Noob question. From what I read there can only be a single SVI associated with a VLAN. However I am able to create multiple interfaces for VLAN 1.

SWITCH2#show ip interface

    IP Address        I/F    I/F Status  Type   Directed  Prec Redirect Status
                             admin/oper         Broadcast
------------------ --------- ---------- ------- --------- ---- -------- ------   vlan 1    UP/DOWN    Static  disable   No   enable   Valid   vlan 1    UP/DOWN    Static  disable   No   enable   Valid


Also a switch comes with a default interface for VLAN 1 (I can use that IP to access the web management console in a browser). Now if I am going to connect two (or more) switches together then that implies that there'll be 2 interfaces in VLAN 1.(I would need 2 different IPs to access the web interface of the 2 switches)

Where I am getting wrong? Somewhere I am getting confused between the following terms and aspects,

  1. Management Interface(s) for VLAN 1 (I understand management doesn't need to be 1)
  2. VLAN Interface
  3. SVI

Any inputs will be appreciated


Single SVI is a single interface with the name vlanX. What you are showing here is the SVI interface with more than one IP address. This is common and this is valid. One is primary, all others are secondary.

1) Management interface for a switch can be any of SVI interfaces, but it can also be a dedicated out-of-band interface, if the switch has one.

2) This is actually a SVI.

3) There's indeed only one SVI per vlan. It's optional, but every switch has at least one out of the box for vlan 1 usually.

  • Thx. very helpful. clear now – user9878 Nov 22 '17 at 4:23

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