New User: How do you configure a Cisco 1721 router with a new T-1 line?

Posted on 2005-04-13
Medium Priority
Last Modified: 2013-12-12
I have a new T-1 line and Cisco 1721 router.  I would like to configure the router with the new T-1. Where do I start?
Question by:veyron55
  • 2
LVL 79

Expert Comment

ID: 13780590
You  need to have an IP address for the T1 interface
You need to know the encapsulation (PPP | Frame-relay | HDLC)
Is this an Internet connection? You need default gateway
Do you have a firewall behind the router, or is this your security router/firewall?
Do you have the internal WIC-T1-DSU module, or are you using an external CSU/DSU?

Basic config example
  interface serial 0/0
    ip address a.b.c.d
    no shutdown

 sho interface serial 0/0
Look for indications : line is UP | DOWN   protocol is UP | DOWN
Looking for UP | UP
LVL 79

Accepted Solution

lrmoore earned 375 total points
ID: 13793511
Any luck? Do you need more information?

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