Hello,
I know this has been mentioned over the years here and there, but I don't
know that I fully understand the exact behavior. I've always read 'urpf
halves your tcam...'. So this only applies to the interface on which it's
configured, correct ? So for example, in a single switch with the full
routing table (using ipv4 for examples, and using simple even numbers
not counting any built-in entries):
uplink 1 - 400k routes
uplink 2 - 400k routes
customer interface 1 - 2 routes
customer interface 2 - 2 routes
So this is 400,004 entries. Adding (strict) urpf to the customer
interfaces (not the uplinks) would make this 400,008 ?
I guess I'm just unsure of if urpf is added to a single interface (even a
customer interface with 1 or 2 prefixes) - does this have some 'global'
effect ?
Thanks in advance.
--
Brandon Applegate - CCIE 10273
PGP Key fingerprint:
8779 B023 7637 CEC8 C5C6 4052 664D 7E08 3CBB 1739
"SH1-0151. This is the serial number, of our orbital gun."
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