Ping behavior and ACL
I have set up a simple lab with 2 routers (R1, R2) connected over a point-to-poing serial link.
R1 ----------------------- R2
I have configured an ACL on R1 router as follows:
"access-list 100 permit icmp any any"
and applied inbound on the R1's serial interface.
My question is why when I ping from R2 to R1 with repeat count of 1 I get 3 matches on R1's ACL?
Also, when I disable CEF on R1's serial interface where the ACL is applied I get 2 matches per packet.
Finally, when I add the "log" keyword at the end of the ACL I get 1 match per ping packet as I expected from the beginning.
Anyone has a clue what's going on?
Thanks in advance