From: Nigel Taylor (nigel_taylor@hotmail.com)
Date: Sat Nov 02 2002 - 16:05:27 GMT-3
Hunt,
I'm a bit lost on what exactly it is you're trying to accomplish?
I understand that you have 3 servers with mirrored content and I'm guessing
you would like users to access any of the three devices as requested. I
don't see how NAT will help you out in this situation. If you use a static
mapping then you'll have to define a different "virtual IP" for each device.
However, if you use port mapping then the ports will be unique(unless
statically defines). Why not simply define the 3 servers in DNS this way
the hostname(URL) resolves to any of the 3 servers. Additionally, you could
opt for one of the content switches form Cisco, foundry, etc...
HTH
Nigel
----- Original Message -----
From: "Hunt Lee" <ciscoforme3@yahoo.com.au>
To: <ccielab@groupstudy.com>
Sent: Saturday, November 02, 2002 6:25 AM
Subject: Another NAT problem
> Group,
>
> I have run into another NAT problem. This time, what I'm trying to
achieve is
> that I have 3 servers with mirrored content, & I want to create a "virtual
> server" with an IP of 100.20.1.1
>
> ServerA (192.168.1.2/24)
> \
> ServerB (192.168.1.3/24)- RTA ---- RTB (207.35.14.81 /30)
> /
> ServerC (192.168.1.4/24)
>
> But when I tried to ping the Virtual IP from RTB, no NAT translation is
taking
> place, and hence the ping is unsucessful.
>
>
> here's RTA config...
>
> interface FastEthernet0/0
> description Inside NAT - to the 3 servers
> ip address 192.168.1.1 255.255.255.0
> ip nat inside
> no ip route-cache
> no ip mroute-cache
> duplex auto
> speed auto
> !
> interface Serial0/0
> description to Outside - to RTB
> ip address 207.35.14.82 255.255.255.252
> ip nat outside
> no ip route-cache
> no ip mroute-cache
> clockrate 64000
>
>
> ip nat pool PoolOne 192.168.1.2 192.168.1.4 prefix-length 24 type rotary
> ip nat inside destination list 5 pool PoolOne
>
> access-list 5 permit 100.20.1.1
>
>
> ****** I can ping fine to the Internal local IPs of the 3 servers *****
>
> RTB#ping 192.168.1.2
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 32/33/36 ms
> RTB#ping 192.168.1.3
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 192.168.1.3, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 32/34/36 ms
> RTB#
>
>
>
> **** but when I try to ping the Virtual IP, nothing happens ****
>
> RTB#ping 100.20.1.1
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 100.20.1.1, timeout is 2 seconds:
> U.U.U
> Success rate is 0 percent (0/5)
> RTB#
>
>
> RTA#sh ip nat translations
>
> RTA#
>
> Any help will be greatly appreciated.
>
> Regards,
> H.
>
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This archive was generated by hypermail 2.1.4 : Tue Dec 03 2002 - 07:22:51 GMT-3