Load balance for wan link

manoj.kumar0074 · ‎11-30-2010

Dear All,

I want to configure laod balance or aggregate model for my wan link.I have cisco router and 2 link from different ISP.

On FE 0/3/0 , I have a 45 MBPS from Tata and on FE0/3/1 , I have 45 MBPS from MTNL. I want this go work on a load balance or aggregate model. Can you please help me...................

Is there any documents regarding this schenario?

Roman Rodichev · ‎11-30-2010

Unless you are running BGP with both providers, you can only load balance outbound traffic. Two static 0.0.0.0 0.0.0.0 routes to both providers would achieve that. If you want to load balance inbound traffic, you'll need to run BGP with both providers.

Tharak Abraham · ‎12-02-2010

Manoj,

You told that you have two DS3 circuits from the provider and its WAN.

Is it an Enterprise or SP network ?

I assume its not dual homed to the Internet..-:)

But again cant rule out that these days.

The most scalable solution is to run BGP between your endpoints considering the same enterprise.

Considering the fact that you have only one router where both the connections are getting terminated.

Try out "maximum-paths 2'

If you are peering with the SP then you will have to get an AS number, i dont think SP's will entertain private AS numbers and strip it off in their upstream path as said in books.

andre.ortega · ‎12-02-2010

Hi,

see this sample:

Exemplo:

! Interface de saída (WAN1)
interface Ethernet0
description WAN1 Interface
ip address 201.54.3.106 255.255.255.248
ip nat outside
ip virtual-reassembly
hold-queue 100 out
!
!Interface conectada a LAN
interface Ethernet2
description LAN Interface
ip address 192.168.1.204 255.255.255.0
ip nat inside
ip virtual-reassembly
hold-queue 100 out
!
interface ATM0
no ip address
no atm ilmi-keepalive
dsl operating-mode auto
!
! Interface de saída (WAN2)
interface ATM0.3 point-to-point
description WAN2 Interface
ip address 200.168.111.220 255.255.255.192
ip nat outside
ip virtual-reassembly
no snmp trap link-status
pvc 8/35
encapsulation aal5snap
!
!Rotas para os dois gateways
ip route 0.0.0.0 0.0.0.0 200.168.111.193
ip route 0.0.0.0 0.0.0.0 201.54.3.105
!
!NAT dinâmico para os dois links
ip nat inside source route-map RM-1 interface Ethernet0 overload
ip nat inside source route-map RM-2 interface ATM0.3 overload
!
!ACL para permitir a LAN ser nateada
ip access-list extended NATacl
permit ip 192.168.1.0 0.0.0.255 any
!
!Route Maps para os NATs
route-map RM-1 permit 10
match ip address NATacl
match interface Ethernet0
!
route-map RM-2 permit 10
match ip address NATacl
match interface ATM0.3