Chapter 13 Spanning Tree Protocol
MES3500 Series User’s Guide
129
The following table describes the labels in this screen.
Table 36
Advanced Application > Spanning Tree Protocol > MSTP
LABEL
DESCRIPTION
Port
Click
Port
to display the
MSTP Port Configuration
screen (see
Status
Click
Status
to display the
MSTP Status
).
Active
Select this check box to activate MSTP on the Switch. Clear this checkbox to disable MSTP
on the Switch.
Note: You must also activate
Multiple Spanning Tree
in the
Advanced Application >
Spanning Tree Protocol > Configuration
screen to enable MSTP on the Switch.
Hello Time
This is the time interval in seconds between BPDU (Bridge Protocol Data Units)
configuration message generations by the root switch. The allowed range is 1 to 10
seconds.
MaxAge
This is the maximum time (in seconds) a switch can wait without receiving a BPDU before
attempting to reconfigure. All switch ports (except for designated ports) should receive
BPDUs at regular intervals. Any port that ages out STP information (provided in the last
BPDU) becomes the designated port for the attached LAN. If it is a root port, a new root
port is selected from among the Switch ports attached to the network. The allowed range
is 6 to 40 seconds.
Forwarding Delay This is the maximum time (in seconds) a switch will wait before changing states. This
delay is required because every switch 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 allowed range is 4 to 30 seconds. As a general
rule:
Note: 2 * (Forward Delay - 1) >= Max Age >= 2 * (Hello Time + 1)
Maximum hops
Enter the number of hops (between 1 and 255) in an MSTP region before the BPDU is
discarded and the port information is aged.
Configuration
Name
Enter a descriptive name (up to 32 characters) of an MST region.
Revision Number
Enter a number to identify a region’s configuration. Devices must have the same revision
number to belong to the same region.
Apply
Click
Apply
to save your changes to the Switch’s run-time memory. The Switch loses
these changes if it is turned off or loses power, so use the
Save
link on the top navigation
panel to save your changes to the non-volatile memory when you are done configuring.
Cancel
Click
Cancel
to begin configuring this screen afresh.
Instance
Use this section to configure MSTI (Multiple Spanning Tree Instance) settings.
Instance
Enter the number you want to use to identify this MST instance on the Switch. The Switch
supports instance numbers 0-64.
Bridge Priority
Set the priority of the Switch for the specific spanning tree instance. The lower the
number, the more likely the Switch will be chosen as the root bridge within the spanning
tree instance.
Enter priority values between 0 and 61440 in increments of 4096 (thus valid values are
4096, 8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864, 40960, 45056, 49152,
53248, 57344 and 61440).
Содержание MES3500 Series
Страница 16: ...Table of Contents MES3500 Series User s Guide 16 Appendix C Legal Information 357 Index 362...
Страница 17: ...17 PART I User s Guide...
Страница 72: ...72 PART II Technical Reference...
Страница 106: ...Chapter 9 VLAN MES3500 Series User s Guide 106 Figure 49 Advanced Application VLAN Port Based VLAN Setup Port Isolation...
Страница 178: ...Chapter 22 Policy Rule MES3500 Series User s Guide 178 Figure 98 Policy Example EXAMPLE...
Страница 360: ...Appendix C Legal Information MES3500 Series User s Guide 360 Environmental Product Declaration...
