Network / Routing Issue Help!!!!!!!!!

I would presume this is a NAT problem. Have you configured NAT at all?

Disable IPv6 on the workstation until you rectify your IPv4 Problem.

Any Access-Lists configured on the router?

If you are still hav> Gang,

Currently, I have not enabled nat or any accesses lists as I know that would only complicate the problem. Below is the running config posted as requested take a look and see if you have any ideas this it really a strange issue.

Thanks

Current configuration : 1569 bytes ! version 12.2 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname Router ! logging queue-limit 100 enable secret 5 $1$/jCz$Tuco7pQuAdj5Rv8GvNjtz0 ! memory-size iomem 10 ip subnet-zero ! ! ip name-server 172.16.1.8 ip dhcp excluded-address 172.16.1.1 172.16.1.10 ! ip dhcp pool internal-net-pool network 172.16.1.0 255.255.255.0 default-router 172.16.1.100

ip dhcp excluded-address 172.16.1.1 172.16.1.10 ! ip dhcp pool internal-net-pool network 172.16.1.0 255.255.255.0 default-router 172.16.1.100 dns-server 172.16.1.8 netbios-name-server 172.16.1.8 lease infinite ! ip audit notify log ip audit po max-events 100 no voice hpi capture buffer no voice hpi capture destination ! ! mta receive maximum-recipients 0 ! interface FastEthernet0/0 ip address dhcp client-id FastEthernet0/0 duplex auto speed auto pppoe enable ! interface BRI0/0 no ip address shutdown ! interface FastEthernet0/1 ip address 172.16.1.100 255.255.255.0 duplex auto speed auto ! router rip network 68.0.0.0 network 172.16.0.0 ! ip nat pool ipnatpool 172.16.1.10 172.16.1.254 netmask 255.255.255.0 ip nat inside source list 1 interface FastEthernet0/1 overload ip http server no ip http secure-server ip classless ip route 172.16.1.0 255.255.255.0 FastEthernet0/0 ! call rsvp-sync ! ! mgcp profile default ! dial-peer cor custom

Not a strange issue at all, plain and simple, your router is not configured properly.

Many things you need/don't need:

1, You NEED to nat to goto the internet! They will NOT route your private IP's which is what you are doing without using nat. 2, Nat...it's all kindsa messed up, pools are wrong, statements are wrong. 3, You need to specify a default route. It's preferable to do it via an IP, but in this case you don't know it yet. 4, You do not need the 172.16.1.0 route as it's a directly connected interface, the router alreay knows about that. 5, You most likely do not need rip. I have a feeling this is the only router on your network. 6, DHCP pools, they are duplicates, not sure why the router allowed you to put them in, maybe you messed up on copy/paste?

Paste this into the router:

Config t no ip nat inside source list 1 interface FastEthernet0/1 overload no ip nat pool ipnatpool 172.16.1.10 172.16.1.254 netmask 255.255.255.0 access-list 1 permit 172.16.1.0 0.0.0.255 ip nat inside source list 1 interface FastEthernet0/0 overload ip route 0.0.0.0 0.0.0.0 f0/0 no ip route 172.16.1.0 255.255.255.0 f0/1 no router rip int f0/0 ip nat outside int f0/1 ip nat inside exit exit wr mem

-Brian

Need I say more........ Thanks!!!!!!!!!!!!

D:\\>ping 68.2.112.1

Pinging 68.2.112.1 with 32 bytes of data:

Reply from 68.2.112.1: bytes=32 time=10ms TTL=63 Reply from 68.2.112.1: bytes=32 time=10ms TTL=63 Reply from 68.2.112.1: bytes=32 time=10ms TTL=63 Reply from 68.2.112.1: bytes=32 time=25ms TTL=63

Ping statistics for 68.2.112.1: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 10ms, Maximum = 25ms, Average = 13ms

The IP address range you are using for your network belongs in the

172.16.0.1 through 172.31.255.254 (172.16.0.0/12) RFC 1918 defined class-B private address range. To facilitate communicationg between any RFC 1918 addresses and host on the internet, a network translating device such as a NAT Router or proxy is required.

Routers on ISPs will not accept routes pointing to RFC 1918 networks and therefore will suppress your RIP updates. So if your ISP has no route to hosts on your network, no traffic will be returned, which explains why you can ping the ISPs router from your router but not your workstation.

NAT does cause complications but you have no other alternative, you must implement NAT, and since you use one public IP address, NAT overloading (PAT) is the type of NAT you need.

Here is a sample config that might help you.

interface FastEthernet0/0 ip address dhcp client-id FastEthernet0/0 ip nat outside pppoe enable ! interface FastEthernet0/1 ip address 172.16.1.100 255.255.255.0 ip nat inside ! ip nat inside source list 1 interface FastEthernet0/1 overload ! access-list 1 permit 172.16.0.0 255.255.0.0

John Smith wrote:

Hi John,

Glad it's working. Now you should set a proper IP route. From your router do a trace to something on the internet, say 4.2.2.2. The first hop you hit is now your default gateway. I'm pretty sure it was f0/0 that was your outside, if not change the f0/0 to f0/1. The X.X.X.X below represent the IP that you found as your first hop.

What this will gain for you is performance. Your router will now immeadiatly forward that packet rather than having to arp for the IP your trying to get to.

conf t no ip route 0.0.0.0 0.0.0.0 f0/0 ip route 0.0.0.0 0.0.0.0 X.X.X.X exit wr mem

-Brian

Brian thanks for all your help!!!!!!!! I however used the ip address dhcp client-id fa0/0 and the ISP gave me the default route see below

show ip route

Gateway of last resort is 68.98.0.1 to network 0.0.0.0

68.0.0.0/20 is subnetted, 1 subnets C 68.98.0.0 is directly connected, FastEthernet0/0 172.16.0.0/24 is subnetted, 1 subnets C 172.16.1.0 is directly connected, FastEthernet0/1 S* 0.0.0.0/0 [254/0] via 68.98.0.1

Get this though i did the traceroute to 4.2.2.2 and look what comes back my first hop is this 10.x.x.x network what is my isp doing. I found this a couple of days ago while working on the previous nat issue. I wanted to set my default route for my router so I did a traceroute to my isp and it came back with this 10.x.x.x network and I thought forsure this would not be my default route, but isp is setting it to a 68 address as the default route so I am still confused.

In addition my isp puts in the df-route (next hop) as a 68 address see above sh ip route. So I am wondering what my df-route should really be?

Any thoughts?

1 10.84.0.1 12 msec 8 msec 12 msec 2 ip68-2-4-65.ph.ph.cox.net (68.2.4.65) 12 msec 8 msec 8 msec 3 68.2.13.222 8 msec 20 msec 8 msec 4 68.2.13.122 20 msec 8 msec 12 msec 5 68.2.13.22 12 msec 8 msec 12 msec 6 68.2.13.26 12 msec 12 msec 12 msec 7 68.2.13.30 12 msec 16 msec 16 msec 8 68.2.13.34 12 msec 16 msec 12 msec

to network 0.0.0.0

The 10.84.0.1 address isn't strange at all, it's your cable modem. 99% is isp's using cable modems use private nets on them for management. As far as the 68.98.0.1 as a default route, your ISP must be using hsrp or vrrp on their interfaces which explains why your first real hop is not the .1, your seeing the physical.

-Brian

Brain,

Thanks so much for the help everything is working great now. Its time for the bri backup in a couple of weeks have to order the isnd bri channel. Again thanks for the help and the time!!!!!!

John