GarrettCom Magnum MNS-6K - Manual (Page 141)

M A G N U M 6 K S W I T C H E S , M N S - 6 K U S E R G U I D E
Root Bridge Forward Delay: indicates the designated root bridge’s forward delay. This is the
time the switch waits before it switches from the listening to the forwarding state. The default is
15 seconds. This value can be set between 4-30 seconds
Root Bridge Hello Time: indicates the designated root bridge’s hello time. Hello information is
sent out every 2 seconds
Root Bridge Max Age: indicates the designated root bridge’s maximum age – after which it
discards the information as being old and receives new updates
Topology Change count: since the last reboot, the number of times the topology has changed.
Use this in conjunction with “show uptime” to find the frequency of the topology changes
Time Since topology Change: number of seconds since the last topology change
Magnum6K25(rstp)##
show stp ports
RSTP Port Configuration
----------------------------------------------------------------------------------------------------------------
Port# Type Priority Path Cost State
Des. Bridge Des. Port
----------------------------------------------------------------------------------------------------------------
09 TP(10/100) 128 2000000 Forwarding 00:00:00:20:06:25:ed:89 00:09
10 TP(10/100) 128 2000000 Disabled
00:0a
11 TP(10/100) 128 2000000 Disabled 00:0b
12 TP(10/100) 128 2000000 Disabled 00:0c
13 TP(10/100) 128 200000 Forwarding 00:00:00:20:06:25:ed:89 00:0d
14 TP(10/100) 128 2000000 Disabled
00:0e
15 TP(10/100) 128 2000000 Disabled 00:0f
16 TP(10/100) 128 2000000 Disabled 00:10
Magnum6K25(rstp)##
F
IGURE
80 – Reviewing the RSTP port parameters
The variables listed by the “show stp config” command are:
Port#: indicates the port number. Value ranges from 01 to max number of ports in the switch
Type: indicates the type of port – TP indicates Twisted Pair
Priority: STP uses this to determine which ports are used for forwarding. Lower the number
means higher priority. Value ranges from 0 to 255. Default is 128
Path Cost: This is the assigned port cost value used for the switch to determine the forwarding
points. Values range from 1 to 2000000. Lower the value, lower the cost and hence the preferred
route. The costs for different Ethernet speeds are shown below. The Path cost in STP is
compared to the path cost in RSTP.
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