How to optimize my Internet access?

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Apr 18th, 2008
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Hi have 4 E1 FR configured on my router to the internet access.

We have about 2000 concurrent connections to internet over these links.

We have a lot of congestion on the links as show on she config:

What can I do to try to increase my performance an have a better internet access?

I really appreciate your help!

All my serial interfaces are configured as follow, I send the ACL too

interface GigabitEthernet0/1

description To my LAN

bandwidth 11520

ip address

ip access-group Trafico_OUT in

no ip unreachables

no ip proxy-arp

ip nbar protocol-discovery

ip inspect Firewall in

ip nat inside

ip virtual-reassembly

load-interval 30

duplex full

speed 1000

media-type rj45

no mop enabled


interface Serial0/0/0

description To MY ISP

no ip address

encapsulation frame-relay IETF

no ip mroute-cache

load-interval 30

serial restart-delay 0

frame-relay lmi-type ansi


interface Serial0/0/0.531 point-to-point

description ConexionISP

bandwidth 1920

ip address

ip access-group Trafico_IN in

ip verify unicast reverse-path

no ip redirects

no ip unreachables

no ip proxy-arp

ip nat outside

ip virtual-reassembly

frame-relay interface-dlci 531 IETF

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cisco_lad2004 Sat, 04/19/2008 - 00:39
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1st of all u have to be realistic. what is your ratio BW/customer ??

if you cannot buy more capacity than what u have now, you can implement QOS and ensure scavenger and peer 2 peer traffic is dropped.

for example you priorities ur email, DNS service and http.

but I think ur problem is the available BW shared by so many users.



ROBERTO TACCON Sat, 04/19/2008 - 18:49
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which are the configuration timers parameters of the nat fot tcp /udp ? and for the FW inspection ?

with the nbar feature wich P2P protocols the router find ?

can you paste the sh ver/run/nbar configuration ?

ROBERTO TACCON Mon, 04/21/2008 - 14:55
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? Why on the router conf. You choose the:

ip cef load-sharing algorithm tunnel

With the snmp have you check the load-sharing between the serial interfaces (with time frame do you use to pool the interface (5 minutes or less: try 5/10 seconds)?

Are the IP traffic shared well ?


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