User Manual

Configuring Switching
205
S3300 Smart Managed Pro Switch
Figure 93. Stack Configuration is Unavailable
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 Switchin
g > 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 Configuring
Interface Settings on p
age 32.
3. From
the Admin Mode list, select Enable.
4. In the Pde
lay Threshold field, specify the propagation delay threshold on the interface.
The threshold determines whether the port is capable of participating in the 802.1AS
p
rotocol. 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
valu
e of the allowed lost responses, a port is considered to not be exchanging peer delay
messages with its neighbor.
6. In the Initia
l Sync Interval field, specify the desired transmission rate of SYNC messages.
This value is the logarithm to the base 2 of th
e 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.
7. In the Pde
lay Interval field, specify the desired transmission rate of PDELAY_REQ
messages.
This value is the logarithm to the base 2 of th
e mean time interval between successive
PDELAY_REQ 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.