User`s guide

45
Related CLI Commands
Entity Instance Parameter Values
Equivalent Web
Parameter
stp 0 enable on, off Enable RSTP
stp 0 prio 0 – 65535 Priority
stp 0 group - Group
stp 0 debug 0, 1
Not available on the WEB
interface.
Port status
To view the status of RSTP/STP on a router’s Ethernet ports, the following commands can
be used.
stp show
Port 0, Designated, Forwarding ctrl2:0x6
Port 1, Backup, Discarding ctrl2:0x1
Port 2, Backup, Discarding ctrl2:0x1
Port 3, Disabled, Discarding ctrl2:0x1
The port roles are
Disabled There is nothing physically connected to this Ethernet port.
Root A forwarding port that has been elected for the spanning-tree topology,
towards the root bridge.
Designated A forwarding port for every LAN segment, away from the root bridge.
Alternate An alternate path to the root bridge. This path is different than using
the root port.
Backup
A backup/redundant path to a segment where another bridge port
already connects.
The STP port states are:
Disabled The port is not functioning and cannot send or receive data.
Listening The port is sending and receiving BPDU's and participates in the
election process of the root bridge. Ethernet frames are discarded.
Learning The port does not yet forward frames but it does learn source
addresses from frames received and adds them to the MAC address
table.
Forwarding The port receiving and sending data, normal operation. STP still
monitors incoming BPDU’s that would indicate it should return to the
blocking state to prevent a loop.