That works on GNS3 You just need to twist the configuration on the CSR1000v, LAN interface. Something like below. Have tried in trunk from the switch, can see the frame with VLAN TAG on wireshark, but the CSR doesn't recognise it. Not many post on internet about it. Seems bug CSR. No big deal, go with config below. Still good to enjoy OTV and see how that works with Wireshark behind. \\CSR interface GigabitEthernet2 no ip address service instance 10 ethernet encapsulation untagged (-->>>>> CSR is not able to detect trunk Dot1q!! so here we use “encapsulation untagged”) rewrite ingress tag push dot1q 10 symmetric bridge-domain 10 \\SWITCH int eth0/0 switchport mode access witchport access vlan 10 \\ABOUT THIS LAB Have used IOU L2 (GNS3 VM) and VPC station on both ends to generated packets. The LAB is a bit tricky, you need to dig a liltle on the interface, to inter-connect them together. I am using workstation. And add a cloud (GNS3) that connect your PC to your CSR, to remote acces to it with your favorite "Putty" or "SecurCRT" whatever you use. See picture enclosed to show what that looks like. ENJOY!!
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Thanks a lot !! After 2 days on testing with GNS3, to find why the protocol int tunnel stay down and not showing up in the route table of this VRF, found your post, guys and it works !! On the web, found many example without this command. I have tried 2 scenario, and this command was not here. You made my days, can use this solution in my job, just in time. On top of that, i use DMVPN, and it works great. Thanks
tunnel source 192.168.240.1 tunnel mode gre multipoint tunnel vrf name_of_your_VRF
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