Can EtherChannel be configured on a router?
Routed port functionality can not be applied on Layer 2 EtherChannel, for example IP address can not be configured on Layer 2 EtherChannel. EtherChannel is to interconnect router, switches or servers with resiliency and load sharing across links.
How do I enable the trunk on my Cisco router?
To enable trunk links, configure the ports on either end of the physical link with parallel sets of commands. To configure a switch port on one end of a trunk link, use the switchport mode trunk command. With this command, the interface changes to permanent trunking mode.
Can an EtherChannel be configured with STP?
Spanning tree protocol (STP) can be used with an EtherChannel. STP treats all the links as a single one and BPDUs are only sent down one of the links. This is where an EtherChannel is most desirable, it allows use of all available links between two devices. EtherChannels can be also configured as VLAN trunks.
What is EtherChannel Cisco?
EtherChannel is a port link aggregation technology or port-channel architecture used primarily on Cisco switches. It allows grouping of several physical Ethernet links to create one logical Ethernet link for the purpose of providing fault-tolerance and high-speed links between switches, routers and servers.
How do I know if my port is trunk or access?
Use the show interfaces trunk command to check whether the local and peer native VLANs match. If the native VLAN does not match on both sides, VLAN leaking occurs. Use the show interfaces trunk command to check whether a trunk has been established between switches.
What is trunked VLAN?
VLAN trunking enables the movement of traffic to different parts of the network configured as a VLAN. A trunk is a point-to-point link between two network devices that carry more than one VLAN. With VLAN trunking, you can extend your configured VLAN across the entire network.
Do trunk ports need IP address?
The router needs to have an IP address/mask associated with each VLAN on the trunk. However, the router has only one physical interface for the link connected to the trunk.
What is the CISCO ISR 2921?
Their converged, secured branch infrastructure is built to deliver an optimal application experience on any device, any connection, from any cloud or data center. The Cisco 2921 Integrated Services Router (ISR) delivers highly secure data, voice, video, and application services for small offices. Key features include:
Does the 2921 show the EtherChannel configuration on the switch?
I believe that on the 2921, the show etherchannel summary would only display EtherChannels configured on added switching modules (EHWIC or SM). A Port-channel configured on top of routed ports is not displayed in this output – I have the same experience with 2811 running 15.3 (3)XB12 IOS.
Does the catalyst 2940/2955/2950 switch support ISL trunking?
The Catalyst 2940 and 2955/2950 switches do not support Inter-Switch Link Protocol (ISL) trunking due to hardware limitations. Cisco routers support EtherChannel and 802.1Q trunking features in Cisco IOS Software Release 12.0 (T) and later.
Which routers support EtherChannel and EtherChannel trunking?
This document uses a Cisco 7200 router. But you can use any other router that supports EtherChannel and 802.1Q trunking to get the same results. The Requirements section of this document provides a list of routers that support EtherChannel and 802.1Q trunking. Before you attempt this configuration, note these requirements: