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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

776.0. "ISDN event logger messages" by STKAI1::KACK (H�kan K�ck @GOO) Mon Mar 03 1997 07:42

Hi,

I run a ISDN/PPP T 2 display this morning which raised a couple of questions:

1) Is it possible to disable the PPP LCP echo send/receive mechanism? The isdn
link seems never to be taken down because the echos are continously sent.

2) I got a PPP079 message prt 0X'80FD'. Where can I look up what protocol is
80FD?

3) I got another PPP message saying "fsm-message" sent. What does fsm-message
mean. I couldn't find anything in the event manual.

4)Is it possible to get time-stamped event messages?

all help appreciated,

/h�kan
T.RTitleUserPersonal
Name		DateLines
776.1MARVIN::CLEVELANDMon Mar 03 1997 08:1223
    
>1) Is it possible to disable the PPP LCP echo send/receive mechanism? The isdn
>link seems never to be taken down because the echos are continously sent.
    
    It is not possible to disable them.  However, they definitely do not
    count against the idle timer for the link.  If your link is staying up
    unexpectedly, it is because of something else, not the LCP echos.
    
>2) I got a PPP079 message prt 0X'80FD'. Where can I look up what protocol is
>80FD?
    
    It should be listed in an RFC somewhere.  Some of the newer protocols
    might only be mentioned in a draft RFC.  0x80fd is the "Individual Link
    CCP".
    
>3) I got another PPP message saying "fsm-message" sent. What does fsm-message
>mean. I couldn't find anything in the event manual.
    
    which message?  The PPP events try to log the state of the protocol,
    and the action they are going to take.  They probably aren't very
    useful without knowing the code, or at least the PPP state diagrams
    from the RFC.
776.2Ooops forgot one...MARVIN::CLEVELANDMon Mar 03 1997 09:078
    
>4)Is it possible to get time-stamped event messages?

    You can use  'set time {uptime|time_of_day}' to timestamp
    ELS messages.  Time of day will only be valid if you have manually set
    the time or are set up for NTP.
    
    Tim
776.3Can you force an ISDN link down?STKAI1::KACKH�kan K�ck @GOOTue Mar 04 1997 02:2412
    Do I understand you correctly; as long as the IP-link is not disconnected 
    the PPP will keep on sending echos (and the ISDN link will stay up).
    
    We did a PING from the Routeabout and the link stayed up so I suspect
    something in the other end (a 3com router) keeps IP up then.
    
    Would it be possible to force an ISDN link down from the RA without
    restarting the router or removing the cable?
    
    thanks,
    /h�kan
776.4MARVIN::CLEVELANDTue Mar 04 1997 04:3718
    
>   Do I understand you correctly; as long as the IP-link is not disconnected 
>   the PPP will keep on sending echos (and the ISDN link will stay up).
    
    As long as the link is up, PPP will send LCP echo requests (a
    maintenance procedure to detect "silent" disconnects), but they do NOT
    keep the link up on their own.  There must be other traffic (receive or
    transmit) keeping the link up.  It can be very difficult to discover
    what is keeping it up in a multiprotocol arrangement.  You could use
    DTF to trace the PPP level traffic (I think) and see what protocol
    other than LCP is still sending/receiving packets.
    
>   Would it be possible to force an ISDN link down from the RA without
>   restarting the router or removing the cable?
    
    You can disable the dial circuit.
    
    Tim