! Listing 8.16: Single external router with two links to the same ISP ! !Copyright (C) 2001 by Vincent C Jones. All Rights Reserved. version 11.0 ! hostname ExternalRouter ! ip subnet-zero ! interface Ethernet0/0 description No Man's Land LAN ip address 100.0.0.33 255.255.255.224 ip access-group 193 in no ip directed-broadcast ! interface Serial0/0 description Link to the Internet via ISP ip address 110.0.0.1 255.255.255.252 ip access-group 191 in ip access-group 192 out no ip unreachables no ip directed-broadcast ! interface Serial0/1 description Second Link to the Internet via ISP ip address 110.0.0.5 255.255.255.252 ip access-group 191 in ip access-group 192 out no ip unreachables no ip directed-broadcast ! ip route 0.0.0.0 0.0.0.0 Serial0/0 ip route 0.0.0.0 0.0.0.0 Serial0/1 ip route 100.0.0.8 255.255.255.248 100.0.0.46 ip route 100.0.0.16 255.255.255.240 100.0.0.46 ip route 100.0.0.64 255.255.255.192 100.0.0.46 ip route 100.0.0.0 255.255.255.0 Null0 ! end