ACI DHCP relay multiple servers configuration

[gcombaj]

Hi,

we are moving a VLAN that has two ip helper-addreses configured into ACI and want to keep both addreses.

When we create a DHCP policy and want to add a second DHCP server address to the SAME EPG we get and error

that says something like "there is already a DHCP server binding to this EPG".

We get the same message when we try to add multiple DHCP servers to same L3out.

Do you have any tips how to have multiple DHCP servers on same EPG or L3out?

We are running 4.1.

[6askorobogatov]

Under DHCP policy (any of it , fabric wide or tenant) you may have more then one provide, they could be any  types as well: EPG / L3Out/L2out/etc

[6askorobogatov]

BTW, DHCP relay goes to the Bridge Domain , not the  EPG. 

[gkumark · Accepted solution]

Yes, as of now multiple DHCP servers behind the same EPG in same Provider policy is not supported. Instead, you can create a second policy for the second server and attach multiple DHCP relay policies under the client BD. 

Hope that helps.

-Ganesh

[gcombaj]

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@gkumark wrote:

Yes, as of now multiple DHCP servers behind the same EPG in same Provider policy is not supported. Instead, you can create a second policy for the second server and attach multiple DHCP relay policies under the client BD. 

Hope that helps.

-Ganesh

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Thank you for the tip.

I can confirm it works this way.

[pvzcisco07]

Hi Ganesh,

I am using the MSO to push out the config to the APICs.

I have added another DHCP policy as you suggested but it doesn't allow me to attach more than one policy to the BD.

Is this option available only on the APIC?