Liaison statement
LS reply on invalid connection address for IPv4 and IPv6
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State | Posted |
---|---|
Submitted Date | 2008-05-13 |
From Group | 3GPP |
From Contact | Susanna Kooistra |
To Group | IETF |
To Contacts | chair@ietf.org |
Cc | iesg@ietg.org |
Purpose | For action |
Deadline | 2008-06-23 Action Taken |
Attachments | LS on specification of an invalid connection address for IPv4 and IPv6 |
Body |
3GPP TSG CT WG4 Meeting #39 C4-081484 Cape Town, South-Africa, 5th – 9th May 2008 Title: LS reply on invalid connection address for IPv4 and IPv6 Response to: Release: Release 8 Work Item: SIP-I_Nc Source: TSG CT WG4 To: IETF Cc: TSG CT Contact Person: Name: phil hodges Tel. Number: +61404069546 E-mail Address: Philip.hodges@ericsson.com Attachments: 1. Overall Description: 3GPP TSG CT WG4 are developing a SIP-I application for the Nc interface (Intra PLMN control plane between MSC Servers) and have a specific optional feature for deferring the MGW selection. The solution proposes to signal an "invalid" or "unspecified" connection address when the MGW has not be seized and if the succeeding node supports the deferred MGW selection procedure it seizes a MGW and signals the Identity of the MGW back via an SDP attribute. It is currently proposed to use the unspecified connection address (0.0.0.0) however at CT WG4#39 it was questioned that as IETF is mandating the use of .INVALID for IPv6, could the same solution be used for IPv4 ? Are UA's currently required to be able to receive this, and therefore it does not violate any IETF rules for IPv4 connection address usage ? Does IETF offer any recommendations on this usage ? 2. Actions: To IETF group. ACTION: CT4 asks IETF whether the .INVALID address may be used to indicate an unspecified IPv4 connection address and does IETF offer any recommendation in this respect ? 3. Date of Next CT4 Meetings: CT4#39bis 23rd – 27th June 2008 Zagreb, CROATIA |