On 8 May 2014 15:56, Dennis Mugaya <mudenasi@gmail.com> wrote:
ecure-server
!
ip nat inside source list 1 interface GigabitEthernet0/0 overload
ip route 0.0.0.0 0.0.0.0 41.57.103.253
!
!
!
snmp-server community public RO R0
snmp-server community private RW
!

scheduler allocate 20000 1000

Since i don't see ACL for acl-no1 i assume you aren't using NAT but rather routed IPs - right?

Both IP (confirmed) pass via 2 different link; throughput may not be same. 
You could tell the provider to get you better IPs (controversial) - of the same network/provider as WAN link IPs.
You could NAT the LAN ips to WAN and test if same throughput is achieved under NAT. Just add "access-list 1 permit 41.57.104.16  0.0.0.15

Inline images 2

Inline images 1

Kind Regards,
Wilson./