Configuring Ipv6 Multicast Group Replacement - 3Com 4500G Family Configuration Manual

24/48 port
Hide thumbs Also See for 4500G Family:
Table of Contents

Advertisement

When the number of IPv6 multicast groups that can be joined on a port reaches the maximum
number configured, the system deletes all the forwarding entries persistent to that port from the
MLD Snooping forwarding table, and the hosts on this port need to join IPv6 multicast groups
again.
If you have configured static or simulated joining on a port, however, when the number of IPv6
multicast groups on the port exceeds the configured threshold, the system deletes all the
forwarding entries persistent to that port from the MLD Snooping forwarding table and applies the
static or simulated joining again, until the number of IPv6 multicast groups joined by the port comes
back within the configured threshold.

Configuring IPv6 Multicast Group Replacement

For some special reasons, the number of IPv6 multicast groups passing through a switch or port may
exceed the number configured for the switch or the port. In addition, in some specific applications, an
IPv6 multicast group newly joined on the switch needs to replace an existing IPv6 multicast group
automatically. A typical example is "channel switching", namely, by joining the new multicast group, a
user automatically switches from the current IPv6 multicast group to the new one.
To address this situation, you can enable the IPv6 multicast group replacement function on the switch or
certain ports. When the number of IPv6 multicast groups a switch or a port has joined exceeds the limit.
If the IPv6 multicast group replacement is enabled, the newly joined IPv6 multicast group
automatically replaces an existing IPv6 multicast group with the lowest IPv6 address.
If the IPv6 multicast group replacement is not enabled, new MLD reports will be automatically
discarded.
Configuring IPv6 multicast group replacement globally
Follow these steps to configure IPv6 multicast group replacement globally:
To do...
Enter system view
Enter MLD Snooping view
Enable IPv6 multicast group
replacement
Use the command...
system-view
mld-snooping
overflow-replace [ vlan
vlan-list ]
1-17
Remarks
Required
Disabled by default

Hide quick links:

Advertisement

Chapters

Table of Contents
loading

Table of Contents