Access router with different subnet IP

[asimsaeed]

have router ip 172.16.9.1 and my system ip in 172.16.8.1. i cannot access my router and other network of 172.16.x.x.only access router when my system ip 172.16.9.x. what configuration can make the router can access with all subnet of 172.16.x.x

[Edison Ortiz]

If the interface holding IP address 172.16.9.1 is physically connected to the segment where your device (172.16.8.1) resides, then you need to configure a secondary IP address on the interface holding IP address 172.16.9.1.

The command is: ip address 172.16.8.x 255.255.255.0 secondary under the same interface.

Any reason why the router was given an IP address of 172.16.9.x instead of 172.16.8.x?

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Edison.