What is Hello timer in RSTP?
In 802.1D BPDUs originate from the root bridge and are relayed by switches down the tree. So non-root bridges basically use the hello-time from the root to send bpdus. This is different with RSTP because each switch sends its own bdpus.
What is the convergence time of RSTP?
When default values are used for the maximum age (20 seconds) and forward delay (15 seconds), it takes 50 seconds for the device to converge. RSTP converges faster because it uses a handshake mechanism based on point-to-point links instead of the timer-based process used by STP.
What is Max age in RSTP?
The max age timer controls the maximum length of time that passes before a bridge port saves its configuration BPDU information. This time is 20 sec by default, but you can tune the time to be between 6 and 40 sec. The migrate time is the time after which a non-assigned port becomes designated.
How does RSTP protocol work?
RSTP defines three port states: discarding, learning, and forwarding and five port roles: root, designated, alternate, backup, and disabled. A RSTP capable switch determines what spanning tree will be computed by the algorithm, but the rules as written require knowledge of the entire network.
How many RSTP link types?
It will take a look at the link type and there are only two link types: Point-to-point (full duplex) Shared (half duplex)
How long is the Hello timer in spanning tree protocol?
Defaut Spanning Tree Protocol (STP) hello timer is 2 seconds. You can adjust Spanning Tree Protocol (STP) hello timer to any value between 1 and 10 sec. Click the following link to learn how to change the default Spanning Tree Protocol (STP) hello timer. The forward delay timer is the time interval that is spent in the listening and learning state.
What’s the Hello Time in Cisco bridge protocol?
Refer to Cisco Technical Tips Conventions for more information on document conventions. hello —The hello time is the time between each bridge protocol data unit (BPDU) that is sent on a port. This time is equal to 2 seconds (sec) by default, but you can tune the time to be between 1 and 10 sec.
How long is the max age timer on STP?
max age timer The max age timer controls the maximum length of time interval that a Spanning Tree Protocol (STP) Switch port saves its configuration Bridge Protocol Data Unit (BPDU) information. Default max age timer is 20 seconds. You can tune the Spanning Tree Protocol (STP) max age timer to any value between 6 and 40 sec.
How long is the forward delay in STP?
Default Spanning Tree Protocol (STP) forward delay timer is 15 seconds. You can adjust the Spanning Tree Protocol (STP) forward delay timer to any value between 4 and 30 seconds.