Ip virtual-reassembly command
From NetworkStuff
An CLI command available on most Cisco routing platforms; used to enable, disable or modify virtual fragmentation reassembly (VFR). VFR Is used by some IP based security functions and/or protocols to reassemble fragmented IP datagrams to allow them to be inspected.
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Usage Syntax
Configuration Context: Interface Configuration Mode
[no] ip virtual-reassembly [options]
Common options include;
- drop-fragments - configure the interface to drop all incoming fragments received
- max-fragments n - specify the maximum number of fragments per datagram reassembly. Specify a valid number in the range 1 - 64, the default is 32
- max-reassemblies n - specify the maximum number of concurrent reassemblies. Specify a valid number in the range 1 - 1024, the default is 16
- timeout s - specify the timeout value, in seconds, of the datagram being reassembled. Specify seconds in the range 1 - 64, the default is 3s
Usage Notes
The virtual fragmentation reassembly feature is automatically enabled on relevant interfaces when security features or protocols such as NAT, firewall or IDS are configured for that interface. Use the no prefix with this command to disable IP virtual fragmentation reassembly.
Cisco Usage Notes
Use ? to display context sensitive help; a list of available commands, a list of available command parameters or a list of available files and/or file systems.
Use [TAB] to auto-complete commands or file names.
To make more effective use of the command line interface; filter show command output using Command Output Filters and use the available CLI Edit Keys.
Don't forget to save your changes using the copy run start command as necessary.
Related Commands
The show ip virtual-reassembly command is used to display virtual fragmentation reassembly configuration parameters and statistics.
Further Information
Cisco's Virtual Fragmentation Reassembly Feature Guide
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Information on Secure Platform commands
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