Configuring Virtual Fragment Reassembly of IP Packets
Context
During network transmission, IP packets are fragmented if they have a long length. The forwarding device forwards the fragmented packets, and the destination device receives the fragmented packets and reassembles them. If some fragmented packets are discarded during transmission due to the bandwidth limitation, the packets cannot be reassembled on the destination device. To solve the problem, you can enable virtual fragment reassembly of IP packets on the device functioning as the intermediate of fragmented packets. After that, the device checks, sorts, and caches the fragmented packets received to ensure complete packet forwarding or scheduling.
Procedure
- Run system-view
The system view is displayed.
- Enable virtual fragment reassembly of IP packets.
Run ip virtual-reassembly
Virtual fragment reassembly of IP packets is enabled.
By default, virtual fragment reassembly of IP packets is disabled.
If NAT, firewall, smart application control (SAC), or deep security defense is configured on the device, virtual fragment reassembly of IP packets is enabled by default and cannot be disabled. The undo ip virtual-reassembly command does not take effect.
Run ip option-virtual-reassembly
Virtual fragment reassembly of IP packets with options is enabled globally.
By default, virtual fragment reassembly of IP packets with options is disabled globally.
