412
C
HAPTER
16: I
NTERNET
P
ROTOCOL
(IP)
ip interface
✓
3500
✓
9000
9400
3900
9300
directedBroadcast
For CoreBuilder 9000: Applies to Layer 3 switching modules only.
Specifies whether the forwarding of a directed broadcast (all 1s in the
host portion of the address) is enabled or disabled for a specified
interface. A
directed broadcast
is a packet that is sent to a specific
network or series of networks.
Valid Minimum Abbreviation
ip i di
Important Considerations
■
You define the directed broadcast state on a per-interface basis.
■
When the state is
enabled
and the system determines that the
destination is different from the interface that is receiving the directed
broadcast, the system uses the broadcast address that is defined for
this interface to forward the directed broadcast.
■
You can disable the forwarding of a directed broadcast if security is an
issue.
■
By default, the directed broadcast state is
enabled
.
Options
IP Interface Directed Broadcast Example (3500)
Select menu option (ip/interface): directedBroadcast
Select IP interfaces (1,2|all|?):2
Interface 2 - Enter directed broadcast state
(disabled, enabled) [enabled]:
Prompt Description Possible Values [Default]
IP interfaces Index numbers of the interfaces
to which you want to enable or
disable the forwarding of a
directed broadcast.
(Not applicable if you have more
than one interface)
■
One or more
selectable
interface
indexes
■
all
■
? (for a list of
selectable
interface
indexes)
Current
value
Directed
broadcast state
Whether you want to implement
direct broadcast on an interface.
The system prompts you for a
state for each interface.
■
enabled
■
disabled
Current
value
