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Discarding IP Packets with Invalid Destination IP Addresses and Recording Logs
Context
The following three types of IP addresses are invalid destination IP addresses and should not be used on the network:
- IP address with all 0s, that is, 0.0.0.0
- IP addresses with a network ID of 127, that is, 127.0.0.0 to 127.255.255.255
- Class E IP addresses except 255.255.255.255, that is, 240.0.0.0 to 255.255.255.254
If the device processes the IP packets with these invalid destination IP addresses, the device burden is increased and network bandwidth is consumed. To solve this problem, configure the device to discard these IP packets and report statistics about the discarded packets through logs.![]()
IP packets destined to 0.0.0.0, 127.0.0.0 to 127.255.255.255, and 240.0.0.0 to 255.255.255.254 will be discarded by interfaces on the X series cards only after this function is configured on the device equipped with these cards. IP packets destined to these IP addresses are discarded by interfaces on other cards by default. This is because these interfaces discard packets destined to an IP address that does not match any routing entry, and there is no routing entry matching 0.0.0.0, 127.0.0.0 to 127.255.255.255, or 240.0.0.0 to 255.255.255.254.