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Configuring an Outbound Interface to Fragment IP Packets
Context
During actual packet forwarding, the length of an IP packet may exceed the MTU value. Packets whose length exceeds the MTU value and the DF field is 1 are discarded. Therefore, IP packet fragmentation can be enabled so that the system sets the DF field of IP packets to 0 and fragments the packets. In this way, all IP packets can be forwarded.
Procedure
- Run system-view
The system view is displayed.
- Run interface interface-type interface-number
The interface view is displayed.
The function that clears the DF field is valid for outgoing packets; therefore, this function must be configured on the outbound interface.
- Run clear ip df
The IP packet fragmentation is enabled on an outbound interface.
By default, an outbound interface does not fragment IP packets.
