iES20G/iES18G
Series User’s Manual
iS5 Communications Inc.
86
interval between
messages the RSTP
receives from the root
switch. If a switch does
not receive a bridge
protocol data unit (BPDU)
message from the root
switch within this interval,
the RSTP topology is
recomputed.
RSTP hello-time
[seconds]
G
Use the RSTP hello-time
global configuration
command to specify the
interval (1-10) between
hello bridge protocol data
units (BPDUs).
switch(config)#
RSTP hello-time 3
RSTP forward-time
[seconds]
G
Use the RSTP
forward-time global
configuration command
to set the
forwarding-time for the
specified RSTP instances.
The forwarding time
(4-30) determines how
long each of the listening
and learning states last
before the port begins
forwarding.
switch(config)# RSTP forward-time 20
RSTP max-age
[seconds]
G
Configure RSTP max age
parameter
switch(config)# RSTP max-age 25
RSTP path-cost
[1to200000000]
I
Use the RSTP cost
interface configuration
command to set the path
cost for RSTP calculations.
In the event of a loop,
RSTP considers the path
cost when selecting
an interface to place into
switch(config)#interface fastEthernet 2
switch(config-if)#
rstp path-cost 2
