Cist Instance Setting - Planet GS-4210-24T4S User Manual

4.3.4.4 CIST Instance Setting

This Page allows you to configure CIST instance settings. The CIST Instance Setting and Information screens in
& Figure 4-3-62 appear.
The Page includes the following fields:
Object
• priority
• Max Hops
•
Forward Delay
•
Max Age
•
Tx Hold Count
Figure 4-3-61: CIST Instance Setting Page Screenshot
Description
Controls the bridge priority. Lower numeric values have better priority. The bridge
priority plus the MSTI instance number, concatenated with the 6-byte MAC
address of the switch forms a Bridge Identifier.
For MSTP operation, this is the priority of the CIST. Otherwise, this is the priority
of the STP/RSTP bridge.
This defines the initial value of remaining Hops for MSTI information generated at
the boundary of an MSTI region. It defines how many bridges a root bridge can
distribute its BPDU information. Valid values are in the range 6 to 40 hops.
The delay used by STP Bridges to transition Root and Designated Ports to
Forwarding (used in STP compatible mode). Valid values are in the range 4 to 30
seconds
-Default: 15
-Minimum: The higher of 4 or [(Max. Message Age / 2) + 1]
-Maximum: 30
The maximum age of the information transmitted by the Bridge when it is the
Root Bridge. Valid values are in the range 6 to 40 seconds.
-Default: 20
-Minimum: The higher of 6 or [2 x (Hello Time + 1)].
-Maximum: The lower of 40 or [2 x (Forward Delay -1)]
The number of BPDU's a bridge port can send per second.
User's Manual of GS-4210 Series
172
Figure 4-3-61