Nortel BES50GE-12T PWR User Manual page 66

66 BES50 advanced features configuration
Variable
Priority
When the Switch Becomes Root
Hello Time
Maximum Age
Forward Delay
Advanced
Path Cost Method
Transmission Limit
Copyright © 2006, Nortel Networks
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Value
Type the bridge priority used in selecting the root device, root port,
and designated port. The device with the highest priority becomes
the STA root device. However, if all devices have the same
priority, the device with the lowest MAC address becomes the root
device. Lower numeric values indicate higher priority. (Default:
32 768. Range: 0 to 61 440 in increments of 1 for 802.1D format,
or increments of 4 096 for 802.1t format. Options for 802.1t format:
0, 4 096, 8 192, 12 288, 16 384, 20 480, 24 576, 28 672, 32 768,
36 864, 40 960, 45 056, 49 152, 53 248, 57 344, 61 440)
Type the interval (in seconds) at which this device transmits a
configuration message. (Default: 2. Minimum: 1. Maximum: The
lower of 10 or [{Max. Message Age / 2} -1])
Type the maximum time (in seconds) a device can wait
without receiving a configuration message before attempting to
reconfigure. All device ports (except for designated ports) should
receive configuration messages at regular intervals. Any port
that ages out STA information (provided in the last configuration
message) becomes the designated port for the attached Local
Area Network (LAN). If it is a root port, a new root port is selected
from among the device ports attached to the network. (In this
instance, the term ports refers to both ports and trunks.) (Default:
20. Minimum: The higher of 6 or [2 x {Hello Time + 1}]. Maximum:
The lower of 40 or [2 x {Forward Delay—1}])
Type the maximum time (in seconds) the device waits before
changing states. (For example, changing from discarding to
learning to forwarding). 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 can cause it to return to a discarding state resulting in
temporary data loops. (Default: 15. Minimum: The higher of 4 or
[{Max. Message Age / 2} + 1]. Maximum: 30)
Select the best path between devices. (Default: Long)
This option determines the range of values that can be assigned
to each interface:
• Long: Specifies 32-bit based values ranging from 1 to
200 000 000.
• Short: Specifies 16-bit based values ranging from 1 to 65 535.
Type the minimum interval between the transmission of
consecutive protocol messages. This is the maximum
transmission rate for Bridge Protocol Data Units (BPDUs).
(Range: 1 to 10. Default: 3.)
SMB
Using the Nortel Business Ethernet Switch 50 Series
NN47924-301 01.01 Standard
1.00 October 2006
Nortel Networks Confidential