Cisco Cisco ASR 5700
Mobility Management Entity Overview
Features and Functionality - Base Software ▀
MME Administration Guide, StarOS Release 18 ▄
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RFC 3314: Recommendations for IPv6 in 3GPP Standards
RFC 3316: Internet Protocol Version 6 (IPv6) for Some Second and Third Generation Cellular Hosts
RFC 3056: Connection of IPv6 domains via IPv4 clouds
3GPP TS 27.060: Mobile Station Supporting Packet Switched Services
3GPP TS 29.061: Interworking between the Public Land Mobile Network (PLMN) supporting Packet Based
Services and Packet Data Networks (PDN)
The MME allows an APN to be configured for IPv6 EPS Bearer contexts. Also, an APN may be configured to
simultaneously allow IPv4 EPS Bearer contexts.
simultaneously allow IPv4 EPS Bearer contexts.
The MME supports IPv6 stateless dynamic auto-configuration. The mobile station may select any value for the interface
identifier portion of the address. The link-local address is assigned by the MME to avoid any conflict between the
mobile station link-local address and the MME address. The mobile station uses the interface identifier assigned by the
MME during the stateless address auto-configuration procedure. Once this has completed, the mobile can select any
interface identifier for further communication as long as it does not conflict with the MME's interface identifier that the
mobile learned through router advertisement messages from the MME.
identifier portion of the address. The link-local address is assigned by the MME to avoid any conflict between the
mobile station link-local address and the MME address. The mobile station uses the interface identifier assigned by the
MME during the stateless address auto-configuration procedure. Once this has completed, the mobile can select any
interface identifier for further communication as long as it does not conflict with the MME's interface identifier that the
mobile learned through router advertisement messages from the MME.
Control and configuration of the above is specified as part of the APN configuration on the MME, e.g., IPv6 address
prefix and parameters for the IPv6 router advertisements. RADIUS VSAs may be used to override the APN
configuration.
prefix and parameters for the IPv6 router advertisements. RADIUS VSAs may be used to override the APN
configuration.
Following IPv6 EPS Bearer context establishment, the MME can perform either manual or automatic 6to4 tunneling,
according to RFC 3056, Connection of IPv6 Domains Via IPv4 Clouds.
according to RFC 3056, Connection of IPv6 Domains Via IPv4 Clouds.
MME Interfaces Supporting IPv6 Transport
The following MME interfaces support IPv6 transport:
S1-MME: runs S1-AP/SCTP over IPv6 and supports IPv6 addresses for S1-U endpoints.
S3
S6a
S10
S11
S13
SBc
SGs
SLg
SLs
Sv
Gn
Load Balancing
Load balancing functionality permits UEs that are entering into an MME pool area to be directed to an appropriate
MME in a more efficient manner, spreading the load across a number of MMEs.
MME in a more efficient manner, spreading the load across a number of MMEs.