If one link in EtherChannel goes down, the bandwidth of the EtherChannel will be automatically updated, and thus the STP cost will change as well. On Layer 3 switches, you can convert switched ports to routed ports.
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What will happen if one port in an EtherChannel is configured?
If one link in EtherChannel goes down, the bandwidth of the EtherChannel will be automatically updated, and thus the STP cost will change as well. On Layer 3 switches, you can convert switched ports to routed ports.
How many ports we can Bundled in EtherChannel?
Each EtherChannel can consist of up to eight compatibly configured Ethernet ports. All ports in each EtherChannel must be configured as either Layer 2 or Layer 3 ports. The number of EtherChannels is limited to 48.
Can an EtherChannel create switching loops?
It is a commonly seen and practically proven issue that if two switches are interconnected by a number of parallel links which are bundled into an Etherchannel on one switch (obviously using the on mode) while being unbundled on the second switch, a Layer2 loop may well be created.
What is port channel vs EtherChannel?
Port channel vs Etherchannel –
| PARAMETER | PORT CHANNEL | ETHERCHANNEL |
|---|---|---|
| Cisco’s way of distinguishing | Port-channel is the name of Cisco’s virtual interface for the purpose of Link aggregation | Etherchannel is a term used by Cisco to describe a link aggregation |
What is EtherChannel configuration?
Understanding EtherChannel Feature EtherChannel allows multiple physical Ethernet links to be combined into one logical link. If a segment within an EtherChannel fails, traffic previously carried over the failed link switches to the remaining segments with in the EtherChannel.
How do you configure EtherChannel?
Perform these steps to configure the EtherChannel feature on Cisco 1900, 2900 and 3900 series ISRs. Enters global configuration mode. Specify the EtherChannel (port channel) logical interface, and enter interface configuration mode. Assign an IP address and subnet mask to the EtherChannel.
What is the difference between EtherChannel and port-channel?
EtherChannel terminologies Spanning Tree Protocol – Is a data link layer protocol that prevents loops in networks with redundant links. Port-Channel – This refers to communication links between switches that combine multiple ethernet ports bandwidth into a single logical link.
What is the difference between EtherChannel and port channel?
What is the difference between LACP active and passive?
LACP runs on any link that is configured to be in the active state. The port in an active mode also automatically initiates negotiations with other ports by initiating LACP packets. Passive mode—the interface is not in an active negotiating state. LACP runs on any link that is configured in a passive mode.
What are two requirements to be able to configure an EtherChannel between two switches?
What are two requirements to be able to configure an EtherChannel between two switches? All the interfaces need to work at the same speed. All the interfaces need to be working in the same duplex mode.
Is EtherChannel a Layer 2 or 3?
A layer 3 etherchannel is similar to an interface on a router. The switch won’t “switch” traffic on this interface but route it. Because it’s a layer 3 interface, we configure an IP address on it. Before we configure the port channel settings you need to make sure that all interfaces have the exact same configuration.
What is EtherChannel and how it works?
EtherChannel – A port-channel architecture that groups together multiple physical Ethernet links into a single logical link that provides fault-tolerant, high-speed, and redundant links between switches and other network devices.
Can LACP and PAgP work together?
Port Aggregation Protocol (PAgP) has two Channel modes and they are “Desirable” and “Auto”. Link Aggregation Control Protocol (LACP) has two Channel modes and they are “Active” and “Passive”….Link Aggregation Control Protocol (LACP)
| Active | Passive | |
|---|---|---|
| Active | Yes | Yes |
| Passive | Yes | No |
What is the difference between LACP and PAGP?
LACP is open standard and supported by most of vendors, while PAGP is Cisco proprietary only used between Cisco devices. Besides, LACP can support cross-stack, while PAGP does not since it does not support participating interfaces on different physical switches.