Hi Chris
I had this question for a long...
* If IS-IS is not using any L3 (CLNP/IP) then
those IS-IS routing packets can't be forwarded beyond
1 hope. For example, OSPF packets can be forwarded
or flooded more than 1 hope in Virtual neighbor
environment. Am I correct or missing something?
* If IS-IS packets are forwarded directly over L2
then how does it cope up with fragmentation and
reassembly services. I am not able to visualize
how IS-IS packets will be transmitted over different
L2 technologies like ATM and broadcast/multicast capable
networks etc. How they get code-points?
Thanks & Regards --
http://www.geocities.com/kvsnaidu <http://www.geocities.com/kvsnaidu>
-----Original Message-----
From: Chris Flores [mailto:chris.flores@onfiber.com]
Sent: Wednesday, April 25, 2001 10:59 AM
To: 'zheng jiang gu'; mpls-ops@mplsrc.com; juniper-nsp@puck.nether.net;
Aviva Garrett
Subject: RE: [j-nsp] isis question
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:
1 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.
2 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<?xml:namespace prefix = o ns =
"urn:schemas-microsoft-com:office:office" />
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