[c-nsp] question on s/rtbh 6500 with sup720-3cxl

[John Brown]

Quick dumb question on S/RTBH.
I get all the foo around the dynamic nature of using BGP to inject the
bad prefix (source or dest) we want to drop.

At present we do this with destination dropping / blackholing.   I
want to drop RFC 1918 sourced packets coming to me at my edge towards
providers / peers.  I've got one provider sending me nearly 80Mb/s
worth traffic with the source IP being in Net-10.  Their answer is for
me to ACL it. ICK

My thought was to enable loose uRPF on the interface  and create a
static route for net-10 pointing to null0

interface te4/1
   ip verify unicast source reachable-via any

ip route 10.0.0.0 255.0.0.0 null0

shouldn't that cause net-10 into the FIB with a ptr to null0 and thus
uRPF will discard ??

Netflow still shows traffic on that interface with source's in Net-10.

I'm either brain dead, my sup720-3cxl is, or ???

thanks