I have noticed that I am getting a large amount of packets input on my 3825 VPN router when I do a 'show int null0'.
I understand the normal reasons for packets going out of null0 (summarization, desired black holing etc) but why would null0 be a source of packets? The number of packets is only slightly less than the packets going through the router - and I have many succesfull site-to-site VPNs.
I suspect this is some kind of feature, but didn't want to just ignore it.
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...