L2 transparency – Ethertypes

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

Test procedure

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

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).

 

Ethertypes

Protocol

Ethertype

Protocol

Ethertype

Frame Relay ARP

0×0808

PPP

0×880b

Raw Frame Relay

0×6559

PPPoE Session Stage

0×8864

DEC LANBridge

0×8038

PPPoE Discovery Stage

0×8863

AppleTalk

0×809b

3COM XNS Sys Mgmt

0×9001

IBM SNA Service

0×80d5

3COM TCP-IP Sys

0×9002

AppleTalk ARP

0×80f3

3COM loop detect

0×9003

Novell 8137

0×8137

SNMP

0×814c

Novell 8138

0×8138

GSMP

0×880c

MPLS

0×8847

CESoE

0×88d8

 

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

 

Parameters

General

  • Sender: The sender interface.
  • Receiver: The receiver interface.
  • Wait for ready: Time to wait before starting the test. 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. The Default is Pass.

Result metrics

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