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New Member

Inter VLAN routing best practice

   Good day experts.

We have been having a discussion at work regarding IP addressing best practicesfor Inter VLAN routing & default gateways IP addresses.

My question is:

Is it best practice to use the 1st IP address in the block as the Inter VLAN IP address or use the last IP?

Are there pro's & con's for using either?

The same question applies to default gateways etc.

All responses very welcome.

Many thanks.

Rob.               

4 REPLIES

Inter VLAN routing best practice

Rob,

Really it's 6 of 1 and half dozen of the other. I've seen both ways really. Some people have schemes that use only the last address for their SVIs and then the hosts start from 1 up and then there is the other school of thought that use the 1st address from the SVI and set all of the hosts to use that as the gateway. My particular scheme uses the first address in the block on the SVI and then I set aside 99 static addresses for assigning to hosts. If I have hosts on that vlan that need to be assigned an address via dhcp, I'll start my scope at 100 - 254 (for a class c block).

There's really no pro or cons to one way or the other; just be consistent with it to make it easier on yourself and future admins

HTH,

John

HTH, John *** Please rate all useful posts ***
Purple

Inter VLAN routing best practice

  I agree i have seen it as .1 or .254 as the gateway for a vlan .  No right or wrong , just keep it consistent .

New Member

Inter VLAN routing best practice

I normally use the .1, or the first IP address in the case of a non-full class. I do this so that if I expand from say a /21 to a /20 the defaults do not change and nothing has to be skipped or reserved. Just my two cents worth.

Brent

New Member

Re: Inter VLAN routing best practice

Hi,

Many thanks for all your responses, sorry it took me a while to respond.

I have always used the first ip in the range as I think it is easier when using vlsm etc.

I'm glad to hear that many others do the same.

Once again many thanks.

Rob.

Sent from Cisco Technical Support iPhone App

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