L2 transparency – Ethertypes

../../_images/trsp-ethertypes.png

This task verifies Layer 2 transparency for various Ethertypes and LLC/SNAP protocols, i.e. checks that the Ethertypes and protocols are passed through the network.

Test procedure

Five frames are sent in both directions on each protocol. Each frame is an Ethernet frame with correctly set MAC addresses and dummy payload.

Fail criteria

The test fails if any of the protocols listed below is not received according to the configured expected outcome. By default all protocols are expected to pass.

Limitations

This test can only run on physical or VLAN interfaces (not bridges).

Regarding use of the Test Agent management interface for this test, see here.

Parameters

General

  • Sender: The sender Test Agent interface.

  • Receiver: The receiver Test Agent interface.

  • Wait for ready: Time to wait before starting this test step. The purpose of inserting a wait is to allow all Test Agents time to come online and acquire good time sync. Min: 1 min. Max: 24 hours. Default: “Don’t wait”, i.e. zero wait time.

Advanced

  • Expected outcome for <Ethertype/protocol>: For each item, select Pass, Drop, or Don’t test. Default: Pass.

Result metrics

  • Pass/fail for selected Ethertypes and LLC/SNAP protocols

Reference section

Ethertypes

Protocol

Ethertype

3COM Loop Detect

0×9003

3COM TCP-IP Sys

0×9002

3COM XNS Sys Mgmt

0×9001

AppleTalk

0×809b

AppleTalk ARP

0×80f3

CESoE

0×88d8

DEC LANBridge

0×8038

Frame Relay ARP

0×0808

GSMP

0×880c

IBM SNA Service

0×80d5

MPLS

0×8847

Novell 8137

0×8137

Novell 8138

0×8138

PPP

0×880b

PPPoE Discovery Stage

0×8863

PPPoE Session Stage

0×8864

Raw Frame Relay

0×6559

SNMP

0×814c

LLC/SNAP protocols

Protocol

Destination MAC

SAP

CTRL

OUI

PID

CDP

01:00:0c:cc:cc:cc

0×aa

0×03

0×0000c

0×2000

Cisco VTP

01:00:0c:cc:cc:cc

0×aa

0×03

0×0000c

0×2003

Cisco DTP

01:00:0c:cc:cc:cc

0×aa

0×03

0×0000c

0×2004

CGMP

01:00:0c:dd:dd:dd

0×aa

0×03

0×0000c

0×2001