IBM RackSwitch G8000, Application Manual

Page: 245 / 362

© Copyright IBM Corp. 2011 Chapter 20. Multicast Listener Discovery
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Dynamic Mrouters
The switch learns Mrouters on the ingress VLANs of the MLD-enabled interface. All
report or done messages are forwarded to these Mrouters. By default, the option of
dynamically learning Mrouters is disabled. To enable it, use the following command:
MLD Capacity and Default Values
Table 21 lists the maximum and minimum values of the G8000 variables.
Table 22 lists the default settings for MLD features and variables.
RS G8000(config)#
interface ip
<interface number>
RS G8000(config-ip-if)#
ipv6 mld dmrtr enable
Table 21. G8000 Capacity Table
Variable Maximum Value
IPv6 Multicast Entries 256
IPv6 Interfaces for MLD 8
Table 22. MLD Timers and Default Values
Field Default Value
Robustness Variable (RV) 2
Query Interval (QI) 125 seconds
Query Response Interval (QRI) 10 seconds
Multicast Address Listeners Interval
(MALI)
260 seconds [derived: RV*QI+QRI]
Other Querier Present Interval [OQPT] 255 seconds [derived: RV*QI + ½ QRI]
Start up Query Interval [SQI] 31.25 seconds [derived: ¼ * QI]
Startup Query Count [SQC] 2 [derived: RV]
Last Listener Query Interval [LLQI] 1 second
Last Listener Query Count [LLQC] 2 [derived: RV]
Last Listener Query Time [LLQT] 2 seconds [derived: LLQI * LLQT]
Older Version Querier Present Timeout:
[OVQPT]
260 seconds [derived: RV*QI+ QRI]
Older Version Host Present Interval
[OVHPT]
260 seconds [derived: RV* QI+QRI]