Ruijie RG-S29 Series - Page 472

Command Reference IP Address/Service Commands
Usage Guide
IP directed broadcast packet is an IP packet whose destination address is an IP subnet
broadcast address. For example, the packet with the destination address 172.16.16.255 is
called a directed broadcast packet. However, the node that generates this packet is not a
member of the destination subnet.
The device that is not directly connected to the destination subnet receives an IP directed
broadcast packet and handles this packet in the same way as forwarding a unicast packet.
After the directed broadcast packet reaches a device that is directly connected to this subnet,
the device converts the directed broadcast packet into a flooding broadcast packet (typically
the broadcast packet whose destination IP address is all “1”), and then sends the packet to all
the hosts in the destination subnet in the manner of link layer broadcast.
You can enable conversion from directed broadcast into physical broadcast on a specified
interface, so that this interface can forward a direct broadcast packet to a directly connected
network. This command affects only the final transmission of directed broadcast packets that
have reached the destination subnet instead of normal forwarding of other directed broadcast
packets.
You can also define an access list on an interface to control which directed broadcast packets
to forward. After an access list is defined, only the packets that conform to the conditions
defined in the access list undergo conversion from directed broadcast into physical broadcast.
If the no ip directed-broadcast command is configured on an interface, RGOS will discard the
directed broadcast packets received from the directly connected network.
Configuration
Examples
The following example enables forwarding of directed broadcast packet on the fastEthernet 0/1
port of a device.
Ruijie(config)# interface fastEthernet 0/1
Ruijie(config-if)# ip directed-broadcast
Related Commands
Command
Description
N/A
N/A
Platform
Description
N/A
1.4 ip icmp error-interval
Use this command to set the rate to send the ICMP destination unreachable packets triggered by
DF in the IP header. Use the no form of this command to restore the default setting.
ip icmp error-interval DF milliseconds [ bucket-size ]
no ip icmp error-interval DF milliseconds [ bucket-size ]
Use this command to set the rate to send other ICMP error packets. Use the no form of this
command to restore the default setting.