Static Routes

Question 1

What is a default static route?

Answer 1

-A default static route is a route that matches all packets.

-A default route identifies the gateway IP address to which the router sends all IP packets that it does not have a learned or static route.

-A default static route is simply a static route with 0.0.0.0/0 as the
destination IPv4 address.

Question 2

Floating Static Routes

Answer 2

Floating static routes have an
administrative distance greater
than the administrative distance
of another static route or
dynamic routes.

The static route “floats” and is
not used when the route with
the better administrative
distance is active.

If the preferred route is lost
the floating static route can
take over.

Question 3

Test the IPv4 Floating Static Route

Answer 3

To test a floating static route:

Use the show ip route command to verify that the routing table is
using the default static route.

Use the traceroute command to follow the traffic flow out the
primary route.

Disconnect the link or shutdown the primary interface(s). In the
curriculum example the serial interfaces on R2 are shutdown.

Use a show ip route command to verify that the routing table is
using the floating static route.

Use a traceroute command to follow the traffic flow out the
backup route.

Question 4

Troubleshoot a Missing Route

Answer 4

IOS troubleshooting
commands include:

ping

Extended ping enables you
to specify the source IP
address for the ping packets.
traceroute

show ip route

show ip interface
brief

show cdp neighbors detail

Question 5

Static Route Uses

Answer 5

Providing ease of routing table maintenance in smaller networks
that are not expected to grow significantly.

Routing to and from a stub network. A network with only one
default route out and no knowledge of any remote networks.

Accessing a single default router. This is used to represent a
path to any network that does not have a match in the routing
table.