R0106-HP MSR Router Series Layer 3 - IP Services Command Reference(V7)

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Default
An interface cannot forward directed broadcasts destined for the directly connected network.
Views
Interface view
Predefined user roles
network-admin
Usage guidelines
A directed broadcast packet is destined for all hosts on a specific network. In the destination IP address
of the directed broadcast, the network ID identifies the target network, and the host ID is made up of all
ones.
If an interface is allowed to forward directed broadcasts destined for the directly connected network,
hackers can exploit this vulnerability to attack the target network. In some scenarios, however, an
interface must receive and send such directed broadcast packets to support UDP helper and Wake on
LAN.
This command enables an interface to accept directed broadcast packets that are destined for and
received from the directly connected network to support UDP helper. UDP helper converts the directed
broadcasts to unicasts and forwards them to a specific server.
The command also enables the interface to forward directed broadcast packets that are destined for the
directly connected network and are received from another subnet to support Wake on LAN. Wake on
LAN sends the directed broadcasts to wake up the hosts on the target network.
Examples
# Enable the interface GigabitEthernet 2/1/1 to receive and forward directed broadcast packets
destined for the directly connected network.
<Sysname> system-view
[Sysname] interface gigabitethernet 2/1/1
[Sysname-GigabitEthernet2/1/1] ip forward-broadcast
ip icmp error-interval
Use ip icmp error-interval to set the interval and bucket size for ICMP error messages.
Use undo ip icmp error-interval to restore the default.
Syntax
ip icmp error-interval milliseconds [ bucketsize ]
undo ip icmp error-interval
Default
The bucket allows a maximum of 10 tokens, and tokens are placed in the bucket at the interval of 100
milliseconds.
Views
System view
Predefined user roles
network-admin