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  • 1.  Loop testing a GE interface w/ ping

    Posted 11-06-2007 13:19
    I was working on a GE interface and needed to do some loop testing. I can't use BERT because it is GE, so my next option is to send pings over the loop.

    Traffic to the local IP address is not send out the interface by default, so my search for the correct format led me to here:

    The syntax for the command is "ping interface at-fpc/pic/port-IP-address bypass-routing count 1000 rapid"

    I mirrored this with my 10G interface "ping interface ge-1/0/0.0 bypass-routing count 1000 rapid"

    The command seemed to complete, but my response times were in the 0.02 ms range when I was expecting something closer to 5 or 6 ms indicating that the traffic was not being transmitted out the physical interface. (the response times were the same as a standard ping to a local address)

    Does this functionality not exist for GE?

    This was using JUNOS 7.x on a T series router.

    //Example config

    C3P0@TSeries> show configuration interfaces ge-1/0/0 | display set
    set interfaces ge-1/0/0 description "Test Interface"
    set interfaces ge-1/0/0 unit 0 family inet address

  • 2.  RE: Loop testing a GE interface w/ ping
    Best Answer

    Posted 11-07-2007 01:43
    Hi C3P0
    If you look at the section "Network Operations Guides" on the Juniper web site, there is a detailed guide on how to do loopback testing on the GE (or FE) interfaces. For a directly link to the GE guide go to:

    While you there, you might want to check out the rest of the Network Operations Guides.

    Hope this helps

    Message Edited by AntonD on 11-07-2007 01:44 AM

    Message Edited by AntonD on 11-07-2007 01:44 AM