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Distributed MFIB (dMFIB) is used to switch multicast IPv6 packets on distributed platforms. The basic MFIB routines that implement the core of the forwarding logic are common to all forwarding environments.
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.
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Distributed Multicast Forwarding Information Base (MFIB) is used to switch multicast IPv6 packets on distributed platforms. Distributed MFIB may also contain platform-specific information on replication across line cards. The basic MFIB routines that implement the core of the forwarding logic are common to all forwarding environments.
dMFIB implements the following functions:
The combination of distributed MFIB and MRIB subsystems allows the device to have a "customized" copy of the MFIB database in each line card and to transport MFIB-related platform-specific information from the RP to the line cards.
Note |
Example:
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Multicast forwarding is automatically enabled when IPv6 multicast routing is enabled. However, you may want to disable multicast forwarding on a distributed platform.
This example shows how to disable multicast forwarding on a distributed platform:
Device(config)# ipv6 mfib-mode centralized-only
Related Topic | Document Title |
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Cisco IOS commands |
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IP multicast commands |
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IPv6 commands |
Cisco IOS IPv6 Command Reference |
IPv6 features |
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IPv6 addressing and connectivity |
IPv6 Configuration Guide |
Standard/RFC | Title |
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RFCs for IPv6 |
IPv6 RFCs |
MIB |
MIBs Link |
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No new or modified MIBs are supported, and support for existing MIBs has not been modified. |
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: |
Description | Link |
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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.
Table 1 | Feature Information for Distributed MFIB for IPv6 Multicast |
Feature Name | Releases | Feature Information |
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Distributed MFIB for IPv6 Multicast |
12.0(26)S 12.2(25)S 12.2(28)SB 12.3(4)T 12.4 Cisco IOS XE Release 2.1 |
Distributed MFIB is used to switch multicast IPv6 packets on distributed platforms. The following command was introduced: ipv6 mfib-mode centralized-only. |
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