Avaya Troubleshooting Routers Guía para resolver problemas descargar pdf (Pagina 92)

Troubleshooting Routers

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308656-14.00 Rev 00

If underflow errors or corrupted frames occur, enable the attribute

wfCSMACDAlignmentMode, which determines whether the software

aligns the frame on a word boundary before giving it to the QENET.

• wfCSMACDLateCollnRx

This shows the number of late collisions received. A late collision

reception is a collision that takes place after the router receives the first 64

bytes of a frame. The length of the Ethernet cable exceeds the specified

length. Use a cable length that complies with the IEEE 802.3

specification.

Troubleshooting a FDDI Connection

This section assumes that you have isolated a problem to a FDDI connection. If

not, refer to Chapter 2 to determine whether these instructions apply to your

problem.

Troubleshoot a FDDI connection as follows:

Filter the log to display only messages from the FDDI entity running on

the slots experiencing the problem.

The Technician Interface command is as follows:

log -fftwid -eFDDI -s

<slot_no.>

Example

If you are filtering events from slots 3 and 4, enter the following command:

log -fftwid -eFDDI -s3 -s4

Use the Technician Interface to look at the values of the following

attributes in the wfFddiEntry object. The

get

command is next to the

attribute name. Or, use the wfLine

wfFddiTable Quick Get path to

access them.

• wfFDDIOverrunRx (

get wfFddiEntry.16.*

)

This shows the number of frames received with internal overrun errors.

The FDDI System Interface (FSI) chip set became overloaded and

dropped packets.

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Avaya Troubleshooting Routers Guía para resolver problemas Pagina 92