my scenario is

internet----linux router------cisco router(for VPN connectivity)

my ISP gave me Fiber with media convertor. settings are
137.101.47.184/30 pool for point to point connectivity.
so I configure my linux router eth3 with IP 137.101.47.186 and its gateway is 137.101.47.185.

my ISP gave me public IP pool for LAN use which is.
137.101.48.184/29
i configure my Linux router eth2 for this pool, my setting are.
eth2 IP is= 137.101.48.185/29
now I configure my Cisco router Fe0/0= 137.101.48.186/29 gateway is 137.101.48.185

my cisco router creates vpn with my second router in other city but vpn traffic is not working,
Kindly help me why this happen.

Thanks is advance.
Riz.