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Advanced Configuration
information about an attribute, the entity sends a Leave message. The entity
receiving the message starts Leave timer. If receiving no Join message
before the timer expires, then the entity receiving the message cancels the
information about the attribute.
 LeaveAll Timer: As a GARP application entity starts, it starts LeaveAll timer.
When the timer expires, the entity sends a LeaveAll message, so that the
other GARP application entities re-register all the attributes. Then the entity
starts LeaveAll timer again for the new cycle.
6.21.2 GMRP
The GARP Multicast Registration Protocol (GMRP) is a multicast registration
protocol based on GARP. It is used for maintaining the multicast registration
information of switches. All GMRP-enabled switches can receive multicast
registration information from other switches, update local multicast registration
information dynamically, and distribute local multicast registration information
to other switches. This information exchange mechanism ensures the
consistency of multicast information maintained by all GMRP-enabled switches
on a network.
If a switch or terminal wants to join or leave a multicast group, then the
GMRP-enabled port broadcasts the information to all the ports in the same
VLAN.
6.21.3 Description
Agent port: indicates the port on which GMRP and the agent function are
enabled.
Propagation port: indicates the port on which only GMRP is enabled, but not
the agent function.
Dynamically learned GMRP multicast entry and agent entry are forwarded by
the propagation port to the propagation ports of the lower-level devices.
All GMRP timers on the same network must keep consistent to prevent mutual
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