what does mean System FCS error frames?

HANOH CHA · ‎12-11-2012

I have a C2960G that is some issue.

This problem is ping success DA(GOOGLE),also it doesnt open same web site for port 0/1 ~ 0/4.

other port successed ping and web site that just changed port.

what does reason this problem?

I think 0/1 ~0/4 port is same ASIC that is fault.

Let me know what is problem?

     Transmit GigabitEthernet0/1              Receive
   1316853346 Bytes                       4196492763 Bytes
    319528358 Unicast frames               337351001 Unicast frames
    208877933 Multicast frames                 12929 Multicast frames
     34631197 Broadcast frames                765178 Broadcast frames
            0 Too old frames              4094646794 Unicast bytes
            2 Deferred frames                1817312 Multicast bytes
            0 MTU exceeded frames          100026768 Broadcast bytes
            3 1 collision frames                   0 Alignment errors
            0 2 collision frames                  10 FCS errors
            0 3 collision frames                   0 Oversize frames
            0 4 collision frames                   0 Undersize frames
            0 5 collision frames                   2 Collision fragments
            0 6 collision frames
            0 7 collision frames            95891476 Minimum size frames
            0 8 collision frames           116359585 65 to 127 byte frames
            0 9 collision frames            59470400 128 to 255 byte frames
            0 10 collision frames           28961467 256 to 511 byte frames
            0 11 collision frames           14288550 512 to 1023 byte frames
            0 12 collision frames           23157642 1024 to 1518 byte frames
            0 13 collision frames                  0 Overrun frames
            0 14 collision frames                  0 Pause frames
            0 15 collision frames
            0 Excessive collisions                 2 Symbol error frames
           11 Late collisions                      0 Invalid frames, too large
            0 VLAN discard frames                  0 Valid frames, too large
            0 Excess defer frames                  2 Invalid frames, too small
     98381126 64 byte frames                       0 Valid frames, too small
    200223276 127 byte frames
     39551381 255 byte frames                      0 Too old frames
    176560369 511 byte frames                      0 Valid oversize frames
     29278568 1023 byte frames               3390830 System FCS error frames
     22433608 1518 byte frames                     0 RxPortFifoFull drop frame
            0 Too large frames
            2 Good (1 coll) frames
            0 Good (>1 coll) frames

Reza Sharifi · ‎12-11-2012

Hi,

Excessive errors for certain counters usually indicate a problem. When you operate at half-duplex setting, some data link errors incrementing in Frame Check Sequence (FCS), alignment, runts, and collision counters are normal. Generally, a one percent ratio of errors to total traffic is acceptable for half-duplex connections. If the ratio of errors to input packets is greater than two or three percent, performance degradation can be noticed.

In half-duplex environments, it is possible for both the switch and the connected device to sense the wire and transmit at exactly the same time and result in a collision. Collisions can cause runts, FCS, and alignment errors due to the frame not being completely copied to the wire, which results in fragmented frames.

When you operate at full-duplex, errors in FCS, Cyclic Redundancy Checks (CRC), alignment, and runt counters must be minimal. If the link operates at full-duplex, the collision counter is not active. If the FCS, CRC, alignment, or runt counters increment, check for a duplex mismatch. Duplex mismatch is a situation where the switch operates at full-duplex and the connected device operates at half-duplex, or vice versa. The results of a duplex mismatch are extremely slow performance, intermittent connectivity, and loss of connection. Other possible causes of data link errors at full-duplex are bad cables, faulty switch ports, or NIC software/hardware issues. See the Common Port and Interface Problems section of this document for more information.

more info:

http://www.cisco.com/en/US/products/hw/switches/ps708/products_tech_note09186a008015bfd6.shtml

HTH

Leo Laohoo · ‎12-11-2012

Look at the Transmit column. You have "11" Late collisions. You have "3" 1 collision frames.

Look at the Receive column.

Yes, your Systems FCS is very high.

Run a TDR test from your 2960G.

HANOH CHA · ‎12-11-2012

now it just dont use port before i used to be usage with port 0/1 -0/4

and we already physical test.

GigabitEthernet0/1 is down, line protocol is down (notconnect)

Hardware is Gigabit Ethernet, address is aca0.162c.7c01 (bia aca0.162c.7c01)

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

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

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Auto-duplex, Auto-speed, 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 1w5d, output 00:35:25, output hang never

Last clearing of "show interface" counters 1w0d

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 0 bits/sec, 0 packets/sec

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

1653 packets input, 156708 bytes, 0 no buffer

Received 582 broadcasts (310 multicasts)

0 runts, 0 giants, 0 throttles

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

0 watchdog, 310 multicast, 0 pause input

0 input packets with dribble condition detected

11302 packets output, 2690664 bytes, 0 underruns

0 output errors, 3 collisions, 0 interface resets

0 babbles, 11 late collision, 0 deferred

0 lost carrier, 0 no carrier, 0 PAUSE output

0 output buffer failures, 0 output buffers swapped out

HANOH CHA · ‎04-01-2013

I replace the HW and than it will be ok.

at the time its problems, if you have it, you can be replacememt it.

thank you for answering.