Re: how to ensure the connection of LAN is connected?

On Sat, 01 Apr 2006, in the Usenet newsgroup alt.os.linux.redhat, in article
<e0meu002png@xxxxxxxxxxxxxxxxxx>, Joe Cipale wrote:

If you type: ping -b -c 2 192.168.1.255

This will respond with a ping from all of the machines on your network.

The obvious assumption is that is the broadcast address. This may or
may not work depending on several things - the least of which is
whether the operating system on those other systems will respond to
a broadcast ping. Many do not do so. Additionally, there may be filtering
in place - either a "personal firewall" (common in the windoze world)
or (as in Linux) the local setup has disabled responses to broadcasts
or ping in general. See the values in /proc/sys/net/ipv4/icmp*

Old guy
.

Relevant Pages

  • Re: Translate MAC address to IP address
    ... > If you ping the broadcast addr you will get a reply from ... > prevent it from replying to ping. ... I get nothing back from machines running Windows XP, ... I've always done it with arp myself. ...
    (freebsd-net)
  • replacing a NIC
    ... The kernel/NIC runs a self-test and ... I try to ping some sites to verify and I get 100% packet loss. ... I did ping to the broadcast address and machines on the ...
    (Debian-User)
  • Re: python and LAN
    ... TG> What operating system do you use? ... winXP, LAN consists of ~300 pc's, 5 segment, Iam not admin ... TG> Some systems answer ping to the ... TG> broadcast address, but not all ...
    (comp.lang.python)
  • RE : Router problems on Redhat 9.0 Linux 2.4.20-13.9.HOSTAP
    ... General Red Hat Linux discussion list ... >> Your wlan range is inside that so no routing is performed. ... > The machines on the wireless network should have the default gateway ... it looks like the you can ping from a machine on ...
    (RedHat)
  • Access limitations(?), and moving to a simple LAN
    ... both machines were able to ping the ... >> couldn't see shares defined on the RPC. ... > connection will set the default route to the modem so everything goes ... and from each machine I can ping all three devices. ...
    (comp.sys.acorn.networking)