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Conference irocz::common_brouters

Title:Digital Brouters Conference
Notice:New common-code brouter family: RouteAbout, DECswitch 900
Moderator:MARVIN::HARTLL
Created:Mon Jul 17 1995
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:929
Total number of notes:3736

914.0. "Disabling loopback packets on VNswitch?" by CSC32::bngpc.cxo.dec.com::goodwin (Brad Goodwn - NSIS) Thu May 22 1997 19:05

Is there any way to disable the loopback packets generated by the
VNswitch? My customer is using a Smartbits tester on the VNswitch
and the loopback packets seem to be screwing up the tests. They
are running the X-stream and the Address Acquistion tests. The 
loopback packets are giving them bogus results.

Also, we enabled rate limiting on the VNswitch and it appeared
to not work during the broadcast test. We enabled it for the 
default @400pps and they were still seeing full line rates,
14400, with the broadcast test.

Thanks,
Brad
T.RTitleUserPersonal
Name		DateLines
914.1backdoorNETCAD::PAGLIARORich Pagliaro, Networks BU, HPNFri May 23 1997 08:2933
    Yes there is a way of temporarily disabling the generation of test
    packets generated by VNswitch Ethernet ports. I say "temporarily"
    because the configuration change is not saved in NVRAM and will be lost
    once the module is restarted.
    
    Here is how to disable the test packets.

    1. From the Config> submenu (talk 6), type dvt.

    2. At the PE2k_DVT> prompt, type "ed patch.testpacket". 
       You will get a screen that looks like the following:

    	testpacket			0x01 

    3. To disable test packet generation, type 0x00 and then hit <RETURN>.
       To reenable test packet generation, type 0x01 (or any number greater
       than 0) and hit <RETURN>

    4. To exit this screen, simply type "q".

    5. To exit the DVT submenu, type "exit".


    If you reset/restart the module you will have to re-enter these
    commands to disable test packet generation.

    As always, be very careful when doing anything in the DVT submenu. It
    is not intended for customer use and you could seriously impact the
    behavior/performance of the module if you do the wrong thing.
914.2answersFORBIN::WILKINSONFri May 23 1997 11:0313
    re: .0
    
    When rate limiting was enabled, was it enabled for the box and
    separately for the broadcast address?  Was it enable from the CLI
    or MCM?  If from the CLI, from the monitor or config process?
    
    re: .1
    
    Remind the customer that DVT commands are unsupported, undocumented
    and may change without notice with future versions of the software.
    
    Hugh
914.3CSC32::bngpc.cxo.dec.com::goodwinBrad Goodwn - NSISFri May 23 1997 11:1212
Rich,

Thanks for the info.

Hugh,

I enabled it using MCM in the "Switch Configuration" screen. It was the only
option I changed. Also, I doubt the customer will ever use debug mode again 
after they finish doing tests of the switch.

Thanks,
Brad