NETGEAR AV Line M4250 GSM4210PX 8-Port Gigabit PoE+ Compliant Managed AV Switch with SFP (220W) - Manual (Page 230)

The range is from 6 to 40 seconds, and the value must be less than or equal to the
following: (2 * Bridge Forward Delay) – 1 and greater than or equal to 2 * (Bridge
Hello Time +1).
The default is 20 seconds.
Note: The Bridge Hello Time (secs) field shows the fixed period in seconds that a
root bridge waits between configuration messages. The fixed period is 2 seconds.
8. In the Bridge Forward Delay (secs) field, specify the period in seconds that a bridge
remains in a listening and learning state before forwarding packets.
The period is form 4 to 30 seconds, and the value must be greater or equal to the
following: (Bridge Max Age / 2) + 1.
The default is 15 seconds.
9. In the Spanning Tree Maximum Hops field, specify the maximum number of bridge
hops that the information for a particular CST instance can travel before being
discarded.
The range is from 6 to 40 hops. The default is 20 hops.
10. In the Spanning Tree Tx Hold Count field, specify the maximum number of BPDUs
that the bridge can send within the hello time window.
The range is from 1 to 10. The default is 6.
11. Click the Apply button.
Your settings are saved.
12. To save the settings to the running configuration, click the Save icon.
The following table describes the nonconfigurable fields on the page.
Table 57. CST status information
Description Field
The bridge identifier for the CST, which consist of the bridge priority and
the base MAC address of the bridge. Bridge identifier
The time in seconds since the topology of the CST changed. Time Since Topology Change
The number of times the topology changed for the CST. Topology Change Count
This field shows if a topology change is in progress on any port assigned
to the CST. (True or False.) Topology Change
Main User Manual 230 Configure Switching Information
AV Line of Fully Managed Switches M4250 Series Main User Manual