Vpn between ir1821 and c921

[bourbiayahia]

I encountered an issue while trying to configure a LAN-to-LAN IPsec tunnel between an IR1821 and a C921 router.

I followed this guide: Cisco LAN-to-LAN IPsec Configuration.

The C921 is running version 15.9(3)M3, and the IR1821 is running version 17.13.01a.

Problem: I couldn’t ping between the two LANs.
Could this be a version mismatch issue or an incompatibility problem?

[MHM Cisco World]

Share config of both Router let me check it

MHM

[Flavio Miranda]

@bourbiayahia 

 This guide you followed have troubleshooting section at the end and two command there are very important:

show crypto ipsec sa

show crypto isakmp sa

what do you see with this two commands?