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Калькуляторы

QNET и Cisco

Есть два коммутатора Cisco 3560.

Соединены по соточному медному порту.

Состояние ошибок на порту

 

SW1#sh int fa0/16 counters errors

 

Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize OutDiscards

Fa0/16 0 0 0 0 0 3572597656

 

Port Single-Col Multi-Col Late-Col Excess-Col Carri-Sen Runts Giants

Fa0/16 0 0 0 0 0 0 0

 

SW2#sh int fa0/1 counters errors

 

Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize OutDiscards

Fa0/1 0 0 0 0 0 0

 

Port Single-Col Multi-Col Late-Col Excess-Col Carri-Sen Runts Giants

Fa0/1 0 0 0 0 0 0 0

 

Во второй коммутатор подключены сервера с ПО QNET

Потерь пакетов нет. Порты работают на 100Мбит дуплекс. Пинг не теряется.

На портах серверов тоже ничего криминального.

А вот приложения QNET регулярно отваливаются на 3-5 секунд.

 

Вот еще с первого коммутатора.

 

SW1#sh mls qos

QoS is disabled

 

FastEthernet0/16 is up, line protocol is up (connected)

Hardware is Fast Ethernet, address is 0026.989c.cc92 (bia 0026.989c.cc92)

Description: XXXXXX

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)

Full-duplex, 100Mb/s, media type is 10/100BaseTX

input flow-control is off, output flow-control is unsupported

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 never

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 3572597656

Queueing strategy: fifo

Output queue: 0/40 (size/max)

5 minute input rate 14000 bits/sec, 24 packets/sec

5 minute output rate 728000 bits/sec, 1159 packets/sec

1142655771 packets input, 317509875218 bytes, 0 no buffer

Received 25771462 broadcasts (8121381 multicasts)

0 runts, 0 giants, 0 throttles

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

0 watchdog, 8121381 multicast, 0 pause input

0 input packets with dribble condition detected

18991950750 packets output, 1533769445730 bytes, 0 underruns

0 output errors, 0 collisions, 1 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

 

Transmit FastEthernet0/16 Receive

466141684 Bytes 3977262970 Bytes

2028296657 Unicast frames 1116884314 Unicast frames

862864970 Multicast frames 8121381 Multicast frames

3215887490 Broadcast frames 17650081 Broadcast frames

0 Too old frames 383389970 Unicast bytes

0 Deferred frames 1005355007 Multicast bytes

0 MTU exceeded frames 2723337795 Broadcast bytes

0 1 collision frames 0 Alignment errors

0 2 collision frames 0 FCS errors

0 3 collision frames 0 Oversize frames

0 4 collision frames 0 Undersize frames

0 5 collision frames 0 Collision fragments

0 6 collision frames

0 7 collision frames 13745742 Minimum size frames

0 8 collision frames 882959464 65 to 127 byte frames

0 9 collision frames 64430057 128 to 255 byte frames

0 10 collision frames 11849453 256 to 511 byte frames

0 11 collision frames 30084862 512 to 1023 byte frames

0 12 collision frames 70050428 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 0 Symbol error frames

0 Late collisions 0 Invalid frames, too large

0 VLAN discard frames 69535770 Valid frames, too large

0 Excess defer frames 0 Invalid frames, too small

2010397259 64 byte frames 0 Valid frames, too small

3327965299 127 byte frames

520310640 255 byte frames 0 Too old frames

99917456 511 byte frames 0 Valid oversize frames

119493509 1023 byte frames 0 System FCS error frames

18514274 1518 byte frames 0 RxPortFifoFull drop frame

10450680 Too large frames

0 Good (1 coll) frames

0 Good (>1 coll) frames

 

 

SW1#sh platform port-asic stats drop fa0/16

 

Interface Fa0/16 TxQueue Drop Statistics

Queue 0

Weight 0 Frames 0

Weight 1 Frames 0

Weight 2 Frames 0

Queue 1

Weight 0 Frames 0

Weight 1 Frames 0

Weight 2 Frames 0

Queue 2

Weight 0 Frames 0

Weight 1 Frames 0

Weight 2 Frames 0

Queue 3

Weight 0 Frames 0

Weight 1 Frames 0

Weight 2 Frames 3572597656

 

 

Боремся с загадкой толи сервера глючат то ли коммутатор.

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наблюдали проблему у клиента, почему-то на пакетах с сервера стоял запрет на дефрагментацию, в результате часть терялась...

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OutDiscards были?

странная ошибка. на линке траффика максимум 1 мбит все время.

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при чем тут объем трафика, если пакеты не передавались тупо? 1500 ограничение, а сервак 1700, например, слал.

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