How to test layer 2 connectivity on Cisco Switch?

  • I'm testing a new FTTH CPE in our lab. A Cisco ME3400 switch. So far I'm having issues in provisioning them. I have activated DHCP debugging to see the DHCP packets.

    I wonder how can I test to know if there is layer 2 connectivity between the CPE and ME3400?

    Some output :

    ME3400#sh int fa0/1 FastEthernet0/1 is up, line protocol is up (connected) Hardware is Fast Ethernet, address is 0023.05ab.c883 (bia 0023.05ab.c883)

    ME3400#sh mac address-table

    Vlan Mac Address Type Ports
    ---- ----------- -------- -----
    All 0100.0ccc.cccc STATIC CPU
    ...
    1 XXXX.XX29.c942 DYNAMIC Gi0/1
    1 XXXX.XXe4.0bdd DYNAMIC Gi0/1
    1 XXXX.XX70.113e DYNAMIC Gi0/1
    10 XXXX.XXa1.4ca0 DYNAMIC Fa0/1

  • ytti

    ytti Correct answer

    8 years ago

    If you see MAC address is 'mac address-table' you have L2 connectivity. So nothing wrong in your test methodology.

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Content dated before 7/24/2021 11:53 AM

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