DMVPN query 2

[Fred Stanton]

Hello
I noticed bgp can be used for an overlay routing process (single hub/cloud dvmpn topology)  how would it work when i have a single BGP AS and how can this be done automatically for tunnel peering?

[MHM Cisco World]

You need bgp peer-group and /or bgp router server

MHM

[MHM Cisco World · Accepted solution]

https://www.cisco.com/c/en/us/support/docs/security/dynamic-multipoint-vpn-dmvpn/222585-configure-bgp-over-dmvpn-phase-3.html

MHM

[Fred Stanton]

@MHM Cisco World 
thanks for the link i’ve gave you the solution as its a cisco link but can you tell me the difference from what @paul driver  and @Giuseppe Larosa  stated for i dont see any reference IBGP

[paul driver · Accepted solution]

Hello @Fred Stanton 
This can be accomplished on the HUB by using a bgp peer-group and listen range for your tunnel addressing and also making that HUB a route-reflector for your spokes

lastly you need to make sure on the spokes you negate the default loop prevention of bgp that negates prefixes from being installed that originate from its own AS so to allow spoke to spoke advertisement OR you can just send a default route to each spoke from the hub?

see attached file for possible setup..

[Fred Stanton]

@paul driver 
thx  for the file but it looks so convoluted., i think @MHM Cisco World  is on the right track with his link
thank you anyway

[paul driver]

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@Fred Stanton wrote:

@paul driver 
thx  for the file but it looks so convoluted.

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WOW!  sorry for that... however that is my understanding of what is required based on your query, but just for clarity though that config which is too convoluted, doesn't even show your underlay which also needs to be CFG'd

All the best..

[Giuseppe Larosa · Accepted solution]

Hello @Fred Stanton ,

@paul driver solution is correct if you want  to use  a single  AS   iBGP  on hub and spokes.

Hope to help

Giuseppe

[Fred Stanton]

Thank you but to me  @MHM Cisco World seems more appropriate