The VLAN database is relevant to switches, not to routers.
I presume your router is connected to a switch that can handle VLANs. That is where you need to create your layer-2 VLANs. If you want your router to connect to a VLAN, say VLAN 2, then you have to do it something like this:
encapsulation dot1q 2
ip address 192.168.2.1 255.255.255.0
Repeat that for however many VLANs you want to route.
According to the features on cisco 870 series routers all the ethernet ports are layer 2 nor layer 3 it means u cannot assign ipaddress and more over all the 4 ethernet ports are in the vlan 1 and this ciso 876 supports only one VLAN and no more vlans.
Hope this info is help and if i am wrong and if u were able to create a 2nd VLAN,please let me know how to do it.
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