Avaya Troubleshooting Routers Guide de dépannage télécharger pdf (Page 236)

Troubleshooting Routers

B-48

Instructions: Enter any hexadecimal number or character string up to 16 characters.

Parameters: Group

Packet Capture supports two Group parameters: one for incoming packets

and the other for outgoing packets. The MIB information is as follows:

Default: 1 (OR)

Options: 1 (OR) | 2 (AND)

Function: Determines whether Packet Capture copies a packet if it matches either

ﬁlter or both ﬁlters. Packet Capture uses this parameter only if you

conﬁgure both capture ﬁlters associated with a single direction.

Instructions: Use one of the following settings for each packet direction:

• 1 if you want Packet Capture to copy a packet if it matches either

Filter 1 or Filter 2.

• 2 if you want Packet Capture to copy a packet only if it matches both

Filter 1 and Filter 2.

Media-Speciﬁc Instructions and Examples

The following sections provide instructions and show examples of packets with

different media types. They assume you set the number of bytes to copy from each

packet to 64 by setting the wfPktCapturePktSize (wfPktCaptureEntry.9) to 2.

Each example uses the

pktdump command to show a hexadecimal decoding of a

frame or packet.

CSMA/CD

The CSMA/CD (Ethernet) physical media has a data link ﬁlter offset of 14 bytes

from the beginning of the MAC header. This places the data link ﬁlter point at the

next byte after the TYPE/LENGTH ﬁeld. Outgoing packets may contain less than

60 bytes each because they go to Packet Capture without padding.

Packet

Direction

Attribute Name

Attribute

No.

MIB Object ID

Incoming

wfPktCaptureRxFltr2Group

1.3.6.1.4.1.18.3.4.21.1.1.29

Outgoing

wfPktCaptureTxFltr2Group 35 1.3.6.1.4.1.18.3.4.21.1.1.35

1 2 ... 231 232 233 234 235 236 237 238 239 240 241 ... 253 254

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Avaya Troubleshooting Routers Guide de dépannage Page 236