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a.b.c.e Alice k.l.m.n/30 a.b.c.1/24 The net k.l.m.n+4/30 NSIS NATFW NSLP aware NAT Router IANA assigned address proposal IANA prefix advertised inside the local infrastructure by the edge NAT: Useful for multi-homed networks Message sender will need to use alternate IANA addresses from the prefix to accommodate load sharing when ECMP implementation use source and destination addresses only (vs more parameters like 5 tuple or more) Else specific prefix advertisement not needed default route could handle it Edge routers will drop packets to the IANA assigned prefix this would be needed when no NAT aware NAT is deployed |