Contents
What is Iff_running?
IFF_RUNNING. This flag indicates that the interface is up and running. It is mostly present for BSD compatibility; the kernel makes little use of it.
What is Iff_no_pi?
IFF_NO_PI tells the kernel to not provide packet information. The purpose of IFF_NO_PI is to tell the kernel that packets will be “pure” IP packets, with no added bytes. Otherwise (if IFF_NO_PI is unset), 4 extra bytes are added to the beginning of the packet (2 flag bytes and 2 protocol bytes).
What is Siocgifhwaddr?
SIOCGIFHWADDR, SIOCSIFHWADDR. Get or set the hardware address of a device using ifr_hwaddr. The hardware address is specified in a struct sockaddr. sa_family contains the ARPHRD_* device type, sa_data the L2 hardware address starting from byte 0. Setting the hardware address is a privileged operation.
How to put a network interface up or down?
1) This answer is only for a wired connection. Use ifup and ifdown, not ifconfig, unless you want to manually specify the parameters. ifup will look at your network configuration in /etc/network/interfaces (or wherever your distro puts it).
Why does my Cisco router say interface down?
When I connect the router to the public IP, te interface goes Status down, protocol down, when I connect it to the DHCP connection everything it’s up, the interface works and my router goes to internet, not even the led indicator it’s on with the public IP connection.
When does the G0 / 2 interface go up or down?
If I connect mi laptop to G0/2, the interface goes up, G0/2 works, it goes down only when I connect it to the Public IP port. That port goes to a Ruckus switch. 02-05-2019 02:14 PM
How to configure two network interfaces at once?
The following example configures two network interfaces: eth0 is brought up at boot, and uses DHCP for IPv4 and SLAAC for IPv6, whereas eth1 is brought up whenever the network hardware is detected, and is configured with static IPv4 and IPv6 addresses.