LevelOne GTL-2691 - Manual (Page 1276)

C HAPTER 42 | Multicast Filtering Commands
MLD (Layer 3)
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C OMMAND M ODE
Interface Configuration (VLAN)
C OMMAND U SAGE
◆ Multicast routers send host query messages to determine the interfaces
that are connected to downstream hosts requesting a specific multicast
service. Only the designated multicast router for a subnet sends host
query messages, which are addressed to the link-scope all-nodes
multicast address FF02::1, and uses a time-to-live (TTL) value of 1.
◆ The designated querier is the lowest IP-addressed multicast router on
the subnet.
E XAMPLE
The following shows how to configure the query interval to 100 seconds.
Console(config-if)#ipv6 mld query-interval 100
Console(config-if)#
R ELATED C OMMANDS
ipv6 mld max-resp-interval (1275)
ipv6 mld robustval This command specifies the robustness (expected packet loss) for this
interface. Use the no form of this command to restore the default value.
S YNTAX
ipv6 mld robustval robust-value
no ipv6 mld robustval
robust-value - The robustness of this interface. (Range: 1-255)
D EFAULT S ETTING
2
C OMMAND M ODE
Interface Configuration (VLAN)
C OMMAND U SAGE
◆ The robustness value is used to compensate for expected packet lose
on a link. It indicates the number of refresh packets related to the
current MLD state which might be lost without having to terminate that
state.
◆ Routers adopt the robustness value from the most recently received
query. If the query's robustness variable (QRV) is zero, indicating that
the QRV field does not contain a declared robustness value, the switch
will set the robustness variable to the value statically configured by this
command. If the QRV exceeds 7, the maximum value of the QRV field,