DHCP Best Practices 3

[VTTD1870]

When it comes to DHCP in a Voice and Data Converged Network, what is considered best practices:
- Customer's DHCP server for both the phones and the PC's or;
- IP Office as DHCP for the phones and Customer's DHCP server for the PC's

 

[derfloh]

I would always use only one DHCP server in one network... I don't like the idea to offer two servers in one network.

 

[tlpeter]

Derfloh, so this means that a vlan can have is own dhcp server


BAZINGA!

I'm not insane, my mother had me tested!

 

[derfloh]

Peter, for sure if two VLANs are used. But I understood the OPs question that he wants to use a single network for voice and data.

I prefer to use the customer's DHCP in the data VLAN and IPO as DHCP in the voice VLAN.

I just don't li
ke to use two DHCP servers if phones and computers share the same VLAN.

 

[Gunnaro]

I think he meant "in one subnet"

I can't say I thrilled by the thought of having the IPO hand out DCHP to phones in a subnet with a working DHCP server present.
(It kind of works, phones favours the IPO, and you can apply "IP phones only")

One day the IT-guy needs more addresses, forgetting the promise to keep his sticky fingers out of your pool.
That will be marked as the D-day in the customers calendar.

Adding the correct Options to the DHCP Server is the way to go, in my opinion.



Kind regards

Gunnar
______________________________________
Mille viae ducunt homines per saecula Romam

 

[VTTD1870]

To clarify: customer has multiple voice and data VLANs based upon location and switch stacks.

 

[derfloh]

If the customer has multiple data and voice VLANs I suppose he uses a central DHCP server and a DHCP relay in every VLAN.in that situation I would use the customer's DHCP Server for every VLAN. In the data VLANs let the DHCP server provide the corresponding voice VLAN ID and in the voice VLAN provide the correct CallServer and Fileserver IP addresses.

 

[Gunnaro]

That's crucial info, belonging in the intial post.
Converged network does not automatically imply VLans....just saying.

Kind regards

Gunnar
______________________________________
Mille viae ducunt homines per saecula Romam

 

[VTTD1870]

My apologies. That is the term that Avaya often used in their Application notes.

 

[mattKnight]

You could also ask the customer what their preference is.

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[IPGuru]

Having the IPO provide the DHCP for the Voice Vlan certainly reduces the headaches that can ensue when the IT dept decide to change things (although it can add other ones as well)

Leave the data Vlan to the customer, you will get more than enough hassle as it is (unless you can also become their network provider/maintainer)

Most important make sure the the demarcation points are thoroughly documented (ie Voice Vlan belongs to us don't f**king touch) ;-)


A Maintenance contract is essential, not a Luxury.
Do things on the cheap & it will cost you dear

 

[VTTD1870]

So, is it safe to say that there is no "best practice" but more of a personal preference?

 

[amriddle01]

It's safe to say this is normally dictated/determined by the network/IT man, not the telephone system installer. The telephone system is just a user of the network as their PCs, servers etc are. How it should/needs to work should be their call really not yours

 

[derfloh]

Best is if you are able to help them to configure their DHCP server. Then you are safe in almost every situation.

 

[TomMills]

forgetting the promise to keep his sticky fingers out of your pool."

* for the chuckle.

APSS/ACIS/ACSS-SME
not arrogant, just succinct.