HP 5400zl DHCP-Relay Agent no append for option 82

[JamesHigh]

I am trying to configure the DHCP-Relay option 82 on a HP 5412zl switch, software #K.15.09.0012.

The Multicast and Routing Guide (K.15.08 c03277344) includes the description of the append option and even gives an examples

# dhcp-relay option 82 append mgmt-vlan

Trying this on the switch returns:

# dhcp-relay option 82 append mgmt-vlan
Invalid input: append

and running an autocomplete query on the switch shows:

# dhcp-relay option 82
drop Specifies that the DHCP packet will be dropped
unconditionally, if option 82 field(s) already exists in
the client DHCP packet.
keep Specifies that no option 82 field will be added or
replaced, if option 82 field(s) already exists in the
client DHCP packet.
replace Specifies that any existing option 82 fields will be
replaced with switch option 82 field for client DHCP
packet.
validate Specifies the validation for server response.

Does anyone know how to use the append option?

If this is no longer available what is the best way to configure it? At present I have dhcp-snooping on the edge switches, which inserts the mac as option 82.

On my central routing switch I have the DHCP-Relay configured to forward the packets to a Windows 2012 DHCP server and would like to enable this to append the IP in option 82.

Thanks.

[Vince_Whirlwind]

Personally, I don't use "append". I get around option 82 issues on the core as follows:

On the Access switches, I have:

   dhcp-snooping
   dhcp-snooping authorized-server 10.10.20.67
   dhcp-snooping vlan 1 105 205

On the "core", I have:

   dhcp-snooping
   dhcp-snooping authorized-server 10.7.20.67
   no dhcp-snooping option 82
   dhcp-snooping vlan 1 101-299