4.6.5.58 <RSTP [A..E] HELLO [2..10]> Command
This command selects time interval between two consecutive RSTP service messages in
seconds. It means that BPDU packets will be send every HELLO time. Default value is 2 seconds.
4.6.5.59 <RSTP [IFACE] FWD [4..30]> Command
This command defines forwarding delay in seconds. Depending on the port role: Edge or Not-
edge, designated port changes its status according to the following sequence:
For Non-edge ports, i.e. for ports connected to other RSTP-enabled devices:
• Discarding - port discards incoming traffic
o Forwarding Delay (in seconds)
• Learning - port learns information about peer (MAC, RSTP priority, etc.)
o Forwarding Delay (in seconds)
• Forwarding - port forwards traffic
Forwarding Delay implies delay between port status change in sequence. Device will be ensured
that the link is valid and stable before enabling traffic forwarding on a port.
For Edge ports, i.e. for ports connected to PCs, servers and other terminal devices that don’t
support RSTP:
• Discarding - port discards incoming traffic
• Forwarding - port forwards traffic
Edge ports must be switched very fast to prevent traffic lost. Forwarding Delay is not applicable
in this mode. Port switches its state from Discarding to Forwarding state without Learning phase.
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