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Cell Relay Retreat>MPLS-OPS Archive>month:2001-Apr> msg00115



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RE: [j-nsp] isis question

  • From: Chris Flores <chris.flores@onfiber.com>
  • Date: Wed, 25 Apr 2001 09:58:57 -0500
  • Resent-Date: Wed, 25 Apr 2001 13:03:38 -0400
  • To: "'zheng jiang gu'" <zjgu@ce-air.com>, mpls-ops@mplsrc.com, juniper-nsp@puck.nether.net, Aviva Garrett <aviva@juniper.net>

My response is in-line. I hope it helps...
-----Original Message-----
From: zheng jiang gu [mailto:zjgu@ce-air.com]
Sent: Tuesday, April 24, 2001 9:15 PM
To: mpls-ops@mplsrc.com; juniper-nsp@puck.nether.net; Aviva Garrett
Subject: [j-nsp] isis question

hi all:
   When I study isis, I meet the problem:
Which network layer use to encapsulation isis-pdu?
Is it clnp or ip? 
 
CF: The OSI packets (or PDUs) are forwarded "as is" or transmitted directly over the underlying link layer without the need for encapsulation - per RFC 1195.
 
How many IS-IS adjacency between point-to-point routers?
 
CF: IIH (IS-IS Hello) PDUs are utilized to initialize and maintain adjacencies between neighbors. On a p2p link, one neighbor creates one adjacency. Do you have a more specific question that needs answering?
 
br
shawn