# don't store plain passwords in config file !
service password-encryption
# hide your software
no banner motd
[...]
interface ppp0
# descriptions are informative, use them
 description my-ISP-gw
 bandwidth 57
interface ppp1
 description remote-office-gw
 bandwidth 115
[...]
interface eth0
# always specify bandwidth, if you plan to use auto-cost
 bandwidth 100000
 description local-office-gw
[...]