10-26-2015 05:10 PM
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10-26-2015 06:23 PM - edited 12-13-2015 01:36 PM
I need to know if I need to put the ip - helper on each vlan interface on
every switch. I currently have it on my primary router.
Thank you for your quick response.
10-26-2015 06:25 PM
Aruba Customer Engineering
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10-26-2015 06:33 PM - edited 12-13-2015 01:37 PM
I did put it on every vlan interface on one switch, before I reached out
for guidance. Will that create a problem? Would you happen to know the
command to remove the dhcp relay setting?
Thank you very much for your help on this.
10-27-2015 02:27 AM
You would generally just put it on the vlan interface for the core switch/router. If you add to every switch you could end up with multiple addresses being assigned to the same device and then wasted dhcp addresses, cause only one will be taken by the device.
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ACCP, ACMP, ACMX #294
12-13-2015 01:57 PM
Thank you for yoru continued help with my problem.
I do have DHCP relay on the s2500 core router\switch.
Originally, someone setup our current HP switches, using the Aruba S2500 as the router. There is one s1500 that is directly connected to the S2500, via a port channel, and that works fine without the dhcp relay on it.
When I go to upgrade other HP switches to the s1500, the s1500 doesn't work until I put dhcp relay on it. But dhcp relay shouldn't be configured on each switch?
12-20-2015 11:22 AM
it depends on if you use l3 interfaces on those switch or just extend the l2 network. if they have seperate l3 interfaces / networks you need dhcp relay, if you just extend the l2 network the dhcp request ends up at the l3 interface of the core switch.