Subject: [mobile-ip] Link Layer Address in FMIPv6 and FMIPv4

From: "Woojune Kim" <[email-masked]>
Date: Tue, 11 Feb 2003 12:59:55 -0500

All,

Both FMIPv4 and FMIPv6 define link layer address types along the TLV format with subtypes identifying the specifics. But they differ in the specifics. See below.

FMIPv4 subtype
       1        3GPP2 International Mobile Station Identity and
                     Connection ID [6]
       2        3GPP International Mobile Subscriber Identity [13]
       3        Ethernet 48 bit MAC address [7]
       4        64 bit Global ID, EUI-64 [8]
       5        Solicited IP Address
       6        Access Point Identifier

FMIPV6 subtype
       1 for the Link-layer Address of the new Attachment Point.
       2 for the Link-layer Address of the MN.
       3 for the Link-layer Address of the Proxied Originator

My basic question is shouldn't these be made similar ?

Also, how should PPP link layers be handled ? Shouldn't PPP get a link address as well ? 

More specific questions pertaining to the 3GPP2 / 3GPP cases below. (Do we need to solve them here on the MobileIP WG ? Do we have enough hooks that they can be resolved by the link layer specific standards bodies ?)

For IPv6 over PPP, the link layers have identifiers for each entity. For 3GPP2 at least, this then raises the issue of whether the identify is the 3GPP2 IMSI or the identifier negotiated in PPP.

Another question I have specific to the FMIPv4 case is that the link layer address identifiers for 3GPP2 , 3GPP only indicate the MN's identity, but does not give any indication of how to indicate the Network entity's identity. Is the Access Point Identifier to be used ?

thanks

Woojune Kim