[c-nsp] 7505<->3524 CRC issue

[Chris O'Hair]

Hello,

I am seeing an issue between a 3524 and a 7505.  The 7505 side of the
connection is not seeing any errors but the 3524's interface is
showing about 6 input errors per minute.

This combo is part of a redundant setup and the other 7505-3524 pair
is seeing the same types of errors, though the input rate to the
switch is about half and so is the number of input errors.

Is this a hardware issue?  Capacity issue?  Other?

Thanks,
Chris

7505
IOS (tm) RSP Software (RSP-JSV-M), Version 12.3(19), RELEASE SOFTWARE (fc2)

7505 fa3/0/0
FastEthernet3/0/0 is up, line protocol is up
  Hardware is cyBus FastEthernet Interface, address is 0050.a29b.fc60
(bia 0050.a29b.fc60)
  Description: to external switches (vLan trunk interface)
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 43/255, rxload 78/255
  Encapsulation 802.1Q Virtual LAN, Vlan ID  1., loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters 3d22h
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 30907000 bits/sec, 22323 packets/sec
  5 minute output rate 17182000 bits/sec, 11224 packets/sec
     1989309927 packets input, 2061920000 bytes, 0 no buffer
     Received 245076 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog
     0 input packets with dribble condition detected
     947682645 packets output, 1228149038 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

interface FastEthernet3/0/0
 no ip address
 speed 100
 full-duplex
end

[multiple subif like the following]
interface FastEthernet3/0/0.100
 encapsulation dot1Q 100
 ip address a.b.c.d 255.255.255.252
 no cdp enable
end

interface FastEthernet3/0/0.900
 description in-band switch management vLan
 encapsulation dot1Q 900
 ip address 192.168.1.2 255.255.255.0
 no cdp enable
 standby 1 ip 192.168.1.1
 standby 1 preempt
 standby 1 authentication 12345
end

3524
IOS (tm) C3500XL Software (C3500XL-C3H2S-M), Version 12.0(5)WC11,
RELEASE SOFTWARE (fc1)

3524 fa0/1
FastEthernet0/1 is up, line protocol is up
  Hardware is Fast Ethernet, address is 0006.289f.2c81 (bia 0006.289f.2c81)
  Description: To 7505
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 79/255, rxload 43/255
  Encapsulation ARPA, loopback not set
  Keepalive not set
  Full-duplex, 100Mb/s, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:00, output hang never
  Last clearing of "show interface" counters 00:34:14
  Queueing strategy: fifo
  Output queue 0/40, 0 drops; input queue 0/75, 0 drops
  5 minute input rate 16962000 bits/sec, 10986 packets/sec
  5 minute output rate 31234000 bits/sec, 22148 packets/sec
     22898256 packets input, 252912089 bytes
     Received 687 broadcasts, 0 runts, 0 giants, 0 throttles
     231 input errors, 231 CRC, 0 frame, 270 overrun, 270 ignored
     0 watchdog, 687 multicast
     0 input packets with dribble condition detected
     46728995 packets output, 4018643324 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

CPU utilization for five seconds: 40%/4%; one minute: 39%; five minutes: 39%

interface FastEthernet0/1
 description To 7505
 duplex full
 speed 100
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 998
 switchport trunk allowed vlan 1-997,1002-1005
 switchport mode trunk
 spanning-tree portfast
end