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how to achieve web server publish redundency?

alanlin_cngz
Level 1
Level 1

Hi,

We would like to publish a web server with 2 internal IP address to 2 internet address for external visit.

we use policy based routing on inside interface of a 2621XM router, policy route each web server internal IP to each internet connection.and then use static NAT to publish the web server. question is:

1.will this configuration work?

2.what difference when using [NAT - Ability to Use Route Maps with Static Translations]

3.anyone can give me some hints about these command?what do they mean?

interface Ethernet3

ip address 172.68.1.100 255.255.255.0

ip nat outside

media-type 10BaseT

!

interface Ethernet4

ip address 192.68.1.100 255.255.255.0

ip nat outside

media-type 10BaseT

!

interface Ethernet5

ip address 11.1.1.100 255.255.255.0

ip nat inside

media-type 10BaseT

!

router rip

network 172.68.0.0

network 192.68.1.0

!

ip nat inside source static 11.1.1.2 192.68.1.21 route-map isp2

ip nat inside source static 11.1.1.2 172.68.1.21 route-map isp1

ip nat inside source static 11.1.1.1 192.68.1.11 route-map isp2

ip nat inside source static 11.1.1.1 172.68.1.11 route-map isp1

access-list 101 permit ip 11.1.1.0 0.0.0.255 172.0.0.0 0.255.255.255.

access-list 102 permit ip 11.1.1.0 0.0.0.255 192.0.0.0 0.255.255.255

!

route-map isp2 permit 10

match ip address 102

set ip next-hop 192.68.1.1

!

route-map isp1 permit 10

match ip address 101

set ip next-hop 172.68.1.1

any information is appreciated!

Alan.L

1 Reply 1

sbilgi
Level 5
Level 5

The advantage of using Route-maps is that under the match command you can have more options other than source IP address. For example, under the route-map, match interface or match ip next-hop can be specified. By using route-maps , we can specify the ip address as well as the interface or the next-hop address to which the packet is to be forwarded. So, route-maps with NAT are used in scenario where the subscriber is multihoming to different ISPs.

http://cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080093fca.shtml