I added a SVI interface in my Switch-3560 24PS, and I send no shutdown , but when I show ip interface brief, there shows down.

Vlan100            YES manual down                  down


how can I up it?

enter image description here

  • Have you added the layer 2 VLAN? conf t - vlan 100 - end - wr mem. An access port or trunk port will have to forward the VLAN before it comes online after that.
    – user56700
    May 29 '19 at 8:02
  • you see the Switch0 and Switch1, the link between them is a trunk link.
    – 244boy
    May 29 '19 at 8:09
  • You are right, i missed that. Is it online after you have added the layer 2 VLAN?
    – user56700
    May 29 '19 at 8:12
  • post your configurations
    – infra
    May 29 '19 at 8:31

In general, if you add a SVI, you should add the relevant Vlan.

in you scene, you should add vlan 100 in the config mode:

#(config)vlan 100

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