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Desirable Properties The solution MUST NOT shift effort (externality), i.e., the convenience of the location-hiding ISP MUST NOT impose a burden on user agents or non-hiding ISPs/IAPs and SHOULD NOT impose a burden on VSPs. The solution SHOULD minimize the impact on LoST, SIP conveyance [I-D.ietf-sip-location-conveyance] and DHCP. The solution SHOULD NOT rely on DHCP for LoST configuration, as the information in the DHCP server provided by the ISP may not reach the UA, due to NATs. |