This command does exactly what I was looking for:. This command takes at most ms to complete, and gives me the ping status of all the hosts at once:. What OS are you on? For people looking for a solution that involves ping , use the -i switch. See the nmap Documentation for more details on this. It's a quick way to check if machine responds at all, assuming it'll respond in time less then specified amount of seconds. It does the same thing but uses layer 2 arp packets to do the 'ping'.
You can use a combination of arpping and icmp ping, or in fact tcp ping, to gather what the failure is. EXample is a tcp stack crash, although rare these days, we could find if a machine tcp stack had crashed, as the machine would not respond to ping, however it would respond to arp which is a different piece of code on the host.
If you have managed ethernet switches you can get physical link data, revealing if the machine is actually switched on, or had been physically unplugged. We had a situation where machines clients in public rooms would be switched off, we gathered that data and the sent wake on lan packets, to power up the machines. What ever solutions you build, if your network is busy, think about implementiing some kind of qos , so that your monitoring packets take priority on the network, losing measurement packets due to network congestion can give false alarms.
If do use qos for monitoring packets, then you'll need to think about gathering data about network utilisation. So, you can make your monitoring solution as complex or as easy as you like. We find even the most elementary monitoring system is a step in the right direction, at least some administrator is keeping any eye on machines If you can scan your subnet or part of it without triggering security alarms, and don't mind a bit of extra data, Angry IP Scanner is fast, free, lets you click to sort by status, and can provide more detailed information.
Why not launch ping in the background, with output to a temporary file, in parallel for every host? Then sleep for one second, kill any ping processes that are still running, and read the files to collect the output.
The timeout is an integer value indicating how far and long the packet can be sent. Values below 1 are meaningless. A value of 1 indicates you are pinging immediate neighbors only. The only way to speed things up is to run a background check and harvest the results. This is what tools like Nagios do.
On macOS, to set the time ping waits for a response form the server before deciding its a non-response timeout is -t :. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more.
How can I set a short timeout with the ping command? Ask Question. Asked 11 years ago. Active 7 months ago. Viewed k times. So, my script launches a single ping for each host: ping -c 1 So I tried this: ping -c 1 -W 1 I tried to set it to below a second, but it does not seem to take the parameter into account at all: ping -c 1 -W 0.
If not, are there any alternatives? Edit The O. The hosts I am trying to ping are actually access points. The author's area of specialization is wireless and Cybersecurity.
Alex George. He had been working as a senior Network Engineer for ten years. His specialization is in Cisco products. Traveling is one of his hobbies and visited various places as part of his onsite work. He visited different places as part of his onsite work like New York, Dubai, London, etc. He guides a lot of students to get selection for various prestigious institutions like CBI, Income Tax Department, etc. Alex George is a stock market investor and a very active intraday trader. Engineering Background: He has a B.
He is an active intraday trader and a Share Market Investor. P acket IN ternet G roper Ping allows you to quickly verify the connectivity of your Internet connection to our servers. Ping attempts to transmit a packet from your computer to a website on the network and listens for the response to ensure that it was correctly received. This article is provided solely as a courtesy to our customers. Please take a moment to review the Statement of Support.
This sort of ping command will most often result in one of two responses. You will either see something like this which is a good response :. Or you might see something like this which is not a good response and indicates either your internet connection is having issues, or the server is not reachable :.
The reason you will see multiple results is that the ping command will generally attempt to "ping" the destination four times.
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