Planet Technology WGS3-404 - Manual (Page 56)

WGS3 Layer 3 Switch User’s Manual - 48 -
Forward Delay 15 The maximum time (in seconds) the root device will wait before
changing states (that is, listening to learning to forwarding). This delay
is required because every device must receive information about
topology changes before it starts to forward frames. In addition, each
port needs time to listen for conflicting information that would make it
return to a blocking state; otherwise, temporary data loops might result.
The maximum value is 30.
The minimum value is the higher of 4 or
[(Max. Message Age / 2) + 1].
Max (Message)
Age
20 The maximum time (in seconds) a device can wait without receiving a
configuration message before attempting to reconfigure. All device
ports (except for designated ports) should receive configuration
messages at regular intervals. Any port that ages out STA information
(provided in the last configuration message) becomes the designated
port for the attached LAN. If it is a root port, a new root port is selected
from among the device ports attached to the network.
The minimum value is
the higher of 6 or [2 x (Hello Time + 1)].
The maximum value is
the lower of 40 or [2 x (Forward Delay - 1)].
GMRP *1 Disabled GARP Multicast Registration Protocol (GMRP) allows network devices
to register end stations with multicast groups. If GMRP is globally
enabled for the switch, then you can individually enable or disable
GMRP for a specific port. See “4.5.4.1 VLAN Port Configuration”.
IGMP and IGMP Snooping also provide multicast filtering. For
multilayer mode, the full IGMP protocol set is automatically
enabled/disabled along with DVMRP. (See “6.4.2 IGMP Protocol”,and
“4.5.5 Configuring IGMP Snooping”.)
GVRP Disabled GARP VLAN Registration Protocol (GVRP) defines a way for switches
to exchange VLAN information in order to register VLAN members on
ports across the network. This function should be enabled to permit
automatic VLAN registration, and to support VLANs which extend
beyond the local switch.
If GVRP is globally enabled for the switch, then you can individually
enable or disable GVRP for a specific port. See “4.5.4.1 VLAN Port
Configuration”.
Priority
Threshold *1
4 WGS3-2620 supports Quality of Service (QoS) by using two priority
queues, with Weighted Fair Queuing for each port. Up to 8 separate
traffic classes are defined in IEEE 802.1p. So any packets with a
priority equal to or higher than this threshold are placed in the high
priority queue. You can use “4.5.4.1 VLAN Port Configuration” to
configure the default priority for each port.