2x C4506-E Licence ipbase! Hi, I learned, that in Step 2 and 3 it is very important to use "no switchport". So I should use L3. int port-channel 1 no switchport switch virtual link 1 ! int ten 1/1 no switchport channel-group 1 mode on After switch convert mode virtual the switch 1 works fine, but the switch 2 has an error for the vsl-link. It seems the C4506-E +Sub7E on the last IOS 03.04.00.SG can't config VSS with L3. Configure the dual-activ detection bfd is not possible to. Need I the L2 config? Days later: I tested the new IOS IOS 03.04.1.SG1 from 07/2013. And I tested the L2 config too. I gat allways the same result. The VSL-Link dosn't work. so I have 2 active switches.
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