Re: ATM interface troubleshooting question. [7:2249]

[[EMAIL PROTECTED] (Katson Yeung)]

It is not really related to the vpi and vci number.... It is a PVC on
an AIP card subinterface. The remote end is a ..... Juniper...

I followed the trouble shooting guide for ATM interface and discovered
it should be related to traffic policying thing... typically
associated with MBS value.

At the Juniper, the MBS (max burst size) value is range from 1 - 255,
and on the manual there is no way to know (or maybe I don't know how)
the MBS so that it is conformed with the telco traffic policying
requirement..... On the Juniper, I just set it as 255 (max value)....

At the cisco side, I can accurately calculate the MBS value for the
PVC and I observed no crc or frame error.....

A service call to telco is made and they said the ATM circuit is
okay.... So I predicted that it may be the policying thing at Juniper
that make the corrupted thing. Well, can't blame it, it may be due to
a wrong parameter.

Well, I will keep all of you update on this issue... 


On 30 Apr 2001 18:46:59 -0400, [EMAIL PROTECTED] ("Liang Mark
J Civ AFRL/PROI") wrote:

>What is the vpi and vci number for the that vc? 0,5 or 0,16 ?If would be
>helpful if you could post the config file. 
>
>Mark,
>
>
>-----Original Message-----
>From: [EMAIL PROTECTED] (Katson Yeung) [mailto:[EMAIL PROTECTED]]
>Sent: Friday, April 27, 2001 6:54 AM
>To: [EMAIL PROTECTED]
>Subject: ATM interface troubleshooting question. [7:2249]
>
>
>Dear all,
>
>My old 7507 is having a minor problem.... it is 12.0.16GD, RSP2 with
>64M ram and the ATM card is an AIP. I have only one VC associate with
>this ATM port.
>
>I found quite a number of input errors (CRC and Frames)... how can I
>know the source of that problem?? Is it the cell level, or the frame
>level problem?
>
>
>See below show interface output:
>
>
>ATM0/0 is up, line protocol is up 
>  Hardware is cxBus ATM
>  MTU 4470 bytes, sub MTU 4470, BW 155520 Kbit, DLY 80 usec, rely
>255/255, load 8/255
>  Encapsulation ATM, loopback not set, keepalive not supported 
>  Encapsulation(s): AAL5, PVC mode
>  256 TX buffers, 256 RX buffers,
>  2048 maximum active VCs, 1024 VCs per VP, 1 current VCCs
>  VC idle disconnect time: 300 seconds
>  Last input 00:00:00, output 00:00:00, output hang never
>  Last clearing of "show interface" counters 3d10h
>  Queueing strategy: fifo
>  Output queue 0/40, 0 drops; input queue 1/75, 40 drops
>  5 minute input rate 34782000 bits/sec, 4564 packets/sec
>  5 minute output rate 5307000 bits/sec, 3372 packets/sec
>     1174284787 packets input, 1013959162 bytes, 0 no buffer
>     Received 0 broadcasts, 0 runts, 0 giants, 11 throttles
>     13076769 input errors, 13054514 CRC, 22255 frame, 0 overrun, 0
>ignored, 0 abort
>     893230791 packets output, 346650156 bytes, 0 underruns
>     0 output errors, 0 collisions, 0 interface resets
>     0 output buffer failures, 0 output buffers swapped out
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