This command is not
supported on Cisco 7600 series routers that are configured with a Supervisor
tracking is supported only with Internet Group Management Protocol Version 3
When you enable
explicit host tracking and the Cisco 7600 series router is working in
proxy-reporting mode, the router may not be able to track all the hosts that
are behind a VLAN interface. In proxy-reporting mode, the Cisco 7600 series
router forwards only the first report for a channel to the router and
suppresses all other reports for the same channel.
With IGMPv3 proxy
reporting, the Cisco 7600 series router does proxy reporting for unsolicited
reports and reports that are received in the general query interval.
Proxy reporting is
turned on by default. When you disable proxy reporting, the Cisco 7600 series
router works in transparent mode and updates the IGMP snooping database as it
receives reports and forwards this information to the upstream router. The
router can then explicitly track all reporting hosts.
tracking disables fast-leave processing and proxy reporting.
explicit host tracking of membership information on any port. The explicit
host-tracking database is used for fast-leave processing for IGMPv3 hosts,
proxy reporting, and statistics collection. When you enable explicit host
tracking on a VLAN, the IGMP snooping software processes the IGMPv3 report that
it receives from a host and builds an explicit host-tracking database that
contains the following information:
The port that
is connected to the host.
that are reported by the host.
The filter mode
for each group that are reported by the host.
The list of
sources for each group that are reported by the hosts.
filter mode of each group.
The list of
hosts for each group that request the source.