Re: Somebody must know the answer

From: Brian Hescock (bhescock@xxxxxxxxx)
Date: Fri Sep 01 2000 - 15:54:00 GMT-3


   
   Damiem,
      I assume you're referring to not being able to ping your own serial
   interface but you can the ethernet interface? There's an "Open
   Forum" question/answer on this on CCO, basically, the ping on the
   serial interface is sent out over the interface, it doesn't answer it
   locally.
   
   Brian
   
   Roger Wang wrote:
   
     I sometimes wonder that myself, but I don't know the answer. What
     I do know is that it has to do with layer 2 encap types. For
     example, frame relay interfaces - if it's a point-to-point
     sub-interface, a "map" statement won't be necessary and can't
     (frame-relay interface-dlci) to ping the local interface;
     otherwise, you'll need a "map" statement to the local interface in
     order to ping it (packets go to the other end and back). The same
     goes to X25 encap, I think.HTH,Rog
     
   -----Original Message-----
   From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
   damien
   Sent: Friday, September 01, 2000 1:19 PM
   To: ccielab@groupstudy.com
   Subject: Somebody must know the answer
   
   
     3rd time to post....!!! Can anybody tell me exactly what happens in
     terms of the IP stack on the
     Router, when you ping an Ethernet local interface and a Serial ptp
     Interface.........i.e. the packet is generated by the Router to
     ping its
     own interface.........where exactly the packet goes........or
     software
     instructions that are carried out..........
   



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