Cisco Cisco Packet Data Gateway (PDG) Guia De Resolução De Problemas
WiMAX PMIPv6 Operation
▀ LMA Operation
▄ Cisco ASR 5000 Series Access Service Network Gateway Administration Guide
OL-22953-01
LMA Operation
The LMA supports in-band protocol security. The received PBU that entails signaling protection in the form of valid
authentication option receives a PBA that uses the same protection mechanism. The PBUs received without embedded
signaling protection are processed and acknowledged only if the source MAG is trusted and Authentication Options
(AO) are not enforced for that PMIPv6 peer. When the in-band signaling protection is enabled, the LMA participates in
the PMIPv6 key derivation and management process.
authentication option receives a PBA that uses the same protection mechanism. The PBUs received without embedded
signaling protection are processed and acknowledged only if the source MAG is trusted and Authentication Options
(AO) are not enforced for that PMIPv6 peer. When the in-band signaling protection is enabled, the LMA participates in
the PMIPv6 key derivation and management process.
If the R3 reference point is completely IPv4-based, the LMA accepts the registration of IPv4 Proxy CoA to the MS’s
BCE. The LMA verifies that the PMIPv6 mobility management for the attaching IPv4 MS is permitted at the time of
processing the initial PBU through the AAA query.
BCE. The LMA verifies that the PMIPv6 mobility management for the attaching IPv4 MS is permitted at the time of
processing the initial PBU through the AAA query.
Managing Binding Cache Entry Data Structure
LMA is similar in its functions to a Mobile IPV6 Home Agent. One of the major differences between PMIPv6 and
Mobile IPV6 is the use of a Home Network Prefix in PMIPv6 as opposed to the fully-qualified 128-bit HoA in Mobile
IPv6. PMIPv6 only supports the Per-MN-Prefix model and does not support Shared-Prefix model. There is a unique
home network prefix assigned to each mobile node, and no other node shares an address from that prefix.
Mobile IPV6 is the use of a Home Network Prefix in PMIPv6 as opposed to the fully-qualified 128-bit HoA in Mobile
IPv6. PMIPv6 only supports the Per-MN-Prefix model and does not support Shared-Prefix model. There is a unique
home network prefix assigned to each mobile node, and no other node shares an address from that prefix.
Access Authentication
The LMA uses the MN-Identifier option to authenticate and load a subscriber profile. The MN-Identifier option is
mandatory in a PBU request.
mandatory in a PBU request.
Proxy Binding Update Processing in LMA
Proxy Binding Update (PBU) uses messages similar to Binding Updates in Mobile IPV6. The messages are processed in
a way that is similar to BU processing in MIPv6 HA. The following are the main differences between BU and PBU
processing.
a way that is similar to BU processing in MIPv6 HA. The following are the main differences between BU and PBU
processing.
The Home Address Destination Option is not present in PBU, but is a required option in MIPv6 BU.
Authenticate Proxy BU requests use the security parameters index (SPI) in the IPSEC header.
Sequencing PBU processing
A timestamp option is supported in LMA that enables or disables the use of a timestamp for PBU re-sequencing. It is
enabled by default. When enabled, the sequence number based re-sequencing will not be preformed in the LMA.
enabled by default. When enabled, the sequence number based re-sequencing will not be preformed in the LMA.