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244 C
HAPTER
12: I
NTERNET
P
ROTOCOL
(IP)
Layer 2
Switching
Modules
✓
Multilayer
Switching
Modules
ip route display Displays a Multilayer Switching Module’s routing table to determine
which routes to other IP networks are configured and whether the routes
are operational.
Valid Minimum Abbreviation
ip route di
Important Considerations
■
The first line in the output (the status line) indicates whether IP routing
is enabled. It also indicates whether Internet Control Message Protocol
(ICMP) router discovery is enabled on the module.
Fields in the IP Route Display
Field Description
Destination IP address of the destination network, subnetwork, or host. This
field can also identify a default route, which the module uses to
forward packets that do not match any other routing table entry.
You may want to use the default route in place of routes to
numerous destinations that all have the same gateway IP
address.
Subnet mask Subnet mask that is associated with the IP address of the
destination network, subnetwork, or host.
Metric Associated cost of sending a packet to the destination. The
module includes the metric in its RIP and OSPF updates to allow
other routers to compare routing information received from
different sources.
Gateway Address that directs the router how to forward packets whose
destination addresses match the route’s IP address and subnet
mask. The module forwards such packets to the indicated
gateway.
Status Status of the route. See the following status table.
TTL Time To Live — Time remaining before the route expires or is
reset.