EnGenius EGS7228P User Manual download pdf (Page 48)

Enter the information to set up CIST for the Switch:

Priority:

Select from the list to specify the priority

of the Switch for comparison in the CIST.

CIST priority is an important criterion on

determining the root bridge. In the same

condition, the Switch with the highest

priority will be chosen as the root bridge. A

lower value has a higher priority. The default

valueis:32768andshouldbeanexact

divisor of 4096.

Maximum Hop:

Used to set the number of hops between

devices in a spanning tree region before the

BPDU packet sent by the Switch is discarded.

Each Switch on the hop count will reduce

the hop count by one until the value reaches

zero. The Switch will then discard the BDPU

packet and the information held for the port

will age out. The user may set a hop count

from 6 to 40. The default value is: 20.

Forward Delay:

Enter the bridge forward delay time, which

indicates the amount of time in seconds that

a bridge remains in a listening and learning

state before forwarding packets. The value

must be greater or equal to (Bridge Max

Age/2) + 1. The time range is from 4 seconds

to 30 seconds. The default value is 15

seconds.

Maximum Age:

The Max Age may be set to ensure that old

information does not endlessly circulate

through redundant paths in the network,

preventing the effective propagation of new

information. Set by the Root Bridge, this

value will aid in determining that the Switch

hasspanningtreecongurationvalues

consistent with other devices on the bridged

LAN. The user may choose a time between

6 and 40 seconds. The default value is: 20

seconds

TX Hold Count:

Enter the maximum number of Hello packets

transmitted per interval. The count can be

speciedfrom1to10.Thedefaultis:6.

Hello Time:

Enter the Switch’s Hello Time. This is the

interval between two transmissions of BPDU

packets sent by the Root Bridge to verify

that it is the Root Bridge. The Hello Time

range is from 1 to 10 seconds. The default

Hello Time is: 2 seconds.

Apply: Click APPLY to update the the system settings.

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EnGenius EGS7228P User Manual Page 48

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