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Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Fragmentation is a process of breaking down an IP datagram into smaller packets to be transmitted over different types of network media. Non-initial fragments of a fragmented IPv6 packet is used to pass through IPsec and NAT64 without any examination due to the lack of the L4 header, which usually is only available on the initial fragment. The IPv6 Virtual Fragmentation Reassembly (VFR) feature provides the ability to collect the fragments and provide L4 info for all fragments for IPsec and NAT64 features.
1.
enable
2.
configure
terminal
3.
interface
type
number
4. ipv6 virtual-reassembly [in | out] [max-reassemblies maxreassemblies] [max-fragments max-fragments] [timeout seconds] [drop-fragments
5.
exit
6. show ipv6 virtual-reassembly interface interface-type
7. show ipv6 virtual-reassembly features interface interface-type
Router# show ipv6 virtual-reassembly interface gigabitethernet1/1/1 GigabitEthernet1/1/1: IPv6 Virtual Fragment Reassembly (VFR) is ENABLED(in) Concurrent reassemblies (max-reassemblies): 64 Fragments per reassembly (max-fragments): 16 Reassembly timeout (timeout): 3 seconds Drop fragments: OFF Current reassembly count: 0 Current fragment count: 0 Total reassembly count: 6950 Total reassembly timeout count: 9 GigabitEthernet1/1/1: IPv6 Virtual Fragment Reassembly (VFR) is ENABLED(out) Concurrent reassemblies (max-reassemblies): 64 Fragments per reassembly (max-fragments): 16 Reassembly timeout (timeout): 3 seconds Drop fragments: OFF Current reassembly count: 0 Current fragment count: 0 Total reassembly count: 0 Total reassembly timeout count: 0
Related Topic |
Document Title |
---|---|
IPv6 addressing and connectivity |
IPv6 Configuration Guide |
Cisco IOS commands |
|
IPv6 commands |
IPv6 Command Reference |
Cisco IOS IPv6 features |
Standard/RFC |
Title |
---|---|
RFCs for IPv6 |
Description |
Link |
---|---|
The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. |
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.Feature Name |
Releases |
Feature Information |
---|---|---|
IPv6 Virtual Fragmentation Reassembly |
Cisco IOS XE Release 3.4S |
The IPv6 VFR feature provides the ability to collect the fragments and provide L4 info for all fragments for IPsec and NAT64 features. |