Network Mobility (NEMO)
NEMO Overview ▀
Cisco ASR 5x00 Packet Data Network Gateway Administration Guide ▄
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Features and Benefits
The system supports the usage of dynamically learned, overlapping customer prefixes. These prefixes are advertised via
BGP.
MIPv4-based NEMO Control Plane
The following figure shows a high-level view of the NEMO control plane.
Figure 17.
NEMO Control Plane
NEMO includes the following features:
Collocated-Care-of-Address mode
The Cisco NEMO MR is expected to use the Collocated-Care-of-Address mode to establish a NEMO MIPv4
session with NEMO4G-HA and as one of the IP endpoints of the NEMO GRE Tunnel for the transport of user
traffic.
MR-HADDR
NEMO4G-HA supports a potential “dummy” MR-HADDR address that would be configured in every MR
within the same Enterprise or across all served Enterprises (same IP address).
Dynamic advertisement of WAN-IP Pools and learned LAN prefixes
eBGP is used to advertise the Enterprise WAN-IP Pools and the LAN prefixes learned via NEMO for the
associated Enterprise.
N-MHAE credentials
NEMO4G-HA supports local authentication for the NEMO MIPv4 RRQ based on preconfigured N-MHAE-
SPI/KEY values on a per Enterprise basis (one unique set for all MRs belonging to the same Enterprise) or on a
global basis (one unique set for all Enterprises).
LAN prefixes
NEMO4G-HA accepts a minimum of zero LAN prefixes and a maximum of eight prefixes per mobile
router. Anything beyond eight prefixes shall be silently discarded.
NEMO4G-HA supports any prefix length (including /32).
NEMO4G-HA supports dynamic prefix updates.