IP-VRF(8)			     Linux			     IP-VRF(8)

NAME
       ip-vrf - run a command against a vrf

SYNOPSIS
       ip vrf  { COMMAND |  help }


       ip vrf show [ NAME ]

       ip vrf identify [ PID ]

       ip vrf pids NAME

       ip vrf exec  [ NAME ] command...


DESCRIPTION
       A VRF provides traffic isolation at layer 3 for routing, similar to how
       a VLAN is used to isolate traffic at layer 2. Fundamentally, a VRF is a
       separate routing table. Network devices are associated with a VRF by
       enslaving the device to the VRF. At that point network addresses
       assigned to the device are local to the VRF with host and connected
       routes moved to the table associated with the VRF.

       A process can specify a VRF using several APIs -- binding the socket to
       the VRF device using SO_BINDTODEVICE, setting the VRF association using
       IP_UNICAST_IF or IPV6_UNICAST_IF, or specifying the VRF for a specific
       message using IP_PKTINFO or IPV6_PKTINFO.

       By default a process is not bound to any VRF. An association can be set
       explicitly by making the program use one of the APIs mentioned above or
       implicitly using a helper to set SO_BINDTODEVICE for all IPv4 and IPv6
       sockets (AF_INET and AF_INET6) when the socket is created. This ip-vrf
       command is a helper to run a command against a specific VRF with the
       VRF association inherited parent to child.


       ip vrf show [ NAME ] - Show all configured VRF

	      This command lists all VRF and their corresponding table ids. If
	      NAME is given, then only that VRF and table id is shown. The
	      latter command is useful for scripting where the table id for a
	      VRF is needed.


       ip vrf exec [ NAME ] cmd ... - Run cmd against the named VRF

	      This command allows applications that are VRF unaware to be run
	      against a VRF other than the default VRF (main table). A command
	      can be run against the default VRF by passing the "default" as
	      the VRF name. This is useful if the current shell is associated
	      with another VRF (e.g, Management VRF).

	      This command requires the system to be booted with cgroup v2
	      (e.g. with systemd, add systemd.unified_cgroup_hierarchy=1 to
	      the kernel command line).

	      This command also requires to be run as root. Alternatively it
	      can be run by an unprivileged user if the following
	      capabilities(7) are given:


	      CAP_BPF
		     To load the BPF program.

	      CAP_NET_ADMIN
		     To set the socket into the cgroup.

	      CAP_DAC_OVERRIDE
		     To create the cgroup subdir in /sys.


	      If these capabilities are added and if ip(8) is built with
	      libcap(3) then these capabilities will be dropped before cmd is
	      executed by ip vrf exec.	For every other unprivileged
	      invocation of ip(8) all capabilities will be dropped.

	      NOTE: capabilities will NOT be dropped if CAP_NET_ADMIN is set
	      to INHERITABLE to avoid breaking programs with ambient
	      capabilities that call ip.


       ip vrf identify [PID] - Report VRF association for process

	      This command shows the VRF association of the specified process.
	      If PID is not specified then the id of the current process is
	      used.


       ip vrf pids NAME - Report processes associated with the named VRF

	      This command shows all process ids that are associated with the
	      given VRF.


CAVEATS
       This command requires a kernel compiled with CGROUPS and CGROUP_BPF
       enabled.

       The VRF helper *only* affects network layer sockets.


EXAMPLES
       ip vrf exec red ssh 10.100.1.254
	      Executes ssh to 10.100.1.254 against the VRF red table.


SEE ALSO
       ip(8), ip-link(8), ip-address(8), ip-route(8), ip-neighbor(8)


AUTHOR
       Original Manpage by David Ahern

iproute2			  7 Dec 2016			     IP-VRF(8)