User Manual

Configure Switching Information
233
M6100, M5300, and M7100 Series Managed Switches
14. Select the BPDU Filter Disable or Enable radio button.
This specifies whether the BPDU Filter feature is enabled. STP BPDU filtering applies to
all operational edge ports. Edge Port in an operational state is supposed to be connected
to hosts that typically drop BPDUs. If an operational edge port receives a BPDU, it
immediately loses its operational status. In that case, if BPDU filtering is enabled on this
port then it drops the BPDUs received on this port.
15. Select the Fast Backbone Mode Disable or Enable radio button. (PVSTP only.)
Use this option to choose a new indirect link when an indirect link fails. The system does
not ignore inferior BPDUs, as is done in 802.1d. Rather the system uses the BPDUs to
age out on the port it received the BPDUs. Later the system sends out root link queries
on other non-designated ports. Based on the replies, if there is a positive response to at
least one of them, it chooses a new indirect link. Fast Backbone mode is disabled by
default.
16. Select the Fast Uplink Mode Disable or Enable radio button. (PVSTP only.)
This option reduces the recovery time in selecting a new root port when the primary root
port goes down. Fast Uplink mode is disabled by default.
17. Use the Max Update Rate field to configure the Fast Uplink Maximum Update Rate.
This field is enabled for configuration when Fast Uplink mode is enabled. Allowed values
are 0 to 32000 packets per second. The default value is 150.
18. Click the Apply button.
The updated configuration is sent to the switch. Configuration changes take effect
immediately.
The following table describes the nonconfigurable information displayed on the screen.
Table 86. STP Configuration
Field Description
Configuration Digest Key The 16-byte signature of type HMAC-MD5 created from the MST
Configuration Table (a VLAN ID-to-MST ID mapping) which is used to
identify the configuration currently being used.
Configuration Format Selector The version of the configuration format being used in the exchange of
BPDUs.
STP Status
MST ID Table consisting of the MST instances (including the CST) and the
corresponding VLAN IDs associated with each of them.
VID ID Table consisting of the VLAN IDs and the corresponding FID
associated with each of them.
FID ID Table consisting of the FIDs and the corresponding VLAN IDs
associated with each of them.