Source AS 0 means the exporting router had no AS-path info for the route
back to the source at the time the record was written. Could be your
AS, or prefixes for which you have no route in BGP, or a prefix where
you had a more specific route in IGP so the BGP route was not used. All
of your outbound traffic will also usually have source AS 0.
This will show you what inbound flows are getting reported like that:
flow-cat [foo] | flow-filter -i[outside if] -a0 | flow-stat -f24 -s0
Edson Manners wrote:
I have run a flow-stat with 2 days worth of flow information on netflow
data coming into our network for Src AS sorted on octets.
The very first entry is very interesting as the AS number is reported as
0. Why would this happen? What exactly does this mean?
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