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| General IP Routing
C
18
HAPTER
Displaying the Routing Table
network, the routing table is updated, and those changes are
immediately reflected in the FIB.
The FIB is distinct from the routing table (or, Routing Information
Base – RIB), which holds all routing information received from routing
peers. The FIB contains unique paths only. It does not contain any
secondary paths. A FIB entry consists of the minimum amount of
information necessary to make a forwarding decision on a particular
packet. The typical components within a FIB entry are a network prefix,
a router (i.e., VLAN) interface, and next hop information.
◆
The Routing Table (and
which are currently accessible for forwarding. The router must be able
to directly reach the next hop, so the VLAN interface associated with
any dynamic or static route entry must be up. Note that routes
currently not accessible for forwarding, may still be displayed by using
the
show ip route database
P
ARAMETERS
These parameters are displayed:
VLAN – VLAN identifier (i.e., configure as a valid IP subnet).
◆
◆
Destination IP Address – IP address of the destination network,
subnetwork, or host. Note that the address 0.0.0.0 indicates the
default gateway for this router.
Net Mask / Prefix Length – Network mask for the associated IP
◆
subnet. This mask identifies the host address bits used for routing to
specific subnets.
Next Hop – The IP address of the next hop (or gateway) in this route.
◆
Metric – Cost for this interface.
◆
Protocol – The protocol which generated this route information.
◆
(Options: Local, Static, RIP, OSPF, Others)
W
I
EB
NTERFACE
To display the routing table:
Click IP, Routing, Routing Table.
1.
Select Show Information from the Action List.
2.
– 756 –
show ip route
command) only displays routes
command.
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