Help converting 1142 AP

[Clay Plaga]

I have a Cisco 1142 access point that I'm using to study and practice for my wireless certification. I've been practicing converting the access point from lightweight to autonomous and then back again. After I converted it from lightweight to autonomous, I tried numerous times to assign an IP address to the gigabit interface(g0), via the CLI. After the IP configuration, when I ran show IP interface brief the output said that the IP address had been assigned to the gigabit interface, but I could not ping it, and I could not log on to the web interface with the IP address I gave it. When I removed the IP address and then assigned it to the BVI1, it worked. Can somebody explain to me why I can only complete the conversion with the BVI1 interface, and it did not work through the gigabit interface, or was I doing something wrong.

Thank you.

[Rasika Nayanajith]

Hi Clay,

In Autonomous, you have to assign IP address to BVI interface (that is the logical interface like SVI interface in switches)

Refer below posts to learn different ways of doing this conversion.

https://mrncciew.com/2012/10/20/lightweight-to-autonomous-conversion

https://mrncciew.com/2013/12/13/ap-conversion-using-mode-button

HTH

Rasika

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[Clay Plaga]

I was able to successfully convert the access point from lightweight to autonomous. I then connected the access point to my test network and my DHCP server gave it an IP address. I found the IP address and I was able to log into the autonomous access point from my web browser. I then set up telnet through the web browser interface and I logged into the access point using telnet. When I ran show IP interface brief, I could see that DHCP assigned the IP address to the BVI1 interface, not the gigabit interface. My question is, what is the gigabit interface used for, and if it's not used what then what is it used for?

Thank you.

[Rasika Nayanajith]

Think about a L2 switch, we define management vlan interface (called SVI-Switch Virtual Interface) & assign IP address of the switch to that instead of physical ports.

Same concept goes in Autonomous (as it is a L2 device) where we assign IP address under BVI - Bridge Virtual Interface instead of physical ports (gig0 or gig1)

Hope that clarify it.

Rasika

[Clay Plaga]

Okay, I think I understand now. I will continue my studies.

Thank you very much.