ip verify unicast source reachable-via any allow-default
On Thu, Sep 30, 2021 at 12:08 AM Mark Tinka <mark@tinka.africa> wrote:
> If you don't plan to run a full BGP table on a device, don't enable uRPF, even loose-mode.
At least in Ciscoland, loose URPF checks will pass if you have a
default route. So I do not think it could result in inadvertent
blackholing of traffic.
What it does allow is for *deliberate* blackholing for traffic; if you
null-route a prefix, you now block incoming traffic from that subnet
as well. This can be useful and it is how we are using URPF.
--
Hunter Fuller (they)
Router Jockey
VBH M-1A
+1 256 824 5331
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The University of Alabama in Huntsville
Network Engineering