GroupStudy.com GroupStudy.com - A virtual community of network engineers
 Home  BookStore  StudyNotes  Links  Archives  StudyRooms  HelpWanted  Discounts  Login
Re: Unicast RPF check! posted 03/30/2007
[Chronological Index] [Thread Index] [Top] [Date Prev][Date Next] [Thread Prev][Thread Next]


Check your frame maps


On 3/30/07, Digital Yemeni <digital.yemeni@xxxxxxxxx> wrote:
Hi group!

I got strange behavior and hope someone can clarify it for me.
I have the following simple topology:

R1-----------------------------------------R2--------------------------SW1
10.10.10.1              10.10.10.2    192.168.1.2         192.168.1.1

R1 is connected to R2 via Frame-Relay
R2 is connected to SW1

R1 frame-relay interface has RPF check as "ip verify unicast reverse-path "

When R1 pings SW1 interface (192.168.1.1) i get RPF failure! R2 debug shows
the 192.168.1.1 IP comes from the frame-relay interface and thus drop the
traffic as spoofed IP!

Can anyone explain what's going on?


-- Best Regards! Digital, CCIE# to be assigned by Cisco when it collects enough $$ out of me! :p

_______________________________________________________________________
Subscription information may be found at:
http://www.groupstudy.com/list/CCIELab.html