PWVIA RM P12 Ethernet Switches - Manual
July 2021
68
The IGMP Querier establishes a table of active multicast groups by querying connected devices about which multicast
groups each device wishes to join. For example, a gateway will request the multicast groups associated with the sACN
universes that the gateway is patched to.
Each switch operating an IGMP Querier on a VLAN must have valid IP settings on that VLAN. The IP settings may be static
or dynamically established using the DHCP.
IMPORTANT
: Two IGMP queriers should be active on each VLAN using multicast filtering. If no querier is active, the
groupings table will fail after approximately five minutes and filtering will only work erratically or will fail altogether. IGMP
should not be enabled on more than four VLANs per switch.
The IGMP Snooper allows the switch to more efficiently route multicast traffic by applying the multicast groupings as a filter.
Multicast traffic is only directed to only those ports, i.e. end devices, that have requested to receive that traffic.
The Current Multicast Groups is a list of the multicast addresses currently maintained in the Querier’s table. The list provides
a troubleshooting check. Click on a listed group to see what ports are requesting that address. For example, the multicast
groups 239.255.237.1, 239.255.237.2 and 239.255.237.255 indicate traffic between Pathport devices, and all ports
connected to Pathports (on that VLAN) should be shown.
RING PROTECT SETUP
VIA ring protection configured here enables
EAPS
. This automatic protection system can detect a break in the ring and heal
it in milliseconds. Once your network has been setup and is stable, for speedy redundancy during show situations, it is best
to use EAPS vs RSTP (see below for RSTP setup). This option will only be shown if VLAN support is enabled.
WARNING
: Ring Protection should only be configured and enabled after all other VLAN configuration has been completed.
Ring Protect Setup
Ring Protect Mode: Disabled
Primary Port: 13
Secondary Port: 14
Control VLAN: 4095
<Save and Apply>
<Discard Changes>
Menu Item
Description
Ring Protect Mode
Shows the current state of the switch. Press knob to change between:
Disabled (Default)
: Ring Protection feature is turned off.
Master
: Set switch as the Master. Only one switch should be set as Master. All other
switches should be set as Transit switches.
Transit
: Set switch as a Transit switch.
Primary Port: <x>
Designates which port to use as the active uplink port to other switches. Valid range is
the
last four ports of the switch.
Secondary Port: <x>
Designates which port to use as the fall-back link to other switches. Valid range is
the last
four ports of the switch.
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