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How do I configure an IP helper for DHCP when handling mulitple VLANS

tom_lebel
New Contributor II
I am new to ICX.  I have SPR08061a code running and have Ruckus R610 APs plugged in to multiple ports.  The AP are configured for 4 VLANs via 4 SSIDs (based on OS running on end device and a guest network).
I have my main ICX 7150 plugged into my Internet router (Sonicwall) and also back to server room with a second ICX 7150 wherer DHCP server is.
Question is how do I set up DHCP IP helper so wireless clients each get the appropriate IP from the DHCP server?

I can provide more info if it is needed.

TT24
11 REPLIES 11

tom_lebel
New Contributor II
@Igor,
I'm not sure how to upload an attachment in this forum, but I had a post recently on the old Brocade forums with a diagram that's very close to my current layout. https://community.brocade.com/t5/Ethernet-Switches-Routers/Routing-a-new-vlan/td-p/94904
.  (I'm still trying to figure out who owns the ICX Brocade family of switches now... Brocade directs you to Extreme Networking as the new place, but Ruckus is branded on the switches and has all the software updates and docs.)

Ruckus owns the ICX line but that's it. 

igor_tunakin
Contributor
Truth be told I am steel not sure I understand your network.  You wrote 'second ICX 7150 wherer DHCP'. Does it means you configured  DHCP  pools on  your 2nd switch? Show the configuration of the 2nd switch please.

tom_lebel
New Contributor II
Igor,

Thanks, the diagram is a little off, as it was one I did as I was still building.  DHCP is on a Windows server off second switch, on Vlan 1. Here is the show run for second ICX7150:
Current configuration:
!
ver 08.0.61aT213
!
stack unit 1
  module 1 icx7150-24p-poe-port-management-module
  module 2 icx7150-2-copper-port-2g-module
  module 3 icx7150-4-sfp-plus-port-40g-module
!
!
global-stp
!
lag ToMain dynamic id 1
 ports ethe 1/1/1 to 1/1/2
!
!
!
vlan 1 name DEFAULT-VLAN by port
 router-interface ve 1
 spanning-tree
!
vlan 2 by port
 tagged ethe 1/1/16 to 1/1/24 lag 1
 router-interface ve 2
 spanning-tree
!
vlan 3 by port
 tagged ethe 1/1/16 to 1/1/24 lag 1
 router-interface ve 3
 spanning-tree
!
vlan 10 name Guest by port
 tagged ethe 1/1/16 to 1/1/24 lag 1
 untagged ethe 1/1/15
 spanning-tree
!
!
!
!
!
!
!
!
!
!
!
!
!
aaa authentication web-server default local
aaa authentication login default local
enable telnet authentication
enable aaa console
hostname "Brocade Annex-240"
ip dns domain-list DOMAIN.MY
ip dns server-address 10.56.0.6 10.56.0.8
ip route 0.0.0.0/0 10.56.0.1
ip route 10.56.2.0/24 ve 2
ip route 10.56.2.0/24 0.0.0.0
ip route 10.56.3.0/24 ve 3
ip route 10.56.3.0/24 0.0.0.0
!
username Admin password .....
password-change any
snmp-server contact Tom Lebel
snmp-server location Annex Computer Room
!
!
clock timezone gmt GMT-05
web-management https
!
!
!
!
!
!
!
interface ethernet 1/1/16
 dual-mode
 inline power
!
interface ethernet 1/1/17
 dual-mode
 inline power
!
interface ethernet 1/1/18
 dual-mode
 inline power
!
interface ethernet 1/1/19
 dual-mode
 inline power
!
interface ethernet 1/1/20
 dual-mode
 inline power
!
interface ethernet 1/1/21
 dual-mode
 inline power
!
interface ethernet 1/1/22
 dual-mode
 inline power
!
interface ethernet 1/1/23
 dual-mode
 inline power
!
interface ethernet 1/1/24
 dual-mode
!
interface ethernet 1/3/1
 speed-duplex 1000-full
!
interface ethernet 1/3/2
 speed-duplex 1000-full
!
interface ethernet 1/3/3
 speed-duplex 1000-full
!
interface ethernet 1/3/4
 speed-duplex 1000-full
!
interface lag 1
 dual-mode
!
interface ve 1
 ip address 10.56.0.240 255.255.254.0
!
interface ve 2
 ip address 10.56.2.240 255.255.255.0
!
interface ve 3
 ip address 10.56.3.240 255.255.255.0
!
!
!
!
!
!
!
!
!
end

TT

igor_tunakin
Contributor
Once again for understanding. When a device connects to a network, the DHCP client software sends a broadcast query. When a client is in VLAN 2 or 3 and the DHCP-server is on VLAN1, to forward a DHCP request you should configure helper address on the interface connected to the client. In your case it is Interfaces from 1/1/15 to 1/1/24.
The ports form 1/1/1 to 1/1/14 have dafault VLAN1 and all clients conected to this ports are able to connect your DHCP-Server.

The alternative solution would be to configure DHCP pools on the switch. I this case you donot need the Windows DHCP server. 

For example:

ip dhcp-server enable
!
ip dhcp-server pool 1
 dhcp-default-router 10.56.0.240
 dns-server 8.8.8.8
 excluded-address 10.56.0.1 10.56.0.240
 network 10.56.0.0/23
 deploy
!
ip dhcp-server pool 2
 dhcp-default-router 10.56.2.240
 dns-server 8.8.8.8
 excluded-address 10.56.2.240
 network 10.56.2.0/24
 deploy
!
ip dhcp-server pool 3
 dhcp-default-router 10.56.3.240
 dns-server 8.8.8.8
 excluded-address 10.56.3.240
 network 10.56.3.0/24
 deploy
!
ip dhcp-server pool 10
... ???

Please pay attention to the VLAN 10. There is not router-interface configuration.