00329 FFI: port 45-Excessive CRC/alignment errors.

[allanc16]

Hello,

I am getting this error every day on port 45 of this J9050A switch. This ports hosts 2 vlans (v100 and v200)

Here is some of the configuration:

interface 45

name "Connect to 2800_router on gig 0/0/0 " 

lacp Active 

exit

vlan 1  
  name "DEFAULT_VLAN" 
  untagged 45-A4  
  ip address dhcp-bootp 
  no untagged 1-44  
  exit  
vlan 100  
  name "VLAN100"  
  untagged 1-44  
  ip address 192.168.248.131 255.255.255.128  
  tagged 45  
  exit  
vlan 200  
  name "VLAN200"  
  ip address 15.149.186.67 255.255.255.240  
  tagged 45  
  exit 

J9050A_switch# sh int 45

 Status and Counters - Port Counters for port 45

  Name  : Connect to 2800_router on gig 0/0/0
  MAC Address      : 002347-b42293
  Link Status      : Up
  Totals (Since boot or last clear) :
   Bytes Rx        : 3,522,125,277      Bytes Tx        : 686,038,579
   Unicast Rx      : 302,848,958        Unicast Tx      : 376,403,917
   Bcast/Mcast Rx  : 1,055,864          Bcast/Mcast Tx  : 47,064,683
  Errors (Since boot or last clear) :
   FCS Rx          : 849,944            Drops Tx        : 0
   Alignment Rx    : 0                  Collisions Tx   : 0
   Runts Rx        : 0                  Late Colln Tx   : 0
   Giants Rx       : 0                  Excessive Colln : 0
   Total Rx Errors : 849,944            Deferred Tx     : 0
  Others (Since boot or last clear) :
   Discard Rx      : 0                  Out Queue Len   : 0
   Unknown Protos  : 0
  Rates (5 minute weighted average) :
   Total Rx  (bps) : 3272992            Total Tx  (bps) : 5001920
   Unicast Rx (Pkts/sec) : 2            Unicast Tx (Pkts/sec) : 2
   B/Mcast Rx (Pkts/sec) : 0            B/Mcast Tx (Pkts/sec) : 1
   Utilization Rx  : 00.32 %            Utilization Tx  : 00.50 %

J9050A_switch# sh interface brief 45

 Status and Counters - Port Status

                  | Intrusion                           MDI   Flow  Bcast
  Port  Type      | Alert     Enabled Status Mode       Mode  Ctrl  Limit
  ----- --------- + --------- ------- ------ ---------- ----- ----- ------
  45    1000SX    | No        Yes     Up     1000FDx          off   0

Here is the 2800 router config for G0/0/0:

2800_router#sh ip int brief
Interface                  IP-Address      OK? Method Status                Protocol
GigabitEthernet0/0/0       unassigned      YES NVRAM  up                    up
GigabitEthernet0/0/0.1     unassigned      YES unset  up                    up
GigabitEthernet0/0/0.100   192.168.248.129 YES NVRAM  up                    up
GigabitEthernet0/0/0.200   15.149.186.65   YES NVRAM  up                    up

2800_router#sh int g0/0/0
GigabitEthernet0/0/0 is up, line protocol is up
  Hardware is PM-3387, address is 0025.55ca.0d45 (bia 0025.45ca.0dd3)
  Description: "connecting to J9050A_switch
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, link type is autonegotiation, media type is SX

 What could be the cause of this? Bad cable?

Thank you

[Richard Brodie_1]

Bad cable would do it, or a dodgy transceiver or patch lead, or maybe pushing the length limits. It's worth checking if you see CRC errors at the other end also.