draft-ietf-bmwg-ospfconv-term-06.txt   draft-ietf-bmwg-ospfconv-term-07.txt 
Network Working Group Vishwas Manral Network Working Group Vishwas Manral
Internet Draft Netplane Systems Internet Draft Netplane Systems
Russ White Russ White
Cisco Systems Cisco Systems
Aman Shaikh Aman Shaikh
Expiration Date: March 2004 University of California Expiration Date: July 2004 University of California
File Name: draft-bmwg-ospfconv-term-07.txt January 2004
OSPF Benchmarking Terminology and Concepts OSPF Benchmarking Terminology and Concepts
draft-ietf-bmwg-ospfconv-term-06.txt draft-ietf-bmwg-ospfconv-term-07.txt
1. Status of this Memo 1. Status of this Memo
This document is an Internet-Draft and is in full conformance with This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026. all provisions of Section 10 of RFC2026.
Internet Drafts are working documents of the Internet Engineering Internet Drafts are working documents of the Internet Engineering
Task Force (IETF), its Areas, and its Working Groups. Note that other Task Force (IETF), its Areas, and its Working Groups. Note that other
groups may also distribute working documents as Internet Drafts. groups may also distribute working documents as Internet Drafts.
skipping to change at page 1, line 35 skipping to change at page 1, line 37
draft" or "work in progress". draft" or "work in progress".
The list of current Internet-Drafts can be accessed at The list of current Internet-Drafts can be accessed at
http//www.ietf.org/ietf/1id-abstracts.txt http//www.ietf.org/ietf/1id-abstracts.txt
The list of Internet-Draft Shadow Directories can be accessed at The list of Internet-Draft Shadow Directories can be accessed at
http//www.ietf.org/shadow.html. http//www.ietf.org/shadow.html.
2. Abstract 2. Abstract
This draft explains the terminology and concepts used in [BENCHMARK] This draft explains the terminology and concepts used in OSPF
and future OSPF benchmarking drafts, within the context of those benchmarking. While some of these terms may be defined elsewhere, and
drafts. While some of these terms may be defined elsewhere, and we we will refer the reader to those definitions in some cases, we also
will refer the reader to those definitions in some cases, we also
include discussions concerning these terms as they relate include discussions concerning these terms as they relate
specifically to the tasks involved in benchmarking the OSPF protocol. specifically to the tasks involved in benchmarking the OSPF protocol.
3. Motivation 3. Motivation
This draft is a companion to [BENCHMARK], which describes basic Open This draft is a companion to [BENCHMARK], which describes basic Open
Shortest Path First [OSPF] testing methods. This draft explains Shortest Path First [OSPF] testing methods. This draft explains
terminology and concepts used in OSPF Testing Framework Drafts, such terminology and concepts used in OSPF Testing Framework Drafts, such
as [BENCHMARK]. as [BENCHMARK].
skipping to change at page 4, line 22 skipping to change at page 4, line 22
See [OSPF], Section 1.2. See [OSPF], Section 1.2.
- Discussion - Discussion
The adjacency formation time on a broadcast link can be The adjacency formation time on a broadcast link can be
more than that on a point-to-point link of the same speed, more than that on a point-to-point link of the same speed,
because DR election has to take place. All routers on a because DR election has to take place. All routers on a
broadcast network form adjacency with the DR and BDR. broadcast network form adjacency with the DR and BDR.
Async flooding also takes place thru the DR. In context of Async flooding also takes place thru the DR. In context of
convergence, it may take more time for an LSU to be convergence, it may take more time for an LSA to be
flooded from one DR-other router to another DR-other flooded from one DR-other router to another DR-other
router, because the LSA has to be first processed at the router, because the LSA has to be first processed at the
DR. DR.
o Shortest Path First Execution Time o Shortest Path First Execution Time
- Definition - Definition
The time taken by a router to complete the SPF process, as The time taken by a router to complete the SPF process, as
described in [OSPF]. described in [OSPF].
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- Discussion - Discussion
The hello interval should be the same for all routers on a The hello interval should be the same for all routers on a
network. network.
Decreasing the hello interval can allow the router dead Decreasing the hello interval can allow the router dead
interval (below) to be reduced, thus reducing convergence interval (below) to be reduced, thus reducing convergence
times in those situations where the router dead interval times in those situations where the router dead interval
timing out causes an OSPF process to notice an adjacency timing out causes an OSPF process to notice an adjacency
failure. Further discussion on small hello intervals is failure. Further discussion on small hello intervals is
given in [CONGESTION] and [MARKING]. given in [OSPF-SCALING].
o Router Dead interval o Router Dead interval
- Definition - Definition
See [OSPF], Section 7.1. See [OSPF], Section 7.1.
- Discussion - Discussion
This is advertised in the router's Hello Packets in the This is advertised in the router's Hello Packets in the
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8. Normative References 8. Normative References
[BENCHMARK] [BENCHMARK]
Manral, V., "Benchmarking Basic OSPF Single Router Control Plane Manral, V., "Benchmarking Basic OSPF Single Router Control Plane
Convergence", draft-bmwg-ospfconv-intraarea-05, March 2003 Convergence", draft-bmwg-ospfconv-intraarea-05, March 2003
[OSPF]Moy, J., "OSPF Version 2", RFC 2328, April 1998. [OSPF]Moy, J., "OSPF Version 2", RFC 2328, April 1998.
9. Informative References 9. Informative References
[CONGESTION] [OSPF-SCALING]
Ash, J., "Proposed Mechanisms for Congestion Control/Failure Choudhury, Gagan L., Editor, "Prioritized Treatment of Specific
Recovery in OSPF & ISIS Networks", October, 2001 OSPF Packets and Congestion Avoidance", draft-ietf-ospf-
scalability-06.txt, August 2003.
[MARKING]
Choudhury, G., et al, "Explicit Marking and Prioritized Treatment
of Specific IGP Packets for Faster IGP Convergence and Improved
Network Scalability and Stability", draft-ietf-ospf-scalability,
April 2002
10. Authors' Addresses 10. Authors' Addresses
Vishwas Manral, Vishwas Manral,
Netplane Systems, Netplane Systems,
189 Prashasan Nagar, 189 Prashasan Nagar,
Road number 72, Road number 72,
Jubilee Hills, Jubilee Hills,
Hyderabad. Hyderabad.
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