What is loop free topology?
A physical topology that contains switching or bridge loops is attractive for redundancy reasons, yet a switched network must not have loops. The solution is to allow physical loops, but create a loop-free logical topology using link aggregation, shortest path bridging or spanning tree protocol on the network switches.
What is topology free?
Free Topology (FT) is the most cost-effective, highest-performance solution for industrial wired networks compared to alternatives including RS-485 and Ethernet.
How do I tell if a Cisco switch has a loop?
Enable Loopback Detection on the Switch
- Enter your credentials and then click Log In.
- Click the Display Mode drop-down list and then choose Advanced.
- Choose Port Management > Loopback Detection Settings.
- Check the Loopback Detection Enable check box.
- Enter the Detection Interval value.
- Click Apply.
What are the topologies of a looped access layer?
Looped access topologies consist of a triangle and square design, as shown in Figure 6-3. In Figure 6-3, a VLAN is configured on each access switch on the corresponding 802.1Q uplink, and is also extended between aggregation switches, forming a looped topology for that VLAN.
How is the switched access topology different from the routed access topology?
The switched access topology uses trunks between the layers. In the routed access topology, the links use routed ports.The key differences between these topologies is the location of the layer-3 boundary. This affects other characteristics, such high-availability and traffic distribution.There are four access layer topology designs:
Are there any advantages to using Layer 2 loops?
The most obvious advantage is that there will not be any layer-2 loops. This means that there’s no need for spanning-tree to be blocking links. Having said that, don’t disable spanning-tree. It’s still needed in case someone were to connect two edge ports.
Which is the most widely implemented data center topology?
The triangle looped topology is currently the most widely implemented in the enterprise data center. This topology provides a deterministic design that makes it easy to troubleshoot while providing a high level of flexibility (see Figure 6-4 ).