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tommycole

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Cisco 1721, T1, and PAT

I have a new Cisco 1721 router, a freshly hot T1 line, and about 40 workstations.

At this time the internal network is getting IP addresses from our server that is running DHCP, and assigning addresses in the range of 192.168.2.10 - 192.168.2.100

My new ISP has given me the following information
 CSU Info:
Clock Source: Internal
Channels 1-24
Channel rate: 64K
Framing ESF
Line coding: B8zs

Router info:
Encapsulation: PPP
Ip Address 209.137.150.40
default gateway: 209.137.150.41
Subnet mask: 255.255.255.252

LAN side:
IP Address: 209.137.143.192
Subnet mask: 255.255.255.248
Usable addresses :  209.137.143.193 to .197 with a subnebt mask of 255.255.255.248

Using this information, I really need to know the configuration for using this Cisco router.

If I am correct I will have to use PAT because I have so few IP addresses available, and would like to reserve one of them in case I have to set up a SMTP server later.

Please Help !

Thank you!
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Jharper
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tommycole

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I don't know why, but that won't work.  I have emaied the tech support for the ISP to make sure the circuit is still turned up.

Thanks anyway.  I am sure the problem lies elsewhere than in your IOS script.
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mrpez1
What do you get with a show interface s0? Are the interface and line protocol up?
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tommycole

ASKER

Yes, The FastEthernet0 and Serial0 are both up.
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Jharper
Can you ping out to the internet from your router?  Sometimes they forget to route your block of internal IPs to your router.  If you can ping from inside the router into the Intenet it means that they need to route these IPs to your router and your PAT address won't work until they complete this.

Jharper
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Scotty_cisco
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Jharper
You're right, I accidently cut that access-list out when I was cleaning it up for him.

Jharper
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tommycole

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Thank you all very much !