Avaya Troubleshooting Routers Guide de dépannage télécharger pdf (Page 81)

Troubleshooting a Data Link Connection Problem

5-3

The attributes include the number of cells received and transmitted, and the

number of frames dropped.

5. Display these attributes again after 1 minute and compare the values to

determine which errors are currently occurring.

The wfAtmVclRcvCrcErrs attribute shows the number of errors due to line

noise, which may be caused by defective ﬁber.

The wfAtmVclRcvMaxLenExceedErrs attribute shows the number of packets

coming from the ATM code and handed to the driver for transmission that

exceeded the maximum MTU (maximum transfer unit) conﬁgured on the

VCL. Check the conﬁguration of the MTU and consider increasing the

maximum MTU.

The wfAtmVclRcvInvalidLenErrs attribute shows the number of SAR

(segmentation and reassembly) frames containing an error in length after

PDU (protocol data unit) re-assembly. It can indicate that the router is

dropping frames. Check the dropped frame statistics. Check the path of the

cells through the network to determine the location of the dropped cells.

6. Use the Technician Interface to display the attributes associated with the

wfAtmAlcCopDataPath object.

The Quick Get path to this group is wfLine➔wfAtmInterfaceGroup➔

wfAtmLinkModule➔wfAtmAlcCopDataPathTable.

These attributes contain information on the ATM co-processor buffer

utilization, the number of cells received and transmitted, and the number of

dropped (clipped) frames.

The count of each cell type received and transmitted is always 0; the other

counts are for future use.

7. Display these attributes again after 1 minute and compare the values to

determine which errors are currently occurring.

8. Use the Technician Interface to display the attributes associated with the

wfAtmAlcCopDataPath object.

The Quick Get path to this group is wfLine➔wfAtmInterfaceGroup➔

wfAtmLinkModule➔wfAtmAlcCopDataPathTable.

These attributes contain the statistics showing how much data the link module

is transmitting.

9. Display these attributes again after 1 minute and compare the values to

determine how much data the link module is currently transmitting.

1 2 ... 76 77 78 79 80 81 82 83 84 85 86 ... 253 254

Pas de commentaire

Avaya Troubleshooting Routers Guide de dépannage Page 81