147
Port priority
128
Port cost
0
Bridge Priority
32,768
User-Changeable STA Parameters
The Switch’s factory default setting should cover the majority of installations. However, it is advisable to keep the default settings as
set at the factory; unless, it is absolutely necessary. The user changeable parameters in the Switch are as follows:
Priority
– A Priority for the switch can be set from 0 to 65535. 0 is equal to the highest Priority.
Hello Time
– The Hello Time can be from 1 to 10 seconds. This is the interval between two transmissions of BPDU packets sent by
the Root Bridge to tell all other Switches that it is indeed the Root Bridge. If you set a Hello Time for your Switch, and it is not the
Root Bridge, the set Hello Time will be used if and when your Switch becomes the Root Bridge.
The Hello Time cannot be longer than the Max. Age; otherwise, a configuration error will
occur.
Max. Age
– The Max Age can be from 6 to 40 seconds. At the end of the Max Age, if a BPDU has still not been received from the
Root Bridge, your Switch will start sending its own BPDU to all other Switches for permission to become the Root Bridge. If it turns
out that your Switch has the lowest Bridge Identifier, it will become the Root Bridge.
Forward Delay Timer
– The Forward Delay can be from 4 to 30 seconds. This is the time any port on the
Switch spends in the listening state while moving from the blocking state to the forwarding state.
Observe the following formulas when setting the above parameters:
Max. Age _ 2 x (Forward Delay - 1 second)
Max. Age _ 2 x (Hello Time + 1 second)
Port Priority
– A Port Priority can be from 0 to 240. The lower the number, the greater the probability the port will be chosen as the
Root Port.
Port Cost
– A Port Cost can be set from 0 to 200000000. The lower the number, the greater the probability the port will be chosen to
forward packets.
3. Illustration of STP
A simple illustration of three switches connected in a loop is depicted in the below diagram. In this example, you can anticipate some
major network problems if the STP assistance is not applied.
If switch A broadcasts a packet to switch B, switch B will broadcast it to switch C, and switch C will broadcast it to back to switch A
and so on. The broadcast packet will be passed indefinitely in a loop, potentially causing a network failure. In this example, STP
breaks the loop by blocking the connection between switch B and C. The decision to block a particular connection is based on the
Summary of Contents for NS3702-24P-4S
Page 1: ...NS3702 24P 4S User Manual P N 1072832 REV 00 01 ISS 14JUL14 ...
Page 102: ...102 Figure 4 5 4 LACP Port Configuration Page Screenshot ...
Page 119: ...119 Figure 4 6 4 VLAN Membership Status for Static User Page Screenshot ...
Page 124: ...124 Figure 4 6 6 Private VLAN Membership Configuration page screenshot ...
Page 140: ...140 Figure 4 6 21 Group Name to VLAN Mapping Table Page Screenshot ...
Page 164: ...164 Figure 4 8 2 Multicast Flooding ...
Page 184: ...184 Figure 4 8 15 MLD Snooping Port Group Filtering Configuration Page Screenshot ...
Page 204: ...204 Figure 4 9 6 QoS Egress Port Tag Remarking Page Screenshot ...
Page 209: ...209 QoS Class QoS Class value can be any of 0 7 DPL Drop Precedence Level 0 1 ...
Page 251: ...251 Figure 4 11 3 Authentication Method Configuration Page Screenshot ...
Page 286: ...286 Figure 4 11 11 RADIUS Server Configuration Screenshot ...
Page 290: ...290 Figure 4 11 17 Add User Properties Screen Figure 4 11 18 Add User Properties Screen ...
Page 298: ...298 non committed changes will be lost ...
Page 349: ...349 Figure 4 16 2 PoE Configuration Screenshot ...