Configuration Guide User guide

1618 FastIron Configuration Guide
53-1002494-02
MLD snooping configuration
Brocade(config)#ipv6 mld-snooping query-interval 120
Syntax: [no] ipv6 mld-snooping query-interval <interval>
The <interval> parameter specifies the interval between queries. You can specify a value from 10 –
3600 seconds. The default is 60 seconds.
Configuring the global MLD version
The default version is MLDv1. You can specify the global MLD version on the device as either
MLDv1 or MLDv2. For example, the following command configures the device to use MLDv2.
Brocade(config)#ipv6 mld-snooping version 2
Syntax: [no] ipv6 mld-snooping version 1 | 2
You can also specify the MLD version for individual VLANs, or individual ports within VLANs. If no
MLD version is specified for a VLAN, then the globally configured MLD version is used. If an MLD
version is specified for individual ports in a VLAN, those ports use that version instead of the
version specified for the VLAN or the globally specified version. The default is MLDv1.
Configuring report control
When a device is in passive mode, it forwards reports and leave messages from clients to the
upstream router ports that are receiving queries.
You can configure report control to rate-limit report forwarding for the same group to no more than
once per 10 seconds. This rate limiting does not apply to the first report answering a group-specific
query.
NOTE
This feature applies to MLDv1 only. The leave messages are not rate limited.
MLDv1 membership reports for the same group from different clients are considered to be the
same, and are rate-limited. This alleviates the report storm caused by multiple clients answering
the upstream router query.
To enable report-control, enter the ipv6 mld-snooping report-control command.
Brocade(config)#ipv6 mld-snooping report-control
Syntax: [no] ipv6 mld-snooping report-control
Modifying the wait time before stopping traffic when
receiving a leave message
You can define the wait time before stopping traffic to a port when the device receives a leave
message for that port. The device sends group-specific queries once per second to determine if any
client on the same port still needs the group.
Brocade(config)#ipv6 mld-snooping leave-wait-time 1
Syntax: [no] ipv6 mld-snooping leave-wait-time <num>
where <num> is a value from 1 to 5. The default is 2. Because of the internal timer accuracy, the
actual wait time is between n and (n+1) seconds, where n is the configured value.