SMC Networks TigerSwitch 10/100 SMC6724L2, Management Manual

Page: 53 / 176

D
EVICE
C
ONTROL
M
ENU
2-39
Forward Delay 1 The maximum time (in seconds) the root device
will wait before changing states (i.e., 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 Disabled GARP Multicast Registration Protocol (GMRP)
allows network devices to register endstations
with multicast groups.
If GMRP is globally enabled for the switch, then
you can individually enable or disable GMRP for
a specific port. See “VLAN Port Configuration”
on page 2-43.
IGMP and IGMP Snooping also provide
multicast filtering. (See “IGMP Protocol” on page
4-10.)
Parameter Default Description