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SNR-S2950-24G странное поведение interface vlan.

Всем добрый день.

 

Есть коммутатор:

 SNR-S2950-24G Device, Compiled on Jan 18 16:40:25 2018
  sysLocation Building 57/2,Predelnaya st, Ekaterinburg, Russia
  CPU Mac f8:f0:82:10:fb:a9
  Vlan MAC f8:f0:82:10:fb:a8
  SoftWare Version 7.0.3.5(R0217.0160)
  BootRom Version 7.1.3
  HardWare Version 1.0.1
  CPLD Version N/A
  Serial No.:NGSW0110F715001586
  Copyright (C) 2018 NAG LLC


Не могу понять почему при использовании нескольких interface vlan XXX и добавлении их в транковый порт, коммутатор отображает на интерфейсах с разными вланами одинаковый трафик(или почти одинаковый). 16 влан управления, 1682 абонентский влан, 100 тестовый влан.

 

#show interface vlan 1682
Vlan1682 is up, line protocol is up, dev index is 4682
  Device flag 0x1003(UP BROADCAST MULTICAST)
  Time since last status change:0w-0d-0h-4m-40s  (280 seconds)
  IPv4 address is:
    (NULL)
  VRF Bind: Not Bind
  Hardware is EtherSVI, address is f8-f0-82-10-fb-a8
  MTU is 1500 bytes , BW is 0 Kbit
  Encapsulation ARPA, loopback not set
  5 minute input rate 10462 bits/sec, 8 packets/sec
  5 minute output rate 16627 bits/sec, 14 packets/sec
  The last 5 second input rate 23950 bits/sec, 16 packets/sec
  The last 5 second output rate 28614 bits/sec, 23 packets/sec
  Input packets statistics:
    Input queue 0/300, 0 drops
    57514825 packets input, 50381789839 bytes, 0 no buffer
    0 input errors, 0 CRC, 0 oversize, 0 undersize
     0 jabber, 0 fragments
  Output packets statistics:
    56961823 packets output, 44389192873 bytes, 0 underruns
    0 output errors, 0 collisions
SRT-GRAND-SHIT_172.16.10.9#show interface vlan 100

 

#show interface vlan 16
Vlan16 is up, line protocol is up, dev index is 3016
  Device flag 0x1003(UP BROADCAST MULTICAST)
  Time since last status change:0w-1d-2h-50m-45s  (96645 seconds)
  IPv4 address is:
    172.16.10.9      255.255.255.0     (Primary)
  VRF Bind: Not Bind
  Hardware is EtherSVI, address is f8-f0-82-10-fb-a8
  MTU is 1500 bytes , BW is 0 Kbit
  Encapsulation ARPA, loopback not set
  5 minute input rate 8363 bits/sec, 6 packets/sec
  5 minute output rate 3591 bits/sec, 3 packets/sec
  The last 5 second input rate 11957 bits/sec, 10 packets/sec
  The last 5 second output rate 13450 bits/sec, 7 packets/sec
  Input packets statistics:
    Input queue 0/300, 0 drops
    35969314 packets input, 40701105634 bytes, 0 no buffer
    0 input errors, 0 CRC, 0 oversize, 0 undersize
     0 jabber, 0 fragments
  Output packets statistics:
    23550133 packets output, 10173962093 bytes, 0 underruns
    0 output errors, 0 collisions

#show interface vlan 100
Vlan100 is up, line protocol is up, dev index is 3100
  Device flag 0x1003(UP BROADCAST MULTICAST)
  Time since last status change:0w-0d-0h-7m-59s  (479 seconds)
  IPv4 address is:
    (NULL)
  VRF Bind: Not Bind
  Hardware is EtherSVI, address is f8-f0-82-10-fb-a8
  MTU is 1500 bytes , BW is 0 Kbit
  Encapsulation ARPA, loopback not set
  5 minute input rate 8699 bits/sec, 6 packets/sec
  5 minute output rate 3788 bits/sec, 3 packets/sec
  The last 5 second input rate 22787 bits/sec, 11 packets/sec
  The last 5 second output rate 12935 bits/sec, 8 packets/sec
  Input packets statistics:
    Input queue 0/300, 0 drops
    35969377 packets input, 40701121917 bytes, 0 no buffer
    0 input errors, 0 CRC, 0 oversize, 0 undersize
     0 jabber, 0 fragments
  Output packets statistics:
    23550180 packets output, 10173971336 bytes, 0 underruns

 

Конфигурация аплинка.

 

Interface Ethernet1/25
 media-type copper
 description UPLINK -> SRT-GRAND-SHIT_172.16.10.7
 switchport discard packet untag
 switchport mode trunk
 switchport trunk allowed vlan 16;100;200;1682
 ip dhcp snooping trust vlan 200;1682
 ip arp inspection trust
 

Конфигурация даунлинка на вышестоящем коммутаторе.

 

Interface Ethernet1/26
 media-type copper
 description DOWNLINK -> SRT-GRAND-SHIT_172.16.10.9
 switchport mode trunk
 switchport trunk allowed vlan 16;200;1682
 ip dhcp snooping trust vlan 200;1682
 ip arp inspection trust
 

Проверял на коммутатора 2950, 2960 обновленными до последней актуальной прошивки. Ситуация одинаковы. Подскажите в чем может быть проблема?


 

 

 

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Статистика по L3 интерфейсам считается как суммарный трафик со всех портов где присутствует vlan, причем трафик на порту учитывается не в конкретном vlan, а весь. Это аппаратное ограничение чипсета коммутатора.

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Более, того, при исключении порта из вилана, счетчик "отпрыгивает" назад, в результате на графиках могут получаться террабитовые скорости, если пользоваться rrd-tool например.

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