You aren't creating a vlan , you are trying to create a layer 3 SVI which I don't think you can do on an extended vlan . To create a vlan , just do "conf t " enter. Then just type vlan 1512 ,enter . this will create the vlan and verify by doing a "show vlan" .
Is this switch running the standard image or the enhanced image? I am guessing that it is running the standard image in which case it recognizes VLANs only in the range 1-1005. So the int vlan 1512 would be invalid on a switch running standard image.
Question We run asr9001 with XR 6.1.3, and we have a very long delay to
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