Subject: [Mip4] MS multiple IP add in SIP case.

From: "Arun SG" <[email-masked]>
Date: Wed, 2 Aug 2006 16:03:59 +0530

In document X.S0011-002-D v1.0, at one place we see this: 

3.2.1.5 DHCPv4 Support
Blah, lah....
However, if the
25 MS acquires additional IPv4 addresses from a DHCP server using a PDSN
as the relay agent,
26 the PDSN shall store the additional IPv4 addresses.

But at a later section, we see that: 

3.4.1.5 DHCPv4 Support
34 The MS may support and use DHCP [RFC 2131] to request specific
configuration parameters
35 [RFC 2132], which may include DNS addresses and/or SIP server
addresses [RFC 3361].The
36 MS should not use DHCP [RFC 2131] to request additional IPv4
addresses.

Is this summary then correct?
1. MS may request multiple IP addresses from the network, but not use
DHCP client to do so. 
2. To get multiple IP addresses, the only option is to use IPCP. 
3. Since there can be only one IP address per PPP session and one PPP
session between MS and PDSN, 

Is there a case at all when a MS needs to & can get multiple IP address?

If there is a case, how does it get that address? 
Should PDSN's DHCP relay agent discard such requests? 

Please note that this is a SIP scenario.

Thanks,
Arun

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