interaface errors

[Vuko_Drakkainen]

Witam!
Czyscilem ostatnio liczniki na 6500 i mam nastepujacy problem.

show interface pokazuje mi ponizsze dane:

xxxx#show int tenGigabitEthernet 2/1
TenGigabitEthernet2/1 is up, line protocol is up (connected)
Hardware is C6k 10000Mb 802.3, address is xxx.bd21.xxxx(bia xxx.bd21.xxx)
Description: Link do xxxxx
MTU 9216 bytes, BW 10000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 10Gb/s, media type is 10Gbase-SR
input flow-control is on, output flow-control is off
Clock mode is auto
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:15, output 00:00:45, output hang never
Last clearing of "show interface" counters 17:11:27
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 1000 bits/sec, 1 packets/sec
L2 Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes
L3 in Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes mcast
L3 out Switched: ucast: 0 pkt, 0 bytes mcast: 0 pkt, 0 bytes
4346 packets input, 1035004 bytes, 0 no buffer
Received 4346 broadcasts (4293 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
77028 packets output, 9953175 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


a show interfaces tenGigabitEthernet 2/1 counters errors ponizsze


xxx#show interfaces tenGigabitEthernet 2/1 counters errors

Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize OutDiscards
Te2/1 0 39919 0 78441 0 0

Port Single-Col Multi-Col Late-Col Excess-Col Carri-Sen Runts Giants
Te2/1 0 0 0 0 0 2 6960

Port SQETest-Err Deferred-Tx IntMacTx-Err IntMacRx-Err Symbol-Err
Te2/1 0 0 0 0 10811


stad pytanie, dlaczego pomimo wyczszczenia licznikow errory sa jeszcze widoczne?