Здравствуйте,Имеется две С6506 в качестве ядра. И несколько серверных свитчей С3750. Все порты Gigabit. Каждый С3750 смотрит 2 портами объединенными в portchannel на каждый С6506. Т.е. треугольник. В качестве spanning-tree указан rapid-pvst.
Проблема: Cisco LMS постоянно гундосит:
ALERT ID = 00002QI
TIME = Пн 09-мар-2009 14:00:33 EET
STATUS = Active
SEVERITY = Critical
MANAGED OBJECT = core1.lan
MANAGED OBJECT TYPE = Switches and Hubs
EVENT DESCRIPTION = PORT-core1.lan/1.33 [Gi1/33] [GEC to C3750_1]:HighErrorRate; PORT-core1.lan/1.41 [Gi1/41] [GEC to C3750_3]:HighErrorRate; PORT-core1.lan/1.35 [Gi1/35] [GEC to C3750_1]:HighErrorRate; core1.lan:Unresponsive;Настройки на порту:
CORE1#sh run int gi1/41
Building configuration...Current configuration : 266 bytes
!
interface GigabitEthernet1/41
description GEC to C3750_3
no ip address
load-interval 30
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,2,80,81,101-107,200-212,216,217,1001
switchport mode trunk
channel-group 4 mode on
endCORE1#sh int gi1/41
GigabitEthernet1/41 is up, line protocol is up (connected)
Hardware is C6k 1000Mb 802.3, address is 0015.c62b.ede4 (bia 0015.c62b.ede4)
Description: GEC to C3750_3
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Full-duplex, 1000Mb/s
input flow-control is off, output flow-control is off
Clock mode is auto
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:29, output 00:00:27, output hang never
Last clearing of "show interface" counters 00:37:44
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 1694000 bits/sec, 889 packets/sec
30 second output rate 1694000 bits/sec, 796 packets/sec
3693410 packets input, 2060251053 bytes, 0 no buffer
Received 1022 broadcasts, 0 runts, 957363 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
2510121 packets output, 724977899 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 outМожет ли это как-то быть связанным с большим количеством giants-пакетов?
Если да, то что подкрутить, чтоб избавиться?Спасибо.
>[оверквотинг удален]
> 0 babbles, 0 late collision, 0 deferred
>
> 0 lost carrier, 0 no carrier
> 0 output buffer failures, 0 output buffers
>swapped out
>
>Может ли это как-то быть связанным с большим количеством giants-пакетов?
>Если да, то что подкрутить, чтоб избавиться?
>
>Спасибо.http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/io...
https://www.cisco.com/en/US/products/hw/switches/ps700/produ..."Configure Native IOS
7609(config)#int gigabitEthernet 1/1
7609(config-if)#mtu 9216"
>[оверквотинг удален]
>>Если да, то что подкрутить, чтоб избавиться?
>>
>>Спасибо.
>
>http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/io...
>https://www.cisco.com/en/US/products/hw/switches/ps700/produ...
>
>"Configure Native IOS
> 7609(config)#int gigabitEthernet 1/1
> 7609(config-if)#mtu 9216"Поставил MTU 9216, но ситуация осталась прежней. Giant-пакеты продолжают составлять 15-20% трафика.
CORE1#sh int po2
Port-channel2 is up, line protocol is up (connected)
Hardware is EtherChannel, address is 0015.c62b.eddc (bia 0015.c62b.eddc)
Description: Link to C3750_1
MTU 9216 bytes, BW 2000000 Kbit, DLY 10 usec,
reliability 255/255, txload 2/255, rxload 7/255
Encapsulation ARPA, loopback not set
Full-duplex, 1000Mb/s
input flow-control is off, output flow-control is unsupported
Members in this channel: Gi1/33 Gi1/35
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output never, output hang never
Last clearing of "show interface" counters 00:00:58
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 56622000 bits/sec, 12635 packets/sec
30 second output rate 23279000 bits/sec, 11514 packets/sec
694582 packets input, 360065026 bytes, 0 no buffer
Received 287 broadcasts, 0 runts, 132089 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
637225 packets output, 148360237 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
с физикой точно всё ОК?
>с физикой точно всё ОК?Вроде да. СКС по проекту тестировалась. Результаты нормальные. И ведь это не на одном каком-то линке.
Port Single-Col Multi-Col Late-Col Excess-Col Carri-Sen Runts Giants
Gi1/1 0 0 0 0 0 0 64714
Gi1/2 0 0 0 0 0 0 0
Gi1/3 0 0 0 0 0 0 31852
Gi1/4 0 0 0 0 0 0 0
Gi1/5 0 0 0 0 0 0 50124
Gi1/6 0 0 0 0 0 0 0
Gi1/7 0 0 0 0 0 0 78641
Gi1/8 0 0 0 0 0 0 0
Gi1/9 0 0 0 0 0 0 10717
Gi1/10 0 0 0 0 0 0 4
Gi1/11 0 0 0 0 0 0 6112
Gi1/12 0 0 0 0 0 0 0
Gi1/13 0 0 0 0 0 0 118351
Gi1/14 0 0 0 0 0 0 0
Gi1/15 0 0 0 0 0 0 42705
Gi1/16 0 0 0 0 0 0 0
Gi1/17 0 0 0 0 0 0 85633
Gi1/18 0 0 0 0 0 0 0
Gi1/19 0 0 0 0 0 0 102583
Gi1/20 0 0 0 0 0 0 0
Gi1/21 0 0 0 0 0 0 1971
Gi1/22 0 0 0 0 0 0 0
Gi1/23 0 0 0 0 0 0 6616
Gi1/24 0 0 0 0 0 0 0
Gi1/25 0 0 0 0 0 0 204173Port Single-Col Multi-Col Late-Col Excess-Col Carri-Sen Runts Giants
Gi1/26 0 0 0 0 0 0 0
Gi1/27 0 0 0 0 0 0 86323
Gi1/28 0 0 0 0 0 0 513131
Gi1/29 0 0 0 0 0 0 45388
Gi1/30 0 0 0 0 0 0 1083
Gi1/31 0 0 0 0 0 0 0
Gi1/32 0 0 0 0 0 0 0
Gi1/33 0 0 0 0 0 0 8733433
Gi1/34 0 0 0 0 0 0 0
Gi1/35 0 0 0 0 0 0 3824081
Gi1/36 0 0 0 0 0 0 0
Gi1/37 0 0 0 0 0 0 307116
Gi1/38 0 0 0 0 0 0 0
Gi1/39 0 0 0 0 0 0 56544
Gi1/40 0 0 0 0 0 0 0
Gi1/41 0 0 0 0 0 0 210590
Gi1/42 0 0 0 0 0 0 242736
Gi1/43 0 0 0 0 0 0 157547
Gi1/44 0 0 0 0 0 0 0
Gi1/45 0 0 0 0 0 0 66618
Gi1/46 0 0 0 0 0 0 98265
Gi1/47 0 0 0 0 0 0 111311
Gi1/48 0 0 0 0 0 0 38185
Gi5/1 0 0 0 0 0 0 0
Gi5/2 0 0 0 0 0 0 0
Po1 0 0 0 0 0 0 314379
Po2 0 0 0 0 0 0 12557514
Po3 0 0 0 0 0 0 363660
Po4 0 0 0 0 0 0 368137
Po5 0 0 0 0 0 0 514214На всех портах которые скоммутированы в пользовательские (С2950) и серверные (С3750) свитчи. Порты с маршрутизаторами или серверами без giant(практически все четные).
>На всех портах которые скоммутированы в пользовательские (С2950) и серверные (С3750) свитчи.
>Порты с маршрутизаторами или серверами без giant(практически все четные).tak nikto ne skazal shto oni ischeznut - esli u tebja est kakoj to protokol kotoryj ih generiruet - oni ne ischeznut. delo v tom - shto doljnyj otrabatyjvatsja normalno ...
esli hochesh znat pochemu oni pojavljautsja to sdelaj monitoring na port i posmotri wiresharkom shto tam vnutri :)
Ex: QinQ pass-through (802.1q inside 802.1q, useful for ISPs to segregate customer traffic)- 1526 bytes
MPLS VPN pass-through (two 4-byte labels)- 1526
UTI/L2TPV3 pass-through (encapsulate one Ethernet packet in another Ethernet packet with a tunneling header. Useful to transport any payload such as IP/IPX and so on over an IP backbone). - 1568 bytes
ja by prismotrelas v fakte shto eto na nechetnyh portah :)ochen intersno kakie protokoly prohodjat