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2811 E1 conections problems

Hello! (excuse for my english :-) )

I have a problem with a e1 connection

Router A :

Router cisco 2811 with a VWIC-2MFT-G703

Configuration:

controller E1 0/0/0

channel-group 0 unframed

interface Serial0/0/0:0

ip address 172.24.234.27 255.255.255.248

encapsulation ppp

show int serial 0/0/0:0

Serial0/0/0:0 is up, line protocol is down

Hardware is GT96K Serial

Internet address is 172.24.234.27/29

MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec,

reliability 205/255, txload 1/255, rxload 1/255

Encapsulation PPP, LCP REQsent, loopback not set

Keepalive set (10 sec)

Last input never, output 00:00:01, output hang never

Last clearing of "show interface" counters 00:06:43

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

Queueing strategy: weighted fair

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

Conversations 0/1/256 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

Available Bandwidth 1536 kilobits/sec

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

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

0 packets input, 0 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 37 giants, 0 throttles

85 input errors, 85 CRC, 14 frame, 10 overrun, 0 ignored, 43 abort

75 packets output, 1050 bytes, 0 underruns

0 output errors, 0 collisions, 7 interface resets

0 output buffer failures, 0 output buffers swapped out

3 carrier transitions

Timeslot(s) Used: UNFRAMED, SCC: 0, Transmitter delay is 0 flags

Router B :

Router cisco 2620 with a WIC 2T

interface Serial0/0

description "Puerto WAN ARUCAS"

bandwidth 2048

ip address 172.24.234.26 255.255.255.248

no ip proxy-arp

encapsulation ppp

Show int serial 0/0:

Serial0/0 is up, line protocol is down

Hardware is PowerQUICC Serial

Description: "Puerto WAN ARUCAS"

Internet address is 172.24.234.26/29

MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec,

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

Encapsulation PPP, LCP Listen, loopback not set

Keepalive set (10 sec)

Last input never, output 00:00:04, output hang never

Last clearing of "show interface" counters 00:30:41

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

Queueing strategy: weighted fair

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

Conversations 0/1/256 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

Available Bandwidth 1536 kilobits/sec

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

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

0 packets input, 0 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 19 giants, 0 throttles

21 input errors, 0 CRC, 1 frame, 0 overrun, 0 ignored, 20 abort

100 packets output, 1400 bytes, 0 underruns

0 output errors, 0 collisions, 25 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions

DCD=up DSR=up DTR=up RTS=up CTS=up

Really i don?t know the reason for the protocol down,

I make test with diferent clock line configuration, but, always the same result "protocol down"

Help!!! ideas!!!

thank!!!

David Vicente Martinez

1 ACCEPTED SOLUTION

Accepted Solutions
New Member

Re: 2811 E1 conections problems

Is the line bouncing or has it been down for a steady period of time? I see that the reliability is low on router {reliability 205/255}. Let me know and I should be able to provide an answer. Have a great day!!!

4 REPLIES
New Member

Re: 2811 E1 conections problems

Is the line bouncing or has it been down for a steady period of time? I see that the reliability is low on router {reliability 205/255}. Let me know and I should be able to provide an answer. Have a great day!!!

Re: 2811 E1 conections problems

the serial interface all the time is up.

Re: 2811 E1 conections problems

Hi David

The serial interface on Router A is showing down and because of which the reliability is also poor which is well pointed out by other poster.

You need to check the physical link and make sure its error free...

regds

Re: 2811 E1 conections problems

Hi!

Router A

Controler E1 0/0/0

line-termination 120-ohm

(the reliability up to 255)

Router B

Serial 0/0

invert txclock

Yes! works!!!

Thank you / Gracias a todos.

Regds

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