Kernel routes. All the VIP addresses on which the -hostRoute option is enabled
are present in NSM FIB as kernel routes if they satisfy the required RHI
Levels. In addition, NSM FIB contains any static routes configured on the
nscli that have the -advertise option enabled. Alternatively, if the
NetScaler is operating in Static Route Advertisement (SRADV) mode, all
static routes configured on the nscli are present in NSM FIB. These static
routes are marked as kernel routes in NSM FIB, because they actually belong
to the NS kernel.
Static routes. Normally, any static route configured in VTYSH is present in NSM FIB.
If administrative distances of protocols are modified, this may not always be
the case. An important point to note is that these routes can never get into the
NS kernel.
Learned routes. If the NetScaler is configured to learn routes dynamically, the NSM
FIB contains routes learned by the various dynamic routing protocols. Routes
learned by OSPF, however, need certain special processing. They are
downloaded to FIB only if the fib-install option is enabled for the OSPF
process. This can be done from the router-config view in VTYSH.