.Pp

If a forwarding information base (FIB, routing table) has been set 

within a jail using the 

.Ar exec.fib 

parameter, the 

.Nm 

utility does not honour it, and

.Ar command 

will be executed using the default fib (usually fib 0).  This can confuse users

of jails when trying to troubleshoot jail packet flows.  To properly

execute a command in a fib-configured jail using the 

.Nm

utility, it must be

prefixed with the 

.Xr setfib 1 

utility as follows.

.Pp

.Dl "setfib -F 1 jexec testjail netstat -rn"

or

.Dl "setfib 1 jexec testjail netstat -rn"

.Pp

where testjail has been assigned fib 1 in 

.Xr jail.conf 5

as follows:

.Bd -literal -offset indent

testjail {

        path = /tmp/jail/testjail;

        mount.devfs;

        host.hostname = testhostname;

        ip4.addr = 192.0.2.100;

        exec.fib = 1;

        interface = ed0;

        exec.start = "/bin/sh /etc/rc";

        exec.stop = "/bin/sh /etc/rc.shutdown";

}

.Ed