Hello Atish,
Cedric is right, you cannot associate a lif to a static route, you must do it to a vserver.
network route show: it shows the associations between a static route and the Vservers.
network route show-lifs: it shows the association between a static route and the lifs.
The reason behind this is that all LIFs in a Vserver must be able to access the same paths in the network.