- IPv6 Addressing and Basic Connectivity
- IPv6 Unicast Routing
- IPv6 Anycast Address
- IPv6 Switching: Cisco Express Forwarding and Distributed Cisco Express Forwarding Support
- IPv6 Services: AAAA DNS Lookups over an IPv4 Transport
- IPv6 MTU Path Discovery
- ICMP for IPv6
- IPv6 ICMP Rate Limiting
- ICMP for IPv6 Redirect
- IPv6 Neighbor Discovery
- IPv6 Neighbor Discovery Cache
- IPv6 Default Router Preference
- IPv6 Stateless Autoconfiguration
- IPv6 Generic Prefix
- IPv6 Support on BVI Interfaces
- IPv6 RFCs
Contents
- IPv6 Support on BVI Interfaces
- Finding Feature Information
- Restrictions for IPv6 Support on BVI Interfaces
- Information About IPv6 Support on BVI Interfaces
- IPv6 on BVI Interfaces for Bridging and Routing
- Additional References
- Feature Information for IPv6 Support on BVI Interfaces
IPv6 Support on BVI Interfaces
Integrated routing and bridging (IRB) enables users to route a given protocol between routed interfaces and bridge groups or route a given protocol between bridge groups. IPv6 is supported in the bridge virtual interface (BVI), which is the IPv4 interface for bridged interfaces. This feature allows IPv6 commands to be supported on the BVI so that users can assign IPv6 addresses to a BVI and route IPv6 packets.
- Finding Feature Information
- Restrictions for IPv6 Support on BVI Interfaces
- Information About IPv6 Support on BVI Interfaces
- Additional References
- Feature Information for IPv6 Support on BVI Interfaces
Finding Feature Information
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 at the end of this module.
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.
Restrictions for IPv6 Support on BVI Interfaces
Bridge-Group Virtual Interfaces (BVIs) in IPv6 are not supported with Network Address Translation—Protocol Translation (NAT-PT).
Information About IPv6 Support on BVI Interfaces
IPv6 on BVI Interfaces for Bridging and Routing
Integrated routing and bridging (IRB) enables users to route a given protocol between routed interfaces and bridge groups or route a given protocol between bridge groups. Specifically, local or unroutable traffic will be bridged among the bridged interfaces in the same bridge group, while routable traffic will be routed to other routed interfaces or bridge groups. If you want both bridging and routing capabilities, IRB is required. If you want only bridging, you must disable routing. To disable the routing function for IPv6, you must configure the no ipv6 unicast-routing command.
IPv6 is supported in the bridge virtual interface (BVI), which is the IPv4 interface for bridged interfaces. Because bridging is in the data link layer and routing is in the network layer, they have different protocol configuration models to follow. In the basic IPv4 model, for example, all bridged interfaces should belong to the same network, while each routed interface represents a distinct network. Routed traffic is destined for the device, while bridged traffic is never destined for the device. Using BVI avoids the confusion of which protocol configuration model to use when both bridging and routing a given protocol in the same bridge group.
 Note | BVIs in IPv6 are not supported with Network Address Translation--Protocol Translation (NAT-PT). |
Additional References
Related Documents
Related Topic |
Document Title |
|---|---|
|
IPv6 addressing and connectivity |
IPv6 Configuration Guide |
|
Cisco IOS commands |
|
|
IPv6 commands |
Cisco IOS IPv6 Command Reference |
|
Cisco IOS IPv6 features |
Standards and RFCs
Standard/RFC |
Title |
|---|---|
|
RFCs for IPv6 |
IPv6 RFCs |
MIBs
|
MIB |
MIBs Link |
|---|---|
|
No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature. |
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: |
Technical Assistance
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. |
Feature Information for IPv6 Support on BVI Interfaces
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 Support on BVI Interfaces |
15.1(2)T |
This feature allows IPv6 commands to be supported on BVI so that users can assign IPv6 addresses to a BVI and route IPv6 packets. No commands were introduced or modified. |