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Power Injector Passive vs. Active 802.11af

https://forum.pctuning.cz/viewtopic.php?t=142341

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Power Injector Passive vs. Active 802.11af

Napsal: pon 1. čer 2009, 14:55
od Fifi
Ahoj,
zajímají mne Vaše osobní zkušenosti s použitím power injectorů. Trošku mi uniká význam užití aktivních power injectorů oproti pasivním. Teorie mne moc nezajímá, jaké jsou Vaše postřehy z praxe? Já jsem kromě toho, že passive POE neodpovídá standardu nenašel žádný problém. Více povím po ročním ostrém provozu :). Test jsem prováděl i s větší a delší zátěží a hodnoty byly pořád stejné. Tedy bezchybné.

Provedl jsem malý test:
Co z toho usoudit nevím.
AIR-PWRINJ3 (cena cca 1000 CZK)
Minitar passive POE injector (cena cca 75 CZK)
AIR-AP1131AG-E-K9 (cena cca 8000 CZK)
AIR-AP1242AG-E-K9 (cena cca 10000 CZK)

Délka kabelu:

Kód: Vybrat vše

WS-C2960-8TC-L#sh cable-diagnostics tdr int fa0/1
TDR test last run on: March 01 04:07:54

Interface Speed Local pair Pair length        Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Fa0/1     auto  Pair B     193  +/- 1  meters N/A         Open
                     Pair B     193  +/- 1  meters N/A         Open
                     Pair C     N/A                N/A         Not Supported
                     Pair D     N/A                N/A         Not Supported
AIR-PWRINJ3 (1131):

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ap#sh int BVI1
BVI1 is up, line protocol is up
  Hardware is BVI, address is 001d.4551.ab7a (bia 001d.46fe.a8f0)
  Internet address is 192.168.1.11/24
  MTU 1500 bytes, BW 54000 Kbit, DLY 5000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     4 packets output, 240 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out
AIR-PWRINJ3 (1242):

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ap#sh int BVI1
BVI1 is up, line protocol is up
  Hardware is BVI, address is 001d.a1fe.1534 (bia 001f.2755.33f0)
  Internet address is 192.168.1.11/24
  MTU 1500 bytes, BW 54000 Kbit, DLY 5000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     1 packets input, 60 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     14 packets output, 1166 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out
Passive POE (1131):

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ap#sh int BVI1
BVI1 is up, line protocol is up
  Hardware is BVI, address is 001d.4551.ab7a (bia 001d.46fe.a8f0)
  Internet address is 192.168.1.11/24
  MTU 1500 bytes, BW 54000 Kbit, DLY 5000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     3 packets input, 180 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     9 packets output, 596 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out
Passive POE (1242):

Kód: Vybrat vše

ap#sh int BVI1
BVI1 is up, line protocol is up
  Hardware is BVI, address is 001d.a1fe.1534 (bia 001f.2755.33f0)
  Internet address is 192.168.1.11/24
  MTU 1500 bytes, BW 54000 Kbit, DLY 5000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     1 packets input, 60 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     25 packets output, 1780 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out
Odezva s passive POE:

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Odpoved od 192.168.1.11: bajty=32 cas=4ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas=4ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas=4ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas=4ms TTL=255
Odezva s AIR-PWRINJ3

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Odpoved od 192.168.1.11: bajty=32 cas=2ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas=2ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas=2ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas < 1ms TTL=255
Odpoved od 192.168.1.11: bajty=32 cas=2ms TTL=255
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