what is controller T1 interface

Unanswered Question
Jul 7th, 2008
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Hi all,


i see this on router interface

Interface Status Protocol Description

Fa0/0 up up

Fa0/1 up up

Se2/0 up up

Se2/1 admin down down

Se3/0:0 up up

Lo0 up up



sh controller t1 3/0

T1 3/0 is up.

Applique type is Channelized T1

Cablelength is long gain36 0db

Description: Verizon T1 to Seligman Palo Alto

No alarms detected.

Framing is ESF, Line Code is B8ZS, Clock Source is Line.

Data in current interval (269 seconds elapsed):

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 1:

10 Line Code Violations, 58 Path Code Violations

0 Slip Secs, 3 Fr Loss Secs, 4 Line Err Secs, 0 Degraded Mins

7 Errored Secs, 4 Bursty Err Secs, 3 Severely Err Secs, 75 Unavail Secs

Data in Interval 2:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs


0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 9:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 10:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Total Data (last 10 15 minute intervals):

10 Line Code Violations, 58 Path Code Violations,

0 Slip Secs, 3 Fr Loss Secs, 4 Line Err Secs, 0 Degraded Mins,

7 Errored Secs, 4 Bursty Err Secs, 3 Severely Err Secs, 75 Unavail Secs



sh int Se3/0:0

Serial3/0:0 is up, line protocol is up

Hardware is PA-MC-8PRI


Internet address is 10.95.244.13/30

MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,

reliability 255/255, txload 4/255, rxload 1/255

Encapsulation HDLC, crc 16, loopback not set

Keepalive set (10 sec)

Last input 00:00:03, output 00:00:00, output hang never

Last clearing of "show interface" counters 4w1d

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 40181

Queueing strategy: weighted fair

Output queue: 0/1000/64/40163 (size/max total/threshold/drops)

Conversations 0/16/16 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

5 minute input rate 5000 bits/sec, 6 packets/sec

5 minute output rate 27000 bits/sec, 6 packets/sec

49979303 packets input, 519290582 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 1 giants, 0 throttles

48593 input errors, 2711 CRC, 0 frame, 0 overrun, 0 ignored, 24252 abort

52430870 packets output, 4152546207 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

14 carrier transitions no alarm present

Timeslot(s) Used:1-24, subrate: 64Kb/s, transmit delay is 0 flags


can anyone explain we what is difference in serial3/0:0 interface and controller T1 3/0 interface?????????

or are they same interface???

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jgross Mon, 07/07/2008 - 03:10
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Hi,

the controller is the physical interface. A T1 has 24 channels.

The interface se3/0:0 is the first B-Channel out of 24.

Bye

Jo


mahesh18 Mon, 07/07/2008 - 19:42
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Hi jgross,


Thanks for reply.

so if we have se0 interface which is this

B-channel?

jgross Tue, 07/08/2008 - 00:15
User Badges:

Hello,

the controller defines the physical parameters, like framing and lincode, and D-channel Protocol, ... .

After you have specified the contoller you will find a corresponding serial interface in the configuration.

This is the D-Channel of the Interface used to exchange control information.

In Europe we have E1 Controllers, with 30 B-Channels to transfer data at 64kBit/s, and one D-Channel to exchange control information.

So there is not only one B-Channel.

E1 Interfaces have 30-B Channels, T1 have 24 B-Channels.

The D-Channel in Europe is in the middle, so it is numbered interface serial2/0:15.

The B-Channels are numbered starting from 0.

So the status of B-Channel 0 can be displayed with

show interface serial 2/0:0

B-Channel No 1 can be displayed with

show interface serial 2/0:1,

up to

show interface serial 2/0:23, for T1,

or

show interface serial 2/0:30, for E1

... .


Bye

Jo


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