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Netvanta 3200 | (Interface) Frame Relay, Sub-Relay & Loopback Questions

Good day...

I am replacing an Samsung IBG-1000 for a customer using an Adtran Netvanta 3200. I have contacted the clients provider (MegaPath | T1) and asked for general support however they do not support the Adtran unfortunately and have referred me to try Adtran.

When the Adtran is connected to the client T1 and when viewing the "System Summary" => "WAN Summary" indicates that the "WAN Interface" is UP.

Likewise when viewing the "WAN Interface Encapsulation" status is indicated as ACTIVE.

Firmware Version: R11.4.4

The Questions

1) When viewing the "System Summary" the WARNING: Warning a potential problem has been detected with your system. Please go this troubleshooting page for more detail.

Layer 2 Protocols Error: Error fr1 is administratively up, but the sub interface, fr 1.500 (VC500), is inactive. Make sure fr1 is up. If the problem persists contact your service provider.


This unit is currently disconnected from the circuit, but here is the return from "show interface".

t1 1/1 is DOWN

  Description: fr 1.500

  Transmitter is sending remote alarm

  Receiver has loss of signal, loss of frame

  T1 coding is B8ZS, framing is ESF

  Clock source is line, FDL type is ANSI

  Line build-out is 0dB

  No remote loopbacks, No network loopbacks

  Acceptance of remote loopback requests enabled

  Tx Alarm Enable: rai

  Last clearing of counters 00:49:07

    loss of frame  : 1, current duration 00:49:07

    loss of signal : 1, current duration 00:49:07

    AIS alarm      : 0

    Remote alarm   : 0

  DS0 Status: 123456789012345678901234


  Status Legend: '-' = DS0 is unallocated

                 'N' = DS0 is dedicated (nailed)

  Line Status: -- LOS -- Red -- Tx Yellow --

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

  Current Performance Statistics:

    0 Errored Seconds, 0 Bursty Errored Seconds

    0 Severely Errored Seconds, 481 Severely Errored Frame Seconds

    481 Unavailable Seconds, 0 Path Code Violations

    0 Line Code Violations, 0 Controlled Slip Seconds

    0 Line Errored Seconds, 0 Degraded Minutes

  TDM group 1, line protocol is DOWN

  Encapsulation FRAME-RELAY IETF (fr 1)

    0 packets input, 0 bytes, 0 no buffer

    0 runts, 0 giants, 0 throttles

    0 input errors, 0 CRC, 0 frame

    0 abort, 0 discards, 0 overruns

    0 packets output, 0 bytes, 0 underruns

fr 1 is DOWN


    Description: fr logical

    Signaling type is AUTO, signaling role is USER

    Multilink disabled

    Polling interval is 10 seconds,

    full inquiry interval is 6 polling intervals

  Last clearing of "show interface" counters: 00:49:07

  Link information:

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

    BW 0 Kbps

    Queueing method: weighted fair

    HDLC tx ring limit: 2

    Output queue: 0/0/684/64/0 (size/highest/max total/threshold/drops)

      Conversations  0/0/256 (active/max active/max total)

      Available Bandwidth 1152 kilobits/sec

      0 packets input, 0 bytes

      0 pkts discarded, 0 error pkts, 0 unknown protocol pkts

      0 packets output, 0 bytes

      0 tx pkts discarded, 0 tx error pkts

fr 1.500 is Inactive

  Description:  fr 1.500

  Ip address is, mask is

  IP MTU is 1500 bytes

  Interface-dlci is 500

  BW is 0 Kbps

  Average utilization is 0%

  Last clearing of "show interface" counters: never

eth 0/1 is UP, line protocol is UP

  Description: Local LAN

  Hardware address is 00:A0:C8:57:4B:FB

  Ip address is, netmask is

  Secondary IP:,

  IP MTU is 1500 bytes

  BW is 100000 Kbit

  100Mb/s, full-duplex

  ARP type: ARPA; ARP timeout is 20 minutes

  Last clearing of "show interface" counters: never

  5 minute input rate 1952 bits/sec, 1 packets/sec

  5 minute output rate 904 bits/sec, 1 packets/sec

    Queueing method: fifo

    Output queue: 0/256/0 (size/max total/drops)

    Interface Shaper: NOT ENABLED

    7498 packets input, 1601705 bytes

    6566 unicasts, 932 broadcasts, 0 multicasts input

    0 unknown protocol, 0 symbol errors, 0 discards

    0 input errors, 0 runts, 0 giants

    0 no buffer, 0 overruns, 0 internal receive errors

    0 alignment errors, 0 crc errors

    7692 packets output, 2892150 bytes

    7588 unicasts, 4 broadcasts, 100 multicasts output

    0 output errors, 0 deferred, 0 discards

    0 single, 0 multiple, 0 late collisions

    0 excessive collisions, 0 underruns

    0 internal transmit errors, 0 carrier sense errors

    0 resets, 0 throttles

What is this error indicating and how would I resolve the situation of "activating" fr 1.500?

2) Is a "loopback" interface required to be added manually or is this created once the device detects an active link?

I appreciate your help and input greatly

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4 Replies
New Contributor

Re: Netvanta 3200 | (Interface) Frame Relay, Sub-Relay & Loopback Questions

The AdTran Support Community is one of the worst excuses for a support community I have seen in a great many years!

Why does AdTran even invest the time to create and host such a useless source for it's users?

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Re: Netvanta 3200 | (Interface) Frame Relay, Sub-Relay & Loopback Questions


This sounds like the kind of issue that might be best worked through an ADTRAN Technical Support ticket.  If the unit is still within its 5 year warranty, feel free to open up a support case on our website.  Also, Pat Garner – ADTRAN’s Community Manager will be reaching out to you to get your input as to why the Support Community is falling short of your expectations.



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New Contributor

Re: Netvanta 3200 | (Interface) Frame Relay, Sub-Relay & Loopback Questions

WOW! Seriously? Only after I make a second post of truth regarding this sites efficacy to its users would a response finally manifest.

Thanks the same Charles, I did resolve this issue on my own within 24 hours my submitting this thread.

I find it very odd that a manufacturers "support community" suffers such poor adminstration for its users, never receiving response for months up until I submitted my response to my own thread.

This "support community" sports a great deal of other users threads which not unlike my own never garner so much as a response, I call that a disservice to Adtran users and furthermore, it will negatively influence Adtran's potential future upgrade sales likewise!

Users expect some form of a reasonably timely response from "someone". Otherwise why should ANY Adtran users waste their time using this community?

Thank you very much for having the fortitude to at least interact Charles.

Have a great day.

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Community Manager
Community Manager

Re: Netvanta 3200 | (Interface) Frame Relay, Sub-Relay & Loopback Questions


The support community is designed for ADTRAN customers to interact and is not a preplacement for our technical support. However, we will improve our responsiveness to posts that go unanswered for a period of time. We trust that future posts will result in a better experience for you as we work to enhance our Customer Community


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