Hi Derrick,

Inline:

On Wed, Mar 02, 2016 at 03:00:17PM -0800, Derrick Sawyer wrote:

> Also, are you sending v4 and v6 AFs over a v4 BGP session or
> you have two BGP sessions, one v4 and one v6?
> *-- Sending v4 & v6 over v4 session.  What be the best way to have a v4 an
> v6 session? 2 config files or can this be done from a single conf?*

I recommend sending v4 and v6 AF's over the same v4 BGP session; this
is because v4 and v6 flows are both sent via the same NetFlow v4 address
and this eases correlation. Otherwise you would need a bgp_agent_map,
ie. overhead, to make it work; something like:

bgp_ip=10.10.10.0       ip=10.10.10.0 filter=ip
bgp_ip=<IPv6 address>   ip=10.10.10.0 filter=ip6

Which reads: correlate v4 flows from 10.10.10.0 to the BGP session
with 10.10.10.0 and correlate v6 flows from 10.10.10.0 to the BGP
session with <IPv6 address>. This is only a recommendation and if,
for whatever reason including architectural policies, one has to
build two BGP sessions, v4 and v6, then this is supported (via a
a bgp_agent_map snippet like the above).

> What is the content of the file pointed by bgp_agent_map?
> *-- This is the peering routers IPs (changed but looks like this)*
> *bgp_ip=10.10.10.0  ip=10.10.10.0bgp_ip=10.10.11.0  ip=10.10.10.0*

This is not needed, you can skip the map all together as this kind
of correlation is the only one done automagically for you (ie. see
if there is a BGP session from an IP address or with a BGP session
ID same as the IP address with which NetFlow packets are exported). 

> do you see v6 prefixes landing allright onto pmacct, ie. as part of the
> content of the file pointed by bgp_daemon_msglog_file?
> *-- When I use the src_host agg, I see v6 addresses but not when using the
> src_net agg.  I do not see any v6 prefixes in bgp_daemon_msglog_file*

Then here could be the issue: can you check on your router that it
is actually sending the v6 prefixes? With something equivalent to
"show ip bgp neighbors <nfacctd VM IP address> advertised-routes"
on IOS? 

Cheers,
Paolo

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