[Juniper SSG] DHCP Not avaliable for Sub-Interfaces

After opening a case with Juniper I was made aware that I cannot have a DHCP server associated with a sub-interface on an SSG-Series security device under the following conditions:

  1. The device has firmware version 6.1.X or below
  2. The device is in an NSRP cluster

Trying to associate a DHCP server with an sub-interface in the above case will permit only the option to have a “DHCP Relay Agent”.

Knowledge base: KB14185 confirms this. However, on a NS-Series security device with version 5.4 r10 or above (did not test anything lower) I did not encounter this problem.

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