Cisco 800 series router problems

[vgurbanov]

Hello.The internet speed of the Cisco 800 series router does not exceed 20 mb. How can we solve this problem?

[Leo Laohoo · Accepted solution]

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@vgurbanov wrote:

The internet speed of the Cisco 800 series router does not exceed 20 mb. How can we solve this problem?

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1. Get a bigger router, preferably one that can handle >20 Mbps. 
2. Downgrade your WAN speed to match the router's capabilities. 

[vgurbanov]

Is there no other way? this is the last option.

[johnlloyd_13]

hi,

as leo mentioned, it's already a limitation on the router/HW you're currently using.

just to cover basics, do you see any errors or output drops on the WAN interface? are you using any VPN?

post a 'show interface <WAN port>' output.

[vgurbanov]

Hello. No vpn. Only internet. The internet image shows 100mb on another router but 20mb on this router. The reason for this is interesting to me.

[Georg Pauwen]

Hello,

20MB sounds extremely low...

Post the running configuration of your router, maybe we can spot something...

[vgurbanov]

Thanks friends. I solved the problem.
ip route-cache cef

[Georg Pauwen]

Hello,

20MB would have been way too low even for that router. Glad you got it resolved. You might as well post your config anyway, maybe we can spot something else...

[vgurbanov]

Building configuration...

Current configuration : 1813 bytes
!
version 15.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
!
boot-start-marker
boot system flash c880data-universalk9-mz.159-3.M1
boot-end-marker
!
shell processing full
!
no aaa new-model
memory-size iomem 10
!
!

ip cef
no ipv6 cef
!
!
license udi pid CISCO881-K9 sn FCZ174292ZG


interface FastEthernet0
no ip address
spanning-tree portfast
!
interface FastEthernet1
no ip address
spanning-tree portfast
!
interface FastEthernet2
no ip address
spanning-tree portfast
!
interface FastEthernet3
no ip address
duplex full
spanning-tree portfast
!
interface FastEthernet4
ip address 10.172.6.253 255.255.255.248
ip nat outside
ip virtual-reassembly in
duplex full
speed 100
!
interface Vlan1
bandwidth 10000000
ip address 172.16.16.16 255.255.255.0
ip nat inside
ip virtual-reassembly in
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
ip nat inside source list 1 interface FastEthernet4 overload
ip nat inside source list NAT interface FastEthernet4 overload
ip route 0.0.0.0 0.0.0.0 10.172.6.254
!
ip access-list extended NAT
permit ip host 172.16.16.0 any
!
access-list 1 permit 172.16.16.0 0.0.0.255
!
!
!
line con 0
no modem enable
line aux 0
line vty 0 4
login local
transport input ssh
line vty 5 15
login local
transport input ssh
!
!
end

[Georg Pauwen]

Hello,

you might want to take out this line (since it is redundant and not needed):

ip nat inside source list NAT interface FastEthernet4 overload

Other than that, the config looks by the book.