31.2.6 Connecting to MLDv1/MLDv2 Equipment
The Switch supports MLDv1 and MLDv2. The ipv6 mld version configuration command can be used to set the version of MLD used by each interface. The following table describes the operation status corresponding to each specified version. Defaults to version 2.
|
Specified version |
Operation when the version is specified |
|---|---|
|
version 1 |
MLDv1 is used for operation. MLDv2 packets are disregarded. |
|
version 2 |
Both MLDv1 and MLDv2 can be used for operation. MLDv1 and MLDv2 are used for operation for each group address. |
|
version 2 only |
MLDv2 is used for operation. MLDv1 packets are disregarded. |
- <Structure of this section>
(1) Connecting to a MLDv1/MLDv2 Router
If more than one MLD router exists on the same network, for example, in a redundant configuration, Querier is determined by receiving each other's Query (see "Determining 31.2.3 Querier"). The Switch does not support connections to MLDv1 routers through interfaces for which the MLD version is set to version 2 or version 2 only. This is because v1 Queries are disregarded, preventing the Querier from being determined. To connect to an MLDv1 router, set the MLD version of the corresponding interface to version 1.
(2) Operation when MLDv1/MLDv2 hosts are mixed
When connecting to a network on which both MLDv1 hosts and MLDv2 hosts are used, make sure that the default MLD version setting is specified for the interface. However, MLDv1 hosts need to be able to receive MLDv2 Query messages as MLDv1 Query messages (as specified by the RFC).
If MLDv1 hosts and MLDv2 hosts are both used and a group join request is received, group member registrations differ depending on the MLD version, as described in the following table.
|
Group join request |
Group member registration |
|---|---|
|
Received by MLDv1 |
Group members are registered in MLDv1 mode |
|
Received by MLDv2 |
Group members are registered in MLDv2 mode |
|
Received by MLDv1 and MLDv2 |
Group members are registered in MLDv1 mode |