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Jonathan LoFlag for Australia asked on

IP address of the core switch vs the IP address of the virtual interface for the management VLAN?

Hi Experts,

I'm programming up a L3 core switch and is a little confused and would like to get some inputs on this one.

I have been provided with a VLAN/IP address schedule similar to below:

VLAN   Name                        IP Range                     Gateway IP

91         Management 

92         Workstations 

93         IP Phones       

94         Guest              

On top of that, in the IP address schedule for the network switches defined the core switch with an IP of, which I presume would reside in the management VLAN 91.

I'm a bit confused as usually I'd program VLANs on the core switch like:

interface vlan 91

ip address

interface vlan 92

ip address

.... vice versa

When I do that, the interface IP also becomes the gateway of the device within that VLAN. But with VLAN 91, it is not possible to apply a second IP to the interface. Furthermore, the other switches in the network are configured in L2 mode and has a default gateway of at the moment to allow traffic.

What have I missed? Is it a standard practice to have the VLAN interface IP different to the core switch's IP?

I'm still learning so any help is appreciated!  :)

NetworkingNetwork ManagementNetwork Architecture* interVlan

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Jonathan Lo

8/22/2022 - Mon
Don Johnston

Unless you’re working with something like a Nexus switch, there really is no “management“ IP address.  So for your typical multilayer switch, you manage it using whatever IP address you want that is assigned to the switch.  If you want to restrict it to a specific address, you can do that with access lists.

But in the end, it’s just another IP address assigned to the switch.
Jonathan Lo

FYI I'm working with a Ruckus ICX7750 switch :)

So is it correct for me to say that the IP address of the core switch should be configured either as or and the VLAN 91's gateway would follow whatever IP address the switch is programmed?

In other words, devices in VLAN 91 will be using the IP address of the core switch as gateway as well as management via SSH?
Don Johnston

Experts Exchange is like having an extremely knowledgeable team sitting and waiting for your call. Couldn't do my job half as well as I do without it!
James Murphy
Jonathan Lo

Thanks Don!
Jonathan Lo

Now after a bit of back and forth with the design team, it seems they would like the IP address of the switch to be however the gateway of VLAN91 as

The config for the VLAN at the moment is

interface vlan91
ip address

How should I go by setting this up? As the core switch handles the L3 routing, I'm not able to add a second IP to the VLAN....

Don Johnston

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Jonathan Lo

I'm working with Ruckux ICX and they too have that option. Thanks!

Thanks for your input! I actually doubted myself for a second as to what is the "standard practice" hahaha
I actually created random names for the VLAN and IP addresses, so yeah they are not for phones :) but I don't like the idea of /22 either

Thanks all for your input!
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