Re: [dhcwg] RFC2131 - option multiple times

I thought it was clear that the relay-agent information option could 
occur at most once.

Where is the specification that the relay-agent information option can 
appear multiple times?
Any such specification would seem to conflict with the following 
excerpts from RFC 3046.

2.1 Agent Operation
    ...
    A DHCP relay agent adding a Relay Agent Information field SHALL add
    it as the last option (but before 'End Option' 255, if present) in
    the DHCP options field of any recognized BOOTP or DHCP packet
    forwarded from a client to a server.
    ...
    A trusted circuit may contain a trusted downstream (closer to client)
    network element (bridge) between the relay agent and the client that
    MAY add a relay agent option but not set the giaddr field.  In this
    case, the relay agent does NOT add a "second" relay agent option, but
    forwards the DHCP packet per normal DHCP relay agent operations,
    setting the giaddr field as it deems appropriate.

On Mar 9, 2005, at 8:21 PM, David W. Hankins wrote:

> On Wed, Mar 09, 2005 at 05:45:39PM -0500, Bernie Volz wrote:
>> The idea was that MAYBE in the future, options might be defined that 
>> can
>> appear multiple times and would not be concatented, but that hasn't 
>> been the
>> case.
>
> except for the relay agent option, which can appear multiple times and 
> not
> be concatenated.  it's also a special case in other ways, which is why 
> it
> can get away with that.

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Re: [dhcwg] RFC2131 - option multiple times - which ones ?