Load Balancing over 2 ISP conncetions

[shivgahlot]

Hi

I have 2 routers with 1 Mbps internet connection on each. Now I have to do the load balancing between these routers without any inetrnet load balancer.

Please suggest how can I achieve this ???

[guruprasadr]

HI Shiv, [Pls RATE if HELPS]

Load balancing is not possible in a multihomed environment with two ISPs. BGP selects only the single best path to a destination among the BGP paths that are learned from different ASs, which makes load balancing impossible. . However, load sharing is possible in such multihomed BGP networks.

Refer useful link below describing multiple scenario's of BGP environments:

http://cisco.com/en/US/tech/tk365/technologies_configuration_example09186a00800945bf.shtml

Hope I am Informative.

Pls RATE if HELPS

Best Regards,

Guru Prasad R

[tajuddinmd]

Hi Shiv,

What WAN interface is your internet connection is and what is the routing protocol. ans also let your router model.

Taj

[ariela]

In this case another way to investigate, to load balance traffic with two or more ISPs, is the Performance Routing (PfR, named also OER, Optimize Edge Routing):

http://www.cisco.com/go/pfr

HTH

Andrea

[dwtcp]

Hi all,

i have configured oer on a 2811 with two adsls over the same ISP.

Everything works fine BUT... ftp Sessions from inside to outside cannot open!!

Any ideas how to solve this?

here is my config:

LB_2811#

LB_2811#sh run

Building configuration...

Current configuration : 3310 bytes

!

! Last configuration change at 15:39:00 EET Wed Dec 3 2008 by dataways

key chain key1

key 1

key-string xxx

!

!

!

!

!

!

!

!

!

!

!

!

!

!

!

!

!

voice-card 0

!

oer master

max-range-utilization percent 10

logging

!

border 213.140.137.188 key-chain key1

interface FastEthernet0/0 internal

interface Dialer1 external

interface Dialer2 external

!

learn

throughput

delay

periodic-interval 1

monitor-period 2

prefixes 200

aggregation-type prefix-length 32

!

!

oer border

logging

local FastEthernet0/0

master 213.140.137.188 key-chain key1

!

!

!

!

u

!

!

!

interface FastEthernet0/0

description ### Connected to ASA External ###

ip address 192.168.1.18 255.255.255.0 secondary

ip address 213.140.137.188 255.255.255.224

ip nat inside

ip virtual-reassembly

duplex auto

speed auto

!

interface FastEthernet0/1

no ip address

shutdown

duplex auto

speed auto

!

interface ATM0/0/0

no ip address

no atm ilmi-keepalive

pvc 8/35

encapsulation aal5mux ppp dialer

dialer pool-member 1

!

!

interface ATM0/1/0

no ip address

no atm ilmi-keepalive

pvc 8/35

encapsulation aal5mux ppp dialer

dialer pool-member 2

!

!

interface Virtual-Template1

no ip address

!

interface Dialer1

ip address negotiated

ip nat outside

ip virtual-reassembly

encapsulation ppp

load-interval 30

dialer pool 1

dialer-group 1

no cdp enable

ppp authentication pap callin

ppp pap sent-username XXXXXX

!

interface Dialer2

ip address negotiated

ip nat outside

ip virtual-reassembly

encapsulation ppp

load-interval 30

dialer pool 2

dialer-group 1

no cdp enable

ppp authentication pap callin

ppp pap sent-username XXXXXXXXX

!

ip forward-protocol nd

ip route 0.0.0.0 0.0.0.0 Dialer1

ip route 0.0.0.0 0.0.0.0 Dialer2

ip http server

ip http authentication local

no ip http secure-server

ip http timeout-policy idle 60 life 86400 requests 10000

!

!

ip nat inside source list NAT_Traffic interface Virtual-Template1 overload oer

!

ip access-list extended NAT_Traffic

permit ip host 213.140.137.189 any

permit ip 192.168.1.0 0.0.0.255 any

permit ip host 213.140.137.187 any

!

dialer-list 1 protocol ip permit