Re: (PM) LCP echo requests

Josh Richards (jrichard@livingston.com)
Sun, 8 Feb 1998 00:32:00 -0800 (PST)

On Sat, 7 Feb 1998, Brian Elfert wrote:
> On Fri, 6 Feb 1998, James Sneeringer wrote:
>
> > On Fri, 6 Feb 1998, G. Turner wrote:
> > |
> > | You're probably seeing PPP keepalives.
> >
> > Received LCP_ECHO_REQUEST on port S12 of 4 bytes containing:
> > 09 dd 00 08 00 00 00 00
> > Sending LCP_ECHO_REPLY to port S12 of 8 bytes containing:
> > 0a dd 00 08 fd 9a 61 5b
>
> This is exactly what I see.

PPP uses Echo-Requests/Replys to determine link quality (among some other
things). This is normal to see.

>
> > One user's router (albeit, a dedicated 24/7 customer) sends these every
> > second. Down both B channels. It's quite annoying when you're trying to
> > see _real_ debugging output. How about a way to filter them, or at least
> > prevent them from showing up in 0x51?

The thing is that they *are* real PPP "debugging output". It would be
sort of arbitrary to leave them out since they are just as much part of
the PPP session as anything else. So no, there is not really a way to
leave just them out of the output (that I'm aware of).

I would personally like to see a way to do a "set debug 0x51 sX" or
whatever (on a per port basis). This would probably help you out some.

>
> Most of mine are are from ISDN customers, but I also see this occasionally
> from modem customers running Windows 95.
>
> Does anyone have any idea how to shut these off. They do really screw up
> things when trying to do PPP debugging.
>
> Brian

----
Josh Richards - <jrichard@livingston.com> - [Beta Engineer]
LUCENT Technologies - Remote Access Business Unit
(formerly Livingston Enterprises, Inc.)
http://www.livingston.com/

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