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kzanni
New Contributor

2 Netvanta 3205 trying to talk across a T1

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So I ran across this today and I have played around with routers and T1's before but I need a little help here.  I have 2 netvanta 3205 each with a card in them that has a t1, dsx1 and a dbu port on it. The firmware is 15.05.00.   We have a point to point T1 and just trying to get the 2 routers to talk back and forth so we can transfer some audio data across it. Any help on configurations would be great i took a look at it and tried a few things but couldn't make it work.

Thank you.

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petersjncv
Contributor
Contributor

Re: 2 Netvanta 3205 trying to talk across a T1

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I am assuming this is a standard telco provided T1 between your 2 routers.  Most T1's delivered today are ESF/B8ZS line coding/framing by default.  You need to match the telco coding and framing so I would recommend changing back to those settings (check with your provider as to what they should be if you aren't sure).  T1 protocol can be whatever you set on the router.  Remember, whatever is set on one side will need to be set on the other.

You are focused on the config or routing being an issue, but you didn't say how you determined that.  When you plug the T1 into the router, does the T1 interface go into an UP/UP state?  What about the PPP group?  Does PPP go into an UP/UP state with LCP OPEN?  Do you take any errors on the T1 interface?  With incorrect coding and framing you almost definitely will take errors, so clear that up before checking for errors.

Another thing I noticed was the IP addressing.  You only sent one config, but your PPP interface is setup as "192.168.1.1 255.255.255.0".  Your Ethernet interface is "10.10.10.3 255.255.255.0", but you also have a route for 10.10.10.0/24 pointing to "192.168.0.1".

So first things first.  I would use a /30 network for the point-to-point T1 connection.  Your IP addressing on the connecting interfaces must be in the same subnet as one another.  Therefore side A should be something like "192.168.1.1 255.255.255.252" and side B should be "192.168.1.2 255.255.255.252".  Routes on side A going to side B should be "x.x.x.x y.y.y.y 192.168.1.2" and vice versa "z.z.z.z y.y.y.y 192.168.1.1".

As far as routable networks, you won't be able to use the same Ethernet subnet on both sides.  Side A should be something like "10.10.10.x/24" and side B should be something like "10.10.11.x/24".  These are examples, set this up at your discretion.

Hope this helps.

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Anonymous
Not applicable

Re: 2 Netvanta 3205 trying to talk across a T1

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This provides a simple example of the programming of the interfaces and route tables.  This configuration uses a PPP interface for the T1 connection.   I hope this helps.

Router A

!

interface eth 0/1

  ip address  192.168.1.1 255.255.255.0

  no shutdown

!

interface t1 1/1

  description  P2P Router B

  clock source internal

  tdm-group 1 timeslots 1-24 speed 64

  no shutdown

!

interface ppp 1

  ip address  172.16.1.5  255.255.255.252

  ip access-policy Private

  qos-policy out VoIP

  no shutdown

  cross-connect 1 t1 1/1 1 ppp 1

!

!

ip route 192.168.2.0 255.255.255.0 ppp 1

Router B

!

interface eth 0/1

  ip address  192.168.2.1 255.255.255.0

  no shutdown

!

interface t1 1/1

  description P2P Router A

  clock source line

  tdm-group 1 timeslots 1-24 speed 64

  no shutdown

!

interface ppp 1

  ip address  172.16.1.6  255.255.255.252

  ip access-policy Private

  qos-policy out VoIP

  no shutdown

  cross-connect 1 t1 1/1 1 ppp 1

!

!

ip route 192.168.1.0 255.255.255.0 ppp 1

kzanni
New Contributor

Re: 2 Netvanta 3205 trying to talk across a T1

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Thank you very much I will give it a shot today or tomorrow and then let you know how it works.

kzanni
New Contributor

Re: 2 Netvanta 3205 trying to talk across a T1

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So I was able to get those settings in to the routers but no dice but there is progress the tx and rx lights on both routers are blinking now.  Any other tips or settings changes i can make to get these guys talk.

Anonymous
Not applicable

Re: 2 Netvanta 3205 trying to talk across a T1

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Can you send me the config files?

Sent from my Verizon Wireless 4G LTE DROID

kzanni
New Contributor

Re: 2 Netvanta 3205 trying to talk across a T1

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Will do as soon as i can get them.

On Wed, Feb 12, 2014 at 11:23 AM, vmaxdawg05 <

kzanni
New Contributor

Re: 2 Netvanta 3205 trying to talk across a T1

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Ok sorry for the delay its been a little hard getting to the places where these are setup here is the config.  Now I have tried the different framing options and coding and the speed of the time slots to see if that will get them to start working. I think I might be looking at a routing issue or something hopefully this helps and we can get this up and working.  Thank you for all the help thus far.

!

!

! ADTRAN, Inc. OS version 15.02.00

! Boot ROM version 12.02.00

! Platform: NetVanta 3205 AC, part number 1202870L1

! Serial number LBADTN0810AL362

!

!

hostname "Router"

enable password password

!

clock timezone -8

!

ip subnet-zero

ip classless

ip routing

!

no auto-config

!

event-history on

no logging forwarding

no logging email

logging email priority-level info

!

no service password-encryption

!

username "admin" password "password"

!

banner motd #

                ****** Important Banner Message ******

Enable and Telnet passwords are configured to "password".

HTTP and HTTPS default username is "admin" and password is "password".

Please change them immediately.

The ethernet 0/1 interface is enabled with an address of 10.10.10.1

Telnet, HTTP, and HTTPS access are also enabled.

To remove this message, while in configuration mode type "no banner motd".

                  ****** Important Banner Message ******

#

!

ip policy-timeout tcp telnet 14400

!

no ip firewall alg msn

no ip firewall alg h323

!

!

!

!

!

!

!

!

ip dhcp-server excluded-address 10.10.10.0 10.10.10.3

ip dhcp-server excluded-address 10.10.10.26 10.10.10.255

!

ip dhcp-server pool "Private"

  network 10.10.10.0 255.255.255.0

  netbios-node-type h-node

  default-router 10.10.10.3

!

!

!

interface eth 0/1

  ip address  10.10.10.3  255.255.255.0

  no shutdown

!

!

!

!

interface t1 1/1

  description Studio

  framing d4

  clock source internal

  coding ami

  tdm-group 1 timeslots 1-24 speed 56

  no shutdown

!

interface t1 1/2

  line-length 0

  shutdown

!

interface ppp 1

  ip address  192.168.1.1  255.255.255.0

  no shutdown

  cross-connect 1 t1 1/1 1 ppp 1

!

!

!

!

!

!

ip access-list extended web-acl-1

  remark any:4444 -> 192.168.1.4:4444

  permit tcp any eq 4444 192.168.1.0 0.0.0.255 eq 4444   log

!

ip policy-class "Audio Stream"

  nat source list web-acl-1 interface eth 0/1 overload

!

!

!

ip route 10.10.10.0 255.255.255.0 192.168.0.1

!

no ip tftp server

no ip tftp server overwrite

ip http server

ip http secure-server

no ip snmp agent

no ip ftp server

no ip scp server

no ip sntp server

!

!

!

!

!

!

!

line con 0

  no login

!

line telnet 0 4

  login

  password password

  no shutdown

line ssh 0 4

  login local-userlist

  no shutdown

!

!

end

petersjncv
Contributor
Contributor

Re: 2 Netvanta 3205 trying to talk across a T1

Jump to solution

I am assuming this is a standard telco provided T1 between your 2 routers.  Most T1's delivered today are ESF/B8ZS line coding/framing by default.  You need to match the telco coding and framing so I would recommend changing back to those settings (check with your provider as to what they should be if you aren't sure).  T1 protocol can be whatever you set on the router.  Remember, whatever is set on one side will need to be set on the other.

You are focused on the config or routing being an issue, but you didn't say how you determined that.  When you plug the T1 into the router, does the T1 interface go into an UP/UP state?  What about the PPP group?  Does PPP go into an UP/UP state with LCP OPEN?  Do you take any errors on the T1 interface?  With incorrect coding and framing you almost definitely will take errors, so clear that up before checking for errors.

Another thing I noticed was the IP addressing.  You only sent one config, but your PPP interface is setup as "192.168.1.1 255.255.255.0".  Your Ethernet interface is "10.10.10.3 255.255.255.0", but you also have a route for 10.10.10.0/24 pointing to "192.168.0.1".

So first things first.  I would use a /30 network for the point-to-point T1 connection.  Your IP addressing on the connecting interfaces must be in the same subnet as one another.  Therefore side A should be something like "192.168.1.1 255.255.255.252" and side B should be "192.168.1.2 255.255.255.252".  Routes on side A going to side B should be "x.x.x.x y.y.y.y 192.168.1.2" and vice versa "z.z.z.z y.y.y.y 192.168.1.1".

As far as routable networks, you won't be able to use the same Ethernet subnet on both sides.  Side A should be something like "10.10.10.x/24" and side B should be something like "10.10.11.x/24".  These are examples, set this up at your discretion.

Hope this helps.

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kzanni
New Contributor

Re: 2 Netvanta 3205 trying to talk across a T1

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Well guys I think I got it decided to bring both routers to my shop used a t1 crossover cable between them. With all the info you guys gave to me I was able to get them both to talk and was able to ping machines on the other end of each router. Going to put them back in the field today or tomorrow wish I could mark all of the responses as correct answers.  They all helped very much thank you again.