Netgear GS716Tv3 – ProSAFE 16-Port Gigabit Managed Switch 管理者ガイド
Configuring Switching
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GS716Tv3, GS724Tv4, and GS748Tv5 Smart Switches
The following table shows the non-configurable information on the 802.1AS Configuration
screen.
screen.
802.1AS Port Settings
Use the 802.1AS Port Settings screen to configure and view per-port 802.1AS settings.
To configure the 802.1AS port settings:
1.
Select Switching > 802.1AS
>
Advanced
>
802.1AS Port Settings.
2.
Select the ports to configure.
For information about how to select and configure one or more ports, see
3.
From the Admin Mode list, select Enable.
4.
In the Pdelay Threshhold field, specify the propagation delay threshold on the interface.
The threshold determines whether the port is capable of participating in the 802.1AS
protocol. If the propagation delay on the interface is above the threshold you configure,
the interface is not considered capable of participating in the 802.1AS protocol. The peer
delay must be less than the threshold value configured on the interface. The default value
is 2500 nanoseconds. The range is 0–1,000,000,000 ns.
protocol. If the propagation delay on the interface is above the threshold you configure,
the interface is not considered capable of participating in the 802.1AS protocol. The peer
delay must be less than the threshold value configured on the interface. The default value
is 2500 nanoseconds. The range is 0–1,000,000,000 ns.
5.
In the Allowed Lost Responses field, specify the allowed loss response value.
If the interface does not receive valid responses to PDELAY_REQ messages above the
value of the allowed lost responses, a port is considered to not be exchanging peer delay
messages with its neighbor.
value of the allowed lost responses, a port is considered to not be exchanging peer delay
messages with its neighbor.
6.
In the Initial Sync Interval field, specify the desired transmission rate of SYNC messages.
This value is the logarithm to the base 2 of the mean-time interval between successive
SYNC messages sent on this interface. The configured initial interval becomes the
current interval only after the port is initialized or re-initialized for 802.1AS operation.
SYNC messages sent on this interface. The configured initial interval becomes the
current interval only after the port is initialized or re-initialized for 802.1AS operation.
Table 47. 802.1AS global status
Field
Description
GrandMaster Present
Identifies whether Grand Master Clock is present. The default is False.
Best Clock Identity
The Best Clock Identity detected by this time-aware bridge.
Best Clock Priority1
The Priority1 value of the best clock on the switch.
Best Clock Priority2
The Priority2 value of the best clock on the switch.
Steps to Best Clock
The number of links in the path from the Best Clock to this time-aware
bridge. If this time-aware bridge is the best, the value is zero.
bridge. If this time-aware bridge is the best, the value is zero.
Local Clock Identity
The Clock Identity of this time-aware bridge.
Last GM Change Timestamp
The system time when the most recent grandmaster clock change
occurred.
occurred.