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Thu, May 9, 2019 9:52 PM

Struggling with one DHCP server, and multiple VLANs on ICX 7150 Switch image

I have one DHCP server in default VLAN.  I have multiple VLAN (voice) and I want the ports on the VLAN to grab dhcp addresses from additional scopes.  I know that I need to use IP Helper, but all instructions refer to an IP address assigned to your VLAN.  I don't see where to do that...only IP address assigned is the siwtches IP.

Responses

Employee

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20 Messages

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646 Points

2 years ago

Hi Paul,
As you are using a Switch Image, only one IP address can be configured on the switch. Generally when using DHCP Services, we load the Routing Image which allows you to configure IP/VE per VLAN and an associated DHCP Pool per VLAN.
Cheers
Vince

6 Messages

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120 Points

2 years ago

I understand, but I'm not using the Ruckus DHCP services.  I'm using my windows server DHCP server on the default VLAN, and just want to hand out a scope\different subnet to another VLAN.

232 Messages

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4K Points

2 years ago

Paul, are you using a standard switch image, and not Router FW? 

6 Messages

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120 Points

2 years ago

Yeah ..Standard switch image (08070d).  I have a flat network now, and daisey chaining an new switch--that will have VOIP on it.  THe DHCP server is on the defautl vlan, on sw1.

232 Messages

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4K Points

2 years ago

is your DHCP a VM by chance? How many vlans do you need DHCP to handle?

6 Messages

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120 Points

2 years ago

DHCP is a VM on our main server, including file, and Domain server.   Outside the default VLAN which the original scope handles, two more VLAN.

232 Messages

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4K Points

2 years ago

if so, possibly you could turn on more interfaces, ip/place them onto ports where native vlan equals the Vlan you're trying to DHCP for, Then as your VOIP devices start asking for DHCP, there should be an issue? this might be overthinking though. Another question, can DHCP in it's current config hear dhcp requests from your clients' devices on all Vlans?

6 Messages

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120 Points

2 years ago

From a physical senses yes.DHCP could hear all requests.  But VLANing the VOIP, wiht a port that only has a Phone on it...logically DHCP can't not hear teh requests.  But it is my understanding that have a VLAN use a different scope and subnet, you need to logically use an IP Helper...

6 Messages

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120 Points

2 years ago

How about this..do I have use the Router Image to do what I'm trying to do...?