RE: [RRG] Six/One Router Design Clarifications

["Drake, John E" <John.E.Drake2@boeing.com>]

Snipped ...

>Hold on.  It doesn't matter whether the ACL is host-based or 
>at coarser granularity.  For any edge address or edge address 
>prefix (EID or EID prefix) that you may put in an edge ACL, 
>there is exactly one transit address or transit address 
>prefix, respectively, that you would put into an equivalent 
>core ACL.  No need to have nightmares.
>
>Talking about performance:  An ACL that can limit its looks to 
>a single place in the IP header (i.e., with translation) can 
>likely be more efficient that an ACL that needs to look into 
>an inner IP header behind a pair of LISP and UDP headers.

JD:  In any map & encap scheme, won't a transit space router have to
deal with a multiplicity of packet formats (e.g., both encapsulated and
non-encapsulated packets) and won't it be a performance hit to figure
out a packet's format and then look for the correct fields within it?

>
>- Christian
>
>
>
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