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Title : Network In Node Advertisement
Author(s) : P. Thubert, et al.
Filename : draft-thubert-nina-01.txt
Pages : 31
Date : 2007-7-5
The Internet is evolving to become a more ubiquitous network, driven
by the low prices of wireless routers and access points and by the
users' requirements of connectivity anytime and anywhere. For that
reason, a cloud of nodes connected by wireless technology is being
created at the edge of the Internet. This cloud is called a MANEMO
Fringe Stub (MFS). It is expected that networking in the MFS will be
highly unmanaged and ad-hoc, but at the same time will need to offer
excellent service availability. The NEMO Basic Support protocol
could be used to provide global reachability for a mobile access
network within the MFS and the Tree-Discovery mechanism could be used
to avoid the formation of loops in this highly unmanaged structure.
Since Internet connectivity in mobile scenarios can be costly,
limited or unavailable, there is a need to enable local routing
between the Mobile Routers within a portion of the MFS. This form of
local routing is useful for Route Optimization (RO) between Mobile
Routers that are communicating directly in a portion of the MFS.
Network In Node Advertisement (NINA) is the second of a 2-passes
routing protocol; a first pass, Tree Discovery, builds a loop-less
structure -- a tree --, and the second pass, NINA, exposes the Mobile
Network Prefixes (MNPs) up the tree. The protocol operates as a
multi-hop extension of Neighbor Discovery (ND), to populate TD-based
trees with prefixes, and establish routes towards the MNPs down the
tree, from the root-MR towards the MR that owns the prefix, whereas
the default route is oriented towards the root-MR.
The NINA protocol introduces a new option in the ND Neighbor
Advertisement (NA), the Network In Node Option (NINO). An NA with
NINO(s) is called a NINA (Network In Node Advertisement). NINA is
designed for a hierarchical model where an embedded network is
abstracted as a Host for the upper level of network abstraction.
With NINA, a Mobile Router presents its sub-tree to its parent as an
embedded network and hides the inner topology and movements.
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