



Hardware is Fast Ethernet, address is 0008.2117.b155 (bia 0008.2117.b155)
  MTU 1500 bytes, BW 0 Kbit, DLY 0 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive not set
  Full-duplex, 100Mb/s, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:02:32, output 00:02:04, output hang never
  Last clearing of "show interface" counters 00:07:56
  Queueing strategy: fifo
  Output queue 0/40, 0 drops; input queue 0/75, 0 drops
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     1342 packets input, 166570 bytes
     Received 711 broadcasts, 0 runts, 0 giants, 0 throttles
     9 input errors, 9 CRC, 0 frame, 9 overrun, 9 ignored
     0 watchdog, 118 multicast
     0 input packets with dribble condition detected
     990 packets output, 168402 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 output buffer failures, 0 output buffers swapped out

This isn't occuring on any other interface on the Cisco switch. Also, it is
not occuring on any other switch connecting of the Procurve switch either.

Does anyone have any ideas what coulld be causing this?

Also worth nothing the input counts above are over only 20 or so minutes.
The counters were cleared prior.