We have two Cisco switches to be configured with PAgP. We can see both local and neighbor interface information, and also the Cisco PAgP mode used. Skip to content. C - Device is in Consistent state. The short definition of EtherChannel is multiple physical switch interfaces, bundled together, behaving for all intents and purposes as one logical interface. So what is necessary to pull this off?
Simply, you run more connections between your existing physical devices, and then configure those interfaces to appear as a single interface. In the world of STP, this new interface looks like only one interface. From the routing protocols perspective, it looks like one high-speed path between the devices, so the routing protocol would choose to use it. In the real world, when the routing protocol sends traffic over the bundle, the traffic is spread across all the physical ports. And here is maybe the best part.
In the world of redundancy, if at least one of the physical interfaces is still active, the overall Etherchannel appears to be active. So at that 4 a. So what is required to pull this off? All you need in your current network is to have some extra interfaces on your switches, and a cable to run between them. The configuration is simple, and you immediately have that speed and redundancy you wanted, without breaking the budget. Next up we are going to look at the configuration and some background technical information of different EtherChannel types.
The first step is assigning the physical interfaces to the Etherchannel, with different keywords indicating which protocol is to be used. You would then do the same config on SW2, just with the different port numbers. So what did that do? First, you grabbed the physical interfaces with the range command, then added them to the.
Etherchannel using the channel-group command. This is a copy action and not a link, so if the settings are changed after the fact, it is required to change the settings on all ports. On EtherChannel Forces the connection to bring all links up without using a protocol to negotiate connections. This mode can only connect to another device that is also set to on. The basic process for configuring EtherChannel interfaces is as follows: Connect to the command-line interface CLI of the switch.
This connection may be via SSH, Telnet, or the console port. Switch1 configure terminal Access Interface Configuration mode. SO, if both ends are configured as auto, then link aggregation cannot be formed. But one of them is in desirable mode, then link aggregation is formed. Below, you can find the different cases of these PAgP modes. You can check also another PAgP Example. On first switch, we will configure each port as the member of our etherchannel.
In the first switch we will use PAgP Auto mode. This time, our mode will be PAgP desirable.
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