Troubleshooting Layer 3 EtherChannel
Chapter 5 discussed how to troubleshoot Layer 2 EtherChannels between Layer 2 switchports on Cisco Catalyst switches. When you have multiple routed ports on Layer 3 switches, you can bundle them together to create Layer 3 EtherChannels. This section focuses on the Layer 3 EtherChannel requirements and how you can successfully troubleshoot issues relating to it.
An EtherChannel logically combines the bandwidth of multiple physical interfaces into a logical connection between switches, as illustrated in Figure 6-8. Specifically, Figure 6-8 shows four Gigabit Ethernet routed ports logically bonded into a single EtherChannel link known as a port channel.
Figure 6-8 Layer 3 EtherChannel
Following are common ...
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