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billhagen-sp
New Contributor

Netvanta 3200 as a media converter?

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New here, apologies if this has been answered already...did a search couldn't really find an answer.

Our situation is this: We have a T1 line coming in from a provider. We have an outside firm that supports a piece of equipment on our premise. They want remote access to support the equipment, so they've provided a pre-configured sonicwall tz205 to plug between the T1 and their equipment. It somehow didn't dawn on any of us that we can't plug the T1 into the sonicwall!  So, now we need to convert the T1 to ethernet.

I called Adtran looking for a media converter; they told me the Netvanta 3200 will do the job...I just have to configure bridge mode, or something like that.

Can anybody help me get this device setup as a (very, very expensive) media converter?

Thanks!

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jayh
Honored Contributor
Honored Contributor

Re: Netvanta 3200 as a media converter?

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You will need to know the encapsulation and parameters for the T1 from the provider.  Assuming ppp, something like this should work:

bridge 1 protocol ieee

!

interface t1 0/1

  description T-1 from provider

  tdm-group 1 timeslots 1-24 speed 64

  no shutdown

!

interface ppp 1

  no ip address

  no shutdown

  cross-connect 1 t1 0/1 1 ppp 1

  bridge-group 1

!

!

interface eth 0/1

  description Ethernet to Sonicwall

  no ip address

  no shutdown

  bridge-group 1

Note that you won't be able to administer the device other than via the console unless you configure IRB and assign an IP from the range going to the Sonicwall to the T1.  A simple bridge won't need a lot of configuration but having access to the device for troubleshooting can be handy.

If this T1 is an Internet T1, then the usual situation is to have the 3200 act as a router and not a bridge.  The provider will typically assign a /30 to the T1 itself and a separate subnet for use by the equipment on-site.  There are other options regarding the T1 itself that may need tweaks, such as if it uses a different encapsulation such as HDLC or frame-relay, if the line-coding or framing is not standard, which side provides clocking, and if it is sub-rate with fewer than 24 channels in use.  It would be a good idea to get all of the specifics of the T1 from the provider, both layer 2 and layer 3.

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jayh
Honored Contributor
Honored Contributor

Re: Netvanta 3200 as a media converter?

Jump to solution

You will need to know the encapsulation and parameters for the T1 from the provider.  Assuming ppp, something like this should work:

bridge 1 protocol ieee

!

interface t1 0/1

  description T-1 from provider

  tdm-group 1 timeslots 1-24 speed 64

  no shutdown

!

interface ppp 1

  no ip address

  no shutdown

  cross-connect 1 t1 0/1 1 ppp 1

  bridge-group 1

!

!

interface eth 0/1

  description Ethernet to Sonicwall

  no ip address

  no shutdown

  bridge-group 1

Note that you won't be able to administer the device other than via the console unless you configure IRB and assign an IP from the range going to the Sonicwall to the T1.  A simple bridge won't need a lot of configuration but having access to the device for troubleshooting can be handy.

If this T1 is an Internet T1, then the usual situation is to have the 3200 act as a router and not a bridge.  The provider will typically assign a /30 to the T1 itself and a separate subnet for use by the equipment on-site.  There are other options regarding the T1 itself that may need tweaks, such as if it uses a different encapsulation such as HDLC or frame-relay, if the line-coding or framing is not standard, which side provides clocking, and if it is sub-rate with fewer than 24 channels in use.  It would be a good idea to get all of the specifics of the T1 from the provider, both layer 2 and layer 3.

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billhagen-sp
New Contributor

Re: Netvanta 3200 as a media converter?

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Well, as it turns out, we had our wires crossed and actually *did* need a router...not just a media converter. So we used an existing spare Cisco 1841, and all is working now.

Thanks for the help jayh!