[f-nsp] Tagged interfaces

[Josh Farrelly]

Sub-interfaces only really apply to router type devices. They refer to logical ports (i.e. VLANS) arriving on a single physical port.

VLAN configuration in the traditional sense usually applies more to switches, where you're assigning certain ports to VLANs and setting them as trunks or access ports .etc

So to answer your question, they're almost the same thing — It just depends in which context you're referring to them. Don't get confused by the terminology :)

Kind Regards,

Josh Farrelly
Infrastructure Architect, ICTS.
Manukau Institute of Technology

From: Eric A Louie <elouie at yahoo.com<mailto:elouie at yahoo.com>>
Date: Friday, 5 October 2012 12:47 PM
To: Josh Farrelly <Josh.Farrelly at manukau.ac.nz<mailto:Josh.Farrelly at manukau.ac.nz>>, "foundry-nsp at puck.nether.net<mailto:foundry-nsp at puck.nether.net>" <foundry-nsp at puck.nether.net<mailto:foundry-nsp at puck.nether.net>>
Subject: Re: [f-nsp] Tagged interfaces

Josh, that's a great document, thank you.

I'm going to do the testing in the lab, but are there any functional advantages to using VLAN configurations versus sub-interface configuration on the Cisco device when converting from the Foundry Ethernet multiple IP address configuration?

Much appreciated,
Eric Louie
619-743-5375


________________________________
From: Josh Farrelly <Josh.Farrelly at manukau.ac.nz<mailto:Josh.Farrelly at manukau.ac.nz>>
To: Eric A Louie <elouie at yahoo.com<mailto:elouie at yahoo.com>>; "foundry-nsp at puck.nether.net<mailto:foundry-nsp at puck.nether.net>" <foundry-nsp at puck.nether.net<mailto:foundry-nsp at puck.nether.net>>
Sent: Thu, October 4, 2012 3:30:11 PM
Subject: Re: [f-nsp] Tagged interfaces

Hi Eric

For the most part, yes to both.

Take a look at this document here (pages 19 & 20): http://community.brocade.com/servlet/JiveServlet/previewBody/1848-102-1-3553/Brocade-Cisco%20Comparison.pdf

Kind Regards,

Josh Farrelly
Infrastructure Architect, ICTS.
Manukau Institute of Technology

From: Eric A Louie <elouie at yahoo.com<mailto:elouie at yahoo.com>>
Date: Friday, 5 October 2012 11:07 AM
To: "foundry-nsp at puck.nether.net<mailto:foundry-nsp at puck.nether.net>" <foundry-nsp at puck.nether.net<mailto:foundry-nsp at puck.nether.net>>
Subject: [f-nsp] Tagged interfaces

I'm preparing to translate some Foundry configurations to Cisco.



As far as I can tell, the tagged interfaces are really just 802.1q trunk ports.  Is that an accurate assessment?



Foundry allows multiple IP addresses on the Ethernet interface.  Do I have a choice to use vlan interfaces and/or Ethernet sub-interfaces on the Cisco to provide the same functionality?


Much appreciated,
Eric Louie

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