IP Routing Features
Overview of IP Routing
Time to Live
The maximum number of routers (hops) through
which a packet can pass before being discarded.
Each router decreases a packet's TTL by 1 before
forwarding the packet.
the TTL to be 0, the router drops the packet instead
of forwarding it.
A directed broadcast is a packet containing all ones
(or in some cases, all zeros) in the host portion of the
destination IP address.
such a broadcast, it sends a copy of the packet out
each of its enabled IP interfaces.
on an individual interface basis. See table 5-2 on
An IP protocol that a router can use to advertise the
IP addresses of its router interfaces to directly
attached hosts. You can enable or disable the
protocol at the Global CLI Config level.
You also can enable or disable IRDP and configure
the following protocol parameters on an individual
VLAN interface basis at the VLAN Interface CLI
• Forwarding method (broadcast or multicast)
• Hold time
• Maximum advertisement interval
• Minimum advertisement interval
• Router preference level
An IP route you place in the IP route table.
The router uses the default network route if the IP
route table does not contain a route to the
destination. Enter an explicit default route (0.0.0.0
0.0.0.0 or 0.0.0.0/0) as a static route in the IP route
creasing the TTL causes
en a router forwards
: You also can enable or disable this parameter
Refer to the