KYLAND Technology SICOM3024P, Web Operation Manual

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Advanced Configuration
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JoinIn message before Join timer expires, the entity sends the Join message again. If
receiving a JoinIn message before the timer expires, the entity does not send the second
Join message.

Leave Timer : When a GARP application entity wants to cancel the 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 interference.