Multihoming
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... management access to networking equipment. There are cases when this
may create problems, e.g., with multihoming. This document describes
the current ingress filtering operational mechanisms, examines
...
... generic issues related to ingress filtering and delves into the
effects on multihoming in particular.
RFC 2827 ...
... are made. In section 4, ingress filtering is analyzed in detail from
the multihoming perspective. In section 5, conclusions and potential
future work items are identified.
...
... ingress filtering as of writing this
memo. The mechanisms are described and analyzed in general terms,
and multihoming-specific issues are described in Section 4.
There are at least five ways one can implement RFC 2827 ...
... ISPs if the set
of prefixes changes (e.g., as a result of multihoming) might lead to
discarding the packets if they do not pass the ingress filter.
...
... filtering between the primary and secondary edge routers; in
particular, when applied to multihoming to different ISPs, this
assumption may fail.
...
... Solutions to Ingress Filtering with Multihoming ...
...
o be changing ISPs (and therefore multihoming only temporarily).
One can imagine a number of approaches to working around the
...
... For the edge network, if multihoming is being used for robustness or
to change routing from time to time depending on measured ISP ...
... Hagino, J. and H. Snyder, "IPv6 Multihoming Support at Site Exit Routers", RFC 3178, October 2001. ...