The unit has 5 office today appeared multiple computers can't get to the Internet problem (ping gateway blocked or serious lost package),

The failure has the following of this a few office thing in common:

1. The Internet computer fault are even on a single Hub (8 with the Hub),
2. On the hub and even have other computer is power off, and these have shut down the computer cable lights flashing (crystal is cable head flashing, non-electric

Brain nic flashing), evidence of data transmission,
3. The data transmission of these is power off but there are still a basic computer operating system is XP system (only 1 for Windows 7 system, models for DELL 760)

,

4. The problem of the computer is old (with 5 years or so),

5. Problem is limited to a hub, and hub even on the same floor switches other devices on the network is not affected, the running

, the top of the floor switch hub network failure (layer 3 switches), according to the log normal
6. These have shut down the computer run (not into the system, boot), or shut off the power, or disconnect wiring can make the network

Back to normal,


My idea:

Should be turned off after the computer network packets sent to hub work abnormal hubs lights flashing anomalous (observation), to quickly solve the current problems of

Method is the hub of all computer boot operation,

Should not be virus, because I think the fault is caused by the computer after shutdown, shut down the computer operating system is closed, and switch network

Running is normal, or install xp and Windows 7 system of new computer (buy) nearly 2 years all had no such problem,

Such problems didn't show up today, and it is piled up (5 office nearly 30 computers, belong to different switches under the floor), some people

Reflect a boot will not be able to get to the Internet, some people reflect is suddenly can't get to the Internet, never met before, now can reduce fault computers to xp system

System (only one Windows 7 May temporarily not first consider), xp would have stopped the system update, should not update patch today,



Really think impassability why yesterday network normal today will appear this kind of network fault, please technical help to analyze the great god, thank you!

CodePudding user response:

Summarizing, can think the problem focused on several computers and hub is power off this paragraph, and the fault is concentrated at the same time:
From the analysis on hardware, several computers at the same time a hardware failure is almost impossible, can only be a hub of fault
From the analysis on the software, can consider whether updated system at the same time, a computer or attacked

CodePudding user response:

reference 1st floor cain0203 response:

summary, can think the problem focused on several computers and hub is power off, between this paragraph and the fault is concentrated at the same time:
From the analysis on hardware, several computers at the same time a hardware failure is almost impossible, can only be a hub of fault
From the analysis on the software, can consider whether updated system at the same time, a computer or attacked

Thank you very much!

CodePudding user response:

Your company is all computers use a hub? If not, presumably those who couldn't get on the net (ARP) virus in the computer may be, (personal opinion can try)

Another possibility is the hub is broken ~

CodePudding user response:

Automatic assignment of DHCP hub is out of order, add a path by automatically assigned address

CodePudding user response:

The forehead hub, come in,

CodePudding user response:

Agree with the upstairs, have met before switch aging failure, so the light is also abnormal blinking

CodePudding user response:

This phenomenon hub failure probability is quite big

CodePudding user response:

Change a hub to try, if not yet; In the check the computer

CodePudding user response:

Computer shut down, cable lights will shine? Are you kidding,
Lights flashing on how data flow, but how can there be a data flow computer shut down?
What you said had problems

CodePudding user response:

A HUB under the restart.

CodePudding user response:

Learning the==

CodePudding user response:

It seems, may be a hub is broken

CodePudding user response:

With a caught software to have a look at will know that I think is a boot the computer send radio broadcast storm caused by blocked the hub, lead to all ports, the cause of broadcast storm has just has to do with you that a few XP dormancy,

CodePudding user response:

In hub, or hubs to computer wiring problem

CodePudding user response:

Computer shutdown state also met nic lamp normally on problems, you have great god has respond to the above, we can move a normal computer to replace one of the units under failure on a computer, see if there is something wrong, such as abnormal, and consider a hub, another: pay attention to the virus OR ARP attack

CodePudding user response:

The HUB , change the switch

CodePudding user response:

Line produce loop?

CodePudding user response:

,,,, this my computer shut down card will flash, flash frequency is not soon, 2-3 under this, a second, a great god can come out to explain to her little brother?

I think I should do with the BIOS Settings,,
May also be the board bored want to surf the Internet to see what,

CodePudding user response:

Try shut all the computer to see the light is not?

CodePudding user response:

Replace the hub need not consider the problem in the above, the network anomaly of large area, the biggest is probably a virus attack network exchange interactive equipment, the network anomaly of large area, under normal circumstances is not the problem of the PC host,

CodePudding user response:

May a, hub failure
May 2, a computer was ARP attack

CodePudding user response:

Loop - -!

CodePudding user response:

Hub port may malfunction,
ARP attack or a computer
Or the HUB has a loop

CodePudding user response:

The HUB fault the possibility of more
Just change the eight switches!