Load balancing 1841 with 2 adsl wic's in the same lan.

[alvergam39]

I have Cisco 1841 router with 2 adsl wic's ,2 Internet connections from the same ISP and i 'd like to do load balancing per-destination in the same lan. I have IOS 12.4(1a).

I 'm trying to set up fastethernet0/0 , 2 atm's and 2 dialers.

I want to setup with nat inside in fastethernet0/0 and nat outiside on both dialers,with pap authentication pvc 8/35 , ip address negotiated on dialers,

encapsulation aal5mux ppp dialer.

Can you help me with the config file?

[nethelper]

Hello,

here is a sample configuration for your setup.

ip cef

!

interface FastEthernet0/1

ip address 192.168.1.1 255.255.255.0

ip nat inside

!

interface ATM0

no ip address

no ip route-cache

no atm ilmi-keepalive

dsl operating-mode auto

!

interface ATM0.1 point-to-point

no ip route-cache

pvc 8/35

encapsulation aal5mux ppp dialer

dialer pool-member 1

!

interface ATM0.2 point-to-point

no ip route-cache

pvc 8/35

encapsulation aal5mux ppp dialer

dialer pool-member 2

!

interface Dialer1

description ISP1_Connection_1

ip address negotiated

ip mtu 1452

encapsulation ppp

dialer pool 1

dialer-group 1

ppp authentication pap callin

ppp pap sent-username USERNAME password PASSWORD

!

interface Dialer2

description ISP1_Connection_2

ip address negotiated

ip mtu 1452

encapsulation ppp

dialer pool 2

dialer-group 1

ppp authentication pap callin

ppp pap sent-username USERNAME password PASSWORD

!

ip nat inside source route-map ISP1_Connection_1 interface Dialer1 overload

ip nat inside source route-map ISP1_Connection_2 interface Dialer2 overload

!

access-list 1 permit 192.168.1.0

!

route-map ISP1_Connection_1 permit 10

match ip address 1

match interface Dialer1

!

route-map ISP1_Connection_2 permit 10

match ip address 1

match interface Dialer2

!

ip route 0.0.0.0 0.0.0.0 Dialer1

ip route 0.0.0.0 0.0.0.0 Dialer2

!

dialer-list 1 protocol ip permit

Regards,

Nethelper

[alvergam39]

Thank you very much nethelper.

I 'd like to ask you about the physical atm interfaces atm0/0/0 and atm0/1/0 .

I do not configure the atm0/1/0 interface ?

I have 48 pc's in the lan.

All the pc's they 'll share both connections from atm0/0/0 ?

For example:

PC01 going internet from connection ISP1

pc02 going internet from connection ISP2

pc03 going internet from connection with less load.

Best Regards

alvergam39

[nethelper]

Hello,

the sample configuration given is based on two PVCs on the same physical interface. In your case, with physical interfaces ATM0/0/0 and ATM0/1/0, the configuration would look like this:

interface ATM0/0/0

no ip address

no ip redirects

no ip unreachables

no ip proxy-arp

ip route-cache flow

no atm ilmi-keepalive

!

interface ATM0/0/0.1 point-to-point

no ip redirects

no ip unreachables

no ip proxy-arp

pvc 8/35

encapsulation aal5mux ppp dialer

dialer pool-member 1

!

interface ATM0/1/0

no ip address

no ip redirects

no ip unreachables

no ip proxy-arp

ip route-cache flow

no atm ilmi-keepalive

dsl operating-mode auto

!

interface ATM0/1/0.2 point-to-point

no ip redirects

no ip unreachables

no ip proxy-arp

pvc 8/35

encapsulation aal5mux ppp dialer

dialer pool-member 2

The load balancing is per-destination (which is the default). That means that e.g. PC01 going to www.cisco.com will go through ISP1, PC02 going to www.microsoft.com will go through ISP2, and so forth.

Regards,

Nethelper

[alvergam39]

Thank You again nethelper .

You help me a lot,and your configuration file was right.

Best Regards

alvergam39.

[alvergam39]

Hello again nethelper

Thank you very much for your config.

I have a little problem with DHCP server in my Lan.

I have a DHCP server in my network at 192.168.0.1 , and when i plugging the router on the lan i havent internet .

It must work as relay agent ?

Can you help me with this .

Best Regards

alvergam39