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Re: [RRG] Comments on draft-lewis-lisp-interworking



Thus spake "Tony Li" <tony.li@tony.li>
|> Simply this: if return packets leaving a LISP site, headed
|> for a non-LISP site, use a EID as the source address, then it
|> is highly likely that the packets will be dropped due to the
|> source address filtering.
|
|It would pass a lose-mode check since the route is in the table, which
|is the current best practice for multi-homed networks.

Ok, but as you're transitioning to LISP, you want to remove routes to EID
prefixes from the routing table.  That breaks loose or strict mode.

Presumably, the EID _aggregate_ would be in the routing table, so loose mode would succeed. However, the route would be pointing in the "wrong" direction, so strict mode would fail. Putting a static route (not redistributed) for the customer's EID on their interface would make both succeed.

S

Stephen Sprunk         "God does not play dice."  --Albert Einstein
CCIE #3723         "God is an inveterate gambler, and He throws the
K5SSS dice at every possible opportunity." --Stephen Hawking

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