topic ip helper-address on Extreme in ExtremeSwitching (EXOS/Switch Engine)

ip helper-address on Extreme

Bruce_Garlock — Tue, 05 Apr 2016 01:01:00 GMT

Coming from a HP Procurve world, we could have 'ip helper-address' settings for each VLAN. How can I have a production VLAN have a different DHCP server from a Guest VLAN in EXOS?

Here's my procurve settings:

vlan 200 name "VLAN200" ip helper-address 192.168.200.12 vlan 500 name "VLAN500" ip helper-address 172.16.0.1
What would the equivalent of this look like on EXOS?

Thanks,
Bruce

RE: ip helper-address on Extreme

Drew_C — Tue, 05 Apr 2016 01:03:00 GMT

I believe BOOTP Relay is what you're looking for:
https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-configure-Bootprelay

RE: ip helper-address on Extreme

davidj_cogliane — Tue, 05 Apr 2016 01:04:00 GMT

Configure bootp relay for your helper address.

RE: ip helper-address on Extreme

Jeremy_Gibbs — Tue, 05 Apr 2016 01:08:00 GMT

configure bootprelay add vr vr-default
enable bootprelay vr vr-default vlan

RE: ip helper-address on Extreme

Patrick_Voss — Tue, 05 Apr 2016 01:23:00 GMT

The article says this as well but you need to make sure you enable bootprelay on the VLAN the server sits on as well. If the discover needs to be routed to get to this VLAN enable bootprelay on the egress VLAN

RE: ip helper-address on Extreme

BrandonC — Tue, 05 Apr 2016 01:30:00 GMT

Hi Bruce, just to add on to what everyone else already said, if you want to send DHCP traffic from one vlan to a specific DHCP server, you can specify the vlan when adding the server in bootprelay. For example:

en bootprelay vlan v1 en bootprelay vlan v2 conf bootprelay vlan v1 add 1.1.1.2 conf bootprelay vlan v2 add 2.2.2.2

RE: ip helper-address on Extreme

Bruce_Garlock — Tue, 05 Apr 2016 01:33:00 GMT

This is exactly what I was looking for! Many thanks!!