Brocade Mobility RFS Controller System Reference Guide (Supporting software release 5.5.0.0 and later) - Manual (Page 976)

964 Brocade Mobility RFS Controller System Reference Guide
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NTP Association
Network Time
The interaction between the Access Point and an NTP server constitutes an association. NTP
associations can be either peer associations (the Access Point synchronizes to another system or
allows another system to synchronize to it), or a server associations (only the Access Point
synchronizes to the NTP resource, not the other way around).
To view the Access Point’s NTP association statistics:
1. Select the Statistics menu from the Web UI.
2. Select System from the navigation pane (on the left-hand side of the screen). Expand a RF
Domain, select a controller or service platform, and select one of its connected Access Points.
3. Select Network Time and expand the menu to reveal its sub menu items.
4. Select the NTP Association tab.
FIGURE 158 Access Point - NTP Association screen
Root Delay The total round-trip delay in seconds. This variable can take on both positive and negative values,
depending on relative time and frequency offsets. The values that normally appear in this field range
from negative values (a few milliseconds) to positive values (several hundred milliseconds).
Root Dispersion The difference between the time on the root NTP server and its reference clock. The reference clock is
the clock used by the NTP server to set its own clock.
Stratum Displays how many hops the Access Point is from its current NTP time resource.
Refresh Select the Refresh button to update the screen’s statistics counters to their latest values.