What is spanning-tree port type edge trunk?

Spanning Tree Edge Ports Edge ports, which are connected to hosts, can be either an access port or a trunk port. The edge port interface immediately transitions to the forwarding state, without moving through the blocking or learning states.

What is spanning-tree port type normal?

The default spanning tree port type is normal. Edge ports, which are connected to Layer 2 hosts, can be either an access port or a trunk port. If you configure a port connected to a Layer 2 switch or bridge as an edge port, you might create a bridging loop.

What is spanning-tree port type network do?

When you use the no spanning-tree port type command, the software returns the port to the global default setting for network port types. You can configure all ports that are connected to switches as spanning tree network ports by default by entering the spanning-tree port type network default command.

What is edge port mode?

Information. A port is considered as an edge port when it is directly connected to the user terminal or server, instead of any other switches or shared network segments. The edge port will not cause a loop upon network topology changes.

What is spanning tree PortFast trunk?

spanning-tree portfast allows the ports to skip the blocking to fowarding states and go immediately to forwarding. The spanning-tree portfast trunk does the same but for trunk connections.

Can a spanning tree have cycles?

Since “a spanning tree covers all of the vertices”, it cannot be disconnected. A spanning tree cannot have any cycles and consist of (n−1) edges (where n is the number of vertices of the graph) because “it uses the minimum number of edges​”.

What is Loop Guard?

The loop guard feature checks if a root port or an alternate root port receives BPDUs. If the port is receiving BPDUs, the loop guard feature puts the port into an inconsistent state until it starts receiving BPDUs again.

What is spanning tree with example?

A minimum spanning tree is a special kind of tree that minimizes the lengths (or “weights”) of the edges of the tree. An example is a cable company wanting to lay line to multiple neighborhoods; by minimizing the amount of cable laid, the cable company will save money. A tree has one path joins any two vertices.

Is Spanning Tree Protocol still used?

Spanning Tree Protocol (STP) is dead, or at least it should be. STP still only has one focal point (root) and can only have one forwarding path toward that one device. Yes, we can use technologies like EtherChannel to help hide portions of the topology for STP, but STP does NOT do multipath forwarding!

Can we enable PortFast on trunk ports?

However, PortFast can be enabled on the trunk ports by selecting the Trunk check box in the WebUI.

What are the RSTP port states?

RSTP can be described by three port states: Discarding, Learning, and Forwarding. The Disabled, Blocking, and Listening states described by STP have been combined into the Discarding state in RSTP.

Does spanning tree work on trunk ports?

The PortFast feature is enabled at a port level, and this port can either be a physical or a logical port. When PortFast feature is enabled on a switch or a trunk port, the port immediately transitions to the STP forwarding state. Though PortFast is enabled the port still participates in STP.

Can a spanning tree trunk be an edge port?

On an access port, both spanning-tree portfast and spanning-tree portfast trunk cause the port to act as a PortFast-enabled (i.e. edge) port. Such a port will immediately become Forwarding after coming up.

Which is the spanning-tree port type for VPC?

Hi Ajay, It is recommended that switch-to-switch links are configured with the spanning-tree port type normalcommand. The one exception is the vPC peer-link which is recommended to configure with the spanning-tree port type networkcommand.

Is there such a thing as spanning-tree portfast?

First of all PortFast is Cisco proprietary. For STP, yes. For RSTP, no – it is the edge port that is, for backward compatibility reasons, configured as spanning-tree portfast.

Are there any issues with the Spanning Tree Protocol?

In the last week I talked to two different customers about issues with their port‐channels, vPCs, and Spanning‐Tree Protocol. The first customer thought he had a STP issue between his N7Ks and his N5Ks, but he actually had VPC design issue.

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