How do you set a default route on an IOS Cisco router?

config t ip route 0.0.0.00.0.0.0 x.x.x.x

x.x.x.x = IP Address

static routing through typing in the command in configuration mode r(config)# ip route <network> <subnet mask> <exit interface><next hhop (optional)>r(config)# iproute 0.0.0.00.0.0.0 <exit interface>or r(config)# iproute 0.0.0.00.0.0.0 <next hop ip >accuracy with network and mask is preferred

ip route 0.0.0.00.0.0.0 x.x.x.x(nexthop)

For ASA CIsco

ASA(config)#route inside 0.0.0.00.0.0.0192.168.1.1

ip route 0.0.0.00.0.0.0 x.x.x.x 

x.x.x.x = IP Address for interface you wants to send all traffic

ip default-gateway >> ip route 0.0.0.00.0.0.0

Default routes are used to direct packets addressed to networks not explicitly listed in the routing table. Default routes are invaluable in topologies where learning all the more specific networks is not desirable, as in case of stub networks, or not feasible due to limited system resources such as memory and processing power.