Cisco Next-Hop Routing
======================

Shanker Balan
http://shankerbalan.com/

Overview
========

- 1 128k Cisco router connected to ISP1 with a modem pool attached to it
- 1 512k Zyxel prestige DSL router connected to ISP2
- Both the routers are interconnected via the gateway and not directly

The idea is to allow the dial-up users to use the faster 512k DSL link for
enahnced browsing. This can be achieved on the Cisco router itself by using
"nexthop routing" protocol.


                        [ modem pool ] (192.168.10.10/11)
                              .
                              .
                              .
                          +-------+
                          | CISCO | ---> ISP1 (128 Kb)
                          +-------+
                         /    .
                        /     .
                       /      .
            +---------+       .
            | Gateway |       .
            +---------+       .
                       \      .
                        \     .
                         \    .
                          +-------+
                          | ZYXEL | ---> ISP2 (512 Kb) (yyy.yyy.yy.yyy)
                          +-------+


The Configuration
=================

!
interface Serial1/0
 physical-layer async
 ip unnumbered FastEthernet0/0
 no ip directed-broadcast
 encapsulation ppp
 ip policy route-map dialup
 ip tcp header-compression passive
 async mode interactive
 peer default ip address 192.168.10.10
 no fair-queue
 ppp authentication pap
!
interface Serial1/1
 physical-layer async
 ip unnumbered FastEthernet0/0
 no ip directed-broadcast
 encapsulation ppp
 ip policy route-map dialup
 async mode interactive
 peer default ip address 192.168.10.11
 no fair-queue
 ppp authentication pap
!
access-list 110 permit ip host 192.168.10.11 any
access-list 111 permit ip host 192.168.10.10 any
dialer-list 1 protocol ip permit
route-map dialup permit 10
match ip address 110 111
set ip default next-hop yyy.yyy.yyy.yyy
!

URLs:

Policy-Based Routing Using the set ip default next-hop and set ip next-hop Commands Configuration Example:
http://www.cisco.com/en/US/tech/tk364/tk871/technologies_configuration_example09186a00801f3b54.shtml#casethree


** Changelog **

* Thu Feb  5 16:03:44 IST 2004
- 1st cut