Edge-Core ECS3510-26P Management Manual page 210

| Spanning Tree Algorithm
C 8
HAPTER
Configuring Global Settings for STA
Forward Delay – The maximum time (in seconds) this device will wait
◆
before changing states (i.e., discarding to learning to forwarding). This
delay is required because every device 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 discarding state; otherwise, temporary data loops might
result.
Default: 15
■
Minimum: The higher of 4 or [(Max. Message Age / 2) + 1]
■
Maximum: 30
■
RSTP does not depend on the forward delay timer in most cases. It is
able to confirm that a port can transition to the forwarding state
without having to rely on any timer configuration. To achieve fast
convergence, RSTP relies on the use of edge ports, and automatic
detection of point-to-point link types, both of which allow a port to
directly transition to the forwarding state.
Configuration Settings for MSTP
Max Instance Numbers – The maximum number of MSTP instances
◆
to which this switch can be assigned.
Configuration Digest – An MD5 signature key that contains the VLAN
◆
ID to MST ID mapping table. In other words, this key is a mapping of all
VLANs to the CIST.
Region Revision
◆ 4
Default: 0)
Region Name – The name for this MSTI. (Maximum length: 32
◆ 4
characters; switch's MAC address)
Max Hop Count – The maximum number of hops allowed in the MST
◆
region before a BPDU is discarded. (Range: 1-40; Default: 20)
Region Revision and Region Name and are both required to uniquely
N :
OTE
identify an MST region.
W I
EB NTERFACE
To configure global STA settings:
Click Spanning Tree, STA.
1.
Select Configure Global from the Step list.
2.
Select Configure from the Action list.
3.
4. The MST name and revision number are both required to uniquely identify an MST region.
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– The revision for this MSTI. (Range: 0-65535;