Is it possible to assign the same static IP for two different MAC addresses?

kejianshi

Unless your wireless drops… Which never happens (-;

Derelict

Which is why I said good wireless, not some $19 tp-link from walmart.

stpq

"Even if you move your IP to a different nic - your session like ssh is still going to die.."
ehm, nope..

"So your complaint is your ssh client doesn't reconnect for you?"
yeah, but do u have any clue how long it takes for ssh to timeout?

wireless…. hmm... something like AC than, and even that wont give u gigabit... wire is wire and wireless sux, regardless the price of it..

And again, dont take me wrong, as i stated earlier... I just think, that it can be a valid argument... I mean its implementen in ISC.. its a feature, not a liability...

s

Derelict

So you want:

1: the speed of Gig-E when you're wired
2: the convenience of wireless when you're not
3: total disregard for the OSI model when you switch between them.

Got it.

kejianshi

I'm convinced personally - I'm switching all my servers to wifi (-;

stpq

@Derelict:

So you want:

1: the speed of Gig-E when you're wired
2: the convenience of wireless when you're not
3: total disregard for the OSI model when you switch between them.

Got it.

you are totally right…

but look at this: https://forum.pfsense.org/index.php/topic,36066.msg186013.html#msg186013

so it still might be possible...

and does it violate OSI model to have two interfaces with addresses from the same subnet?

Derelict

No. It violates the OSI model having two interfaces with the same MAC or two MACs with the same IP.

Derelict

@stpq:

and does it violate OSI model to have two interfaces with addresses from the same subnet?

You have two interfaces: eth0 at 192.168.1.13 and eth1 at 192.168.1.14

Your default gateway is 192.168.1.1

Which interface(s) should be used to send traffic to the gateway?

It's not against the model, but requires special consideration and per-interface (not just per-subnet) routing rules.

johnpoz

@stpq:

"So your complaint is your ssh client doesn't reconnect for you?"
yeah, but do u have any clue how long it takes for ssh to timeout?

Would depend on the settings in ssh server. What are the settings for ClientAliveInterval, TCPKeepAlive and ClientAliveCountMax? They could be very short, or very long depending on what the admin of the ssh server set.

Where is this a ISC dhcp feature - just because you can get something to load and function in the config, does not mean its a SMART thing to do ;) You can do lots of things that some software will allow - doesn't mean its good practice ;)

Networking 101, mac's are suppose to be unique. You wouldn't want the same IP address on different macs..

Cino

I agree with what everyone is saying but there is a way to assign the same static IP to two different MACs. I do it if I assign a static IP to a device that has multiple interfaces (WDTV, Roku 3, TVs, Work Laptop)

This is not supported by pfsense and could break your system if you mess up!!! I hold no responsible if you break your system nor do I offer support. But I am willing to share the knowledge of how it can be done

You will have have to manually edit your config.xml… Goto you the <dhcpd>section then look for <staticmap>... You should get the idea of how to do this...Once you save your changes, reboot your box..


			 <staticmap><mac>00:19:9d:12:9f:4c</mac>
				<ipaddr>192.168.0.51</ipaddr>
				<hostname>vizio</hostname>

				 <filename><rootpath></rootpath></filename></staticmap> 
			 <staticmap><mac>00:19:9d:08:dc:05</mac>
				<ipaddr>192.168.0.51</ipaddr>
				<hostname>vizio</hostname></staticmap>

Capture.JPG_thumb </staticmap></dhcpd>