Basics Of Mvrp On Ex Series Switches; Mvrp Registration Modes; Mrp Timers - Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual

Complete Software Guide for Junos

Basics of MVRP on EX Series Switches

MVRP Registration Modes

MRP Timers

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OS for EX Series Ethernet Switches, Release 10.4
MVRP stays synchronized using these PDUs. The MVRP PDUs are sent to other switches
on the network only when an MVRP state change occurs. The switches in the network
participating in MVRP receive these PDUs during state changes and update their MVRP
states accordingly. MVRP timers dictate when PDUs can be sent and when switches
receiving MVRP PDUs can update their MVRP information.
VLAN information is distributed as part of the MVRP message exchange process and
can be used to dynamically create VLANs, which are VLANs created on one switch and
propagated to other switches as part of the MVRP message exchange process. Dynamic
VLAN creation using MVRP is enabled by default but can be disabled.
As part of ensuring that VLAN membership information is current, MVRP removes switches
and interfaces from the VLAN information when they become unavailable. Pruning VLAN
information has these benefits:
Limits the network VLAN configuration to active participants only, reducing network
overhead.
Targets the scope of broadcast, unknown unicast, and multicast (BUM) traffic to
interested devices only.
MVRP is disabled by default on all EX Series switches. You can configure MVRP on EX
Series switch interfaces to participate in MVRP for the switching network. MVRP can only
be enabled on trunk interfaces, and dynamic VLAN configuration through MVRP is enabled
by default when MVRP is enabled.
The MVRP registration mode defines whether an interface does or does not participate
in MVRP.
The following MVRP registration modes are configurable:
forbidden—The interface does not register and does not participate in MVRP.
normal—The interface accepts MVRP messages and participates in MVRP. This is the
default registration mode setting.
MVRP registration and updates are controlled by timers that are part of the MRP protocol.
These timers are set on a per-interface basis and define when MVRP PDUs can be sent
and when MVRP information can be updated on a switch.
The following timers are used to control the operation of MVRP:
Join timer—Controls the interval for the next MVRP PDU transmit opportunity.
Leave timer—Controls the period of time that an interface on the switch waits in the
Leave state before changing to the unregistered state.
Copyright © 2010, Juniper Networks, Inc.