09-22-2009 05:48 PM - edited 03-06-2019 07:50 AM
dear Exprts
I have switch 3750 i notes switch ports flash amber/green very fast
but connection is ok no lost .
Interfaces connected to indigo vision and pcs
is that normal ??? and what it,s reason
i heard its from mis match for duplex between switch port and interface for indigo vision .
But i put interface for indigo vision as 100 mgbs full duplex
and onother resone was about size of frame and kind of it,s encabsulation
but i used dotq on my switch
09-22-2009 05:50 PM
Do you have error messages on the switch?
Can you post your show log?
09-22-2009 05:54 PM
i will post it but after 12 hours when i take it frome switch
thank you very much for quick replay
09-24-2009 04:05 PM
no error message appears to me
this is the port status during problem
now i think it mis match duplex because i see the port is half duplex and indigo vision is full duplex
but this problem doesnot appeare permenant
it is some times only
FastEthernet1/0/28 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 0022.bea4.f720 (bia 0022.bea4.f720)
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)
Half-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 never, output 00:00:01, output hang never
Last clearing of "show interface" counters never
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 362000 bits/sec, 62 packets/sec
5 minute output rate 17000 bits/sec, 32 packets/sec
43827 packets input, 35284048 bytes, 0 no buffer
Received 0 broadcasts (0 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
37089 packets output, 2783410 bytes, 0 underruns
0 output errors, 65 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 ou
09-24-2009 04:10 PM
no error message appears to me
this is the port status during problem
now i think it mis match duplex because i see the port is half duplex and indigo vision is full duplex
but this problem doesnot appeare permenant
it is some times only
FastEthernet1/0/28 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 0022.bea4.f720 (bia 0022.bea4.f720)
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)
Half-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 never, output 00:00:01, output hang never
Last clearing of "show interface" counters never
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 362000 bits/sec, 62 packets/sec
5 minute output rate 17000 bits/sec, 32 packets/sec
43827 packets input, 35284048 bytes, 0 no buffer
Received 0 broadcasts (0 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
37089 packets output, 2783410 bytes, 0 underruns
0 output errors, 65 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 ou
09-24-2009 04:37 PM
Fa1/0/28 is negotiated to Half duplex and there's a small amount of collision. If you enter the command sh contr e f1/0/28 from time to time, do you observe the various collision counters incrementing?
09-25-2009 04:06 PM
now it,s ok
no collision
and led is green
what is the reason for collision ????
09-25-2009 04:47 PM
In a half duplex Ethernet network, a collision is the result of two devices on the same Ethernet network attempting to transmit data at exactly the same time. The network detects the "collision" of the two transmitted packets and discards them both. Collisions are a natural occurrence on Ethernets. Ethernet uses Carrier Sense Multiple Access/ Collision Detect (CSMA/CD) as its method of allowing devices to "take turns" using the signal carrier line. When a device wants to transmit, it checks the signal level of the line to determine whether someone else is already using it. If it is already in use, the device waits and retries, perhaps in a few seconds. If it isn't in use, the device transmits. However, two devices can transmit at the same time in which case a collision occurs and both devices detect it. Each device then waits a random amount of time and retries until successful in getting the transmission sent.
The best remedy for collisions is to upgrade to a full duplex switched environment.
Hope this addresses your questions
11-23-2009 11:32 AM
Hi Lavramov,
Indigo Vision CCTV Racks are 10/100/1000 ethernet adapter and the adapters of the Indigo VIsion racks are working in auto-sense.
I also had the same problem with input/crc and output error when I fixed the speed to 100 and duplexing to full.
Do not fixe the speed and duplex anymore. Set both to auto and the issue will disappear.
Regards.
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