Ahmed,
bellow is an example to limit your Applications: (Note: you can accomplish this by using shaping or Policing)
class-map match-any exchange
match protocol smtp
match protocol pop3
class-map match-any vpn
matach access-group 100
access-list 100 permit udp any any eq isakmp
access-list 100 permit udp any eq isakmp any
policy-map limit
class exchange
police 2000000
class vpn
police 4000000
Then, you need to apply your policy (limit) on the interface: ie
Interface serial0/0
service-policy output limit
HTH
Mohamed
