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Point-to-Point T1

Posted on 2004-10-06
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Last Modified: 2012-07-22
Hi All,
     Fist off I am a newbie at network engineering so please keep that in mind.  We have a point-to-point T1 in place between our office and our DR facilicty.  At the office we have a CISCO 2600 with a CSU/DSU WIC and Fast Ethernet card.  At the other end we have an ADTRAN with a CSU/DSU WIC and again an Ethernet port.  Reading the config docs for both the CISCO and ADTRAN the command line interface is ironically very similar.  My question is how should I set this up and what at the settings that need to be set on the router.  I have gone through the CISCO docs and configured the FastEthernet and that seems fine.  I tried to configure the WIC but no matter what I do the status stil shows as being down.  The FastEhernet has an IP address of 192.168.2.1, what is recommend to have the WIC's at both ends be?  Maybe 192.168.2.1 at one end and 192.168.2.2 at the other?

Thanks for any guidence you can provide.
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Question by:motorhead4
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lrmoore earned 125 total points
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If you have a point-point T1, you can choose the encpasulation. if none is specified, then it defaults to HDLC, which is OK..

Example Cisco end:

!
interface fast 0/0
 no shutdown  <== important!
 ip address 192.168.2.1 255.255.255.0
!
interface serial 0/0
 no shutdown
 ip address 192.168.3.1 255.255.255.0
!
ip route 0.0.0.0 0.0.0.0 192.168.2.x  <== whatever is your default gateway out of the LAN
router ospf 101
  network 192.168.3.0 0.0.0.255 area 0
  no auto-summary
  redistribute connected
  default-information originate

On ADTRAN side, very similar (use same cisco commands)

Interface FastEthernet
  ip address 192.168.4.1 255.255.255.0
  no shutdown  <== not sure this is required on Adtran
!
interface serial 0/0
  ip address 192.168.3.2 255.255.255.0
!
router ospf 101
  network 192.168.3.0 0.0.0.255 area 0
  no auto-summary
  redistribute connected
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by:motorhead4
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Thanks for getting back to me.  Quick question on the following command:
ip route 0.0.0.0 0.0.0.0 192.168.2.x  <== whatever is your default gateway out of the LAN

Obviouly the Fast 0/0 goes to the firewall.  So if my Fast 0/0 is 192.168.195.1, would I enter the command as follows?
ip route 0.0.0.0 0.0.0.0 192.168.2.1  <== whatever is your default gateway out of the LAN
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by:lrmoore
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I'm assuming that you have another local gateway that provides Internet connectivity. Could be a firewall or another router on the local lan.

   ip route 0.0.0.0 0.0.0.0 192.168.195.x  
where "x" = the IP address of said firewall/router/gateway...
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by:motorhead4
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Firewall.  Got it.  Thanks.
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by:motorhead4
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Fast is up but serial is still showing as down???
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by:lrmoore
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Both sides have to be configured and connected.
Can you post result of "show interface serial 0/0"
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by:motorhead4
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So that would mean the ADTRAN would need to be up and running which it is not.  So my guess is that would be the problem.
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by:lrmoore
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Yep, could be....
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by:lrmoore
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What kind of firewall do you have? You might need to enter a static route for the remote LAN subnet, participate in the OSPF process, or maybe enable RIP between the firewall and router...

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by:motorhead4
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SonicWall Pro 3060
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by:lrmoore
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According to documentation, SonicWall Pro 3060, if running SonicOS Enhanced 2.5, will support OSPF.. I've never set it up on them before so I can't be much help on that particular aspect, but it should be easy enough for you to setup a static route.
Example:
Remote LAN subnet: 192.168.4.0 / 255.255.255.0
Gateway: 192.168.195.1   <== your Cisco Fast 0/0 interface
Interface: Inside LAN


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by:motorhead4
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We are running Enhanced.  That not be much trouble, and if so I there is support it pretty good.  Thank you again for your help and quick response.  It is greatly appreciated.  I think the first thing I need to do is get to our DR center and get the ADTRAN online.
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by:lrmoore
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Any luck in getting your Adtran online?

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by:motorhead4
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Tomorrow.  I will heading down there tomorrow to get the ADTRAN up and running.  I will keep you posted.
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by:lrmoore
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Points to lrmoore..
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