HPE 5900 series

158
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 VLAN-interface 2 to receive and forward directed broadcast packets destined for the
directly connected network.
<Sysname> system-view
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] ip forward-broadcast
ip icmp error-interval
Use ip icmp error-interval to set the bucket size and the interval for tokens to arrive in the bucket 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
Parameters
milliseconds: Specifies the interval for tokens to arrive in the bucket. The value range is 0 to
2147483647 milliseconds, and the default is 100 milliseconds. To disable the ICMP rate limit, set the
value to 0.
bucketsize: Specifies the maximum number of tokens allowed in the bucket. The value range is 1 to
200, and the default is 10.
Usage guidelines
This command limits the rate at which ICMP error messages are sent. Use this command to avoid
sending excessive ICMP error messages within a short period that might cause network congestion.
A token bucket algorithm is used with one token representing one ICMP error message. Tokens are
placed in the bucket at intervals until the maximum number of tokens that the bucket can hold is
reached. Tokens are removed from the bucket when ICMP error messages are sent. When the
bucket is empty, ICMP error messages are not sent until a new token is placed in the bucket.
Examples
# Configure an interval of 200 milliseconds and bucket size of 40 tokens for ICMP error messages.
<Sysname> system-view
[Sysname] ip icmp error-interval 200 40