05-30-2018 10:47 PM - edited 03-08-2019 03:11 PM
Hi every one.
i am working on l3 ether-channels my topology is as under...
as mentioned in above pictures...
when is run command show etherchannel summary
all the 3 switches show me RU ( R l3 and u In use) they are now showing me down then why there is no connectivity between sw0 and sw 1i, no error in their show etherchannel summary commmand
thankyou...
Solved! Go to Solution.
05-31-2018 03:35 AM - edited 05-31-2018 03:37 AM
You can't create Etherchannel of 6 interfaces and use 3 as connection to one switch and other 3 to different switch (if switches are not configured in stack, VSS or vPC). There should be separate etherchannels for connection to each switch.
06-01-2018 12:01 PM
05-31-2018 03:35 AM - edited 05-31-2018 03:37 AM
You can't create Etherchannel of 6 interfaces and use 3 as connection to one switch and other 3 to different switch (if switches are not configured in stack, VSS or vPC). There should be separate etherchannels for connection to each switch.
06-01-2018 12:01 PM
06-01-2018 12:10 PM - edited 06-01-2018 12:11 PM
Yes. You need 2 etherchannels per switch. Have in mind that if you create L2 etherchannels one of etherchannels will be blocked by STP.
Need for routing depends on design. Since you configured L3 etherchannels at least static routing is needed. If L2 eherchannels are configured there might be no need for routing except L3 device.
06-01-2018 12:22 PM
06-01-2018 12:25 PM
06-01-2018 01:59 PM - edited 06-01-2018 02:00 PM
Yes, no switchport is needed to make L3 etherchannel.
The reason why it is reserving VLANs is by design. Switches may have ascending or descending reservation depending on model. Simplified, switch is acting like interface is assigned to the VLAN (e.g 1006) and then applies the rest of the configuration to port (configuring port as access port, removes spanning tree, vtp, disable MAC learning). Reserved VLANs can be seen on swithches with show vlan internal usage command.
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide