What's happening is the broadcast packet is being picked up and being processed by the helper code, which sets the next hop to 172.20.1.100. The resulting packet is then switched; since there is PBR on the interface, the policy is examined first, and the policy tells the packet to be switched out Tunnel 101. Or at least that's what I would expect.
At this point, though, I'm not certain what the problem is. Are you saying the packets will not be switched out the tunnel interface at all? They are being switched out the serial interface, but isn't that where the tunnel interface would live?
Why are you running policy based routing here anyway? The only policies you have set up are for specific destinations to be routed a specific way, and that can be handled using standard static routes, so I'm not certain what your final goal is....
Yes. Only DHCP packets are switched out the serial interface without GRE encapsulation. Normal IP traffic are switched out tunnel 101.
I can see these DHCP packets (with dest. 172.20.1.100) "traveling" in network 10.0.0.0
These packets should be encapsulated as others IP packets (like ICMP) and should be routed through network 10.0.0.0.
I'm running policy based just for migration scenario. I configured the route-map to ip any any to be sure that this is not the problem. And, also, I need to be sure that this model (helper address, tunnel and route-maps) works.
We are pleased to announce availability of Beta software for 16.6.3.
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