draft-ietf-bmwg-mcastm-05.txt   draft-ietf-bmwg-mcastm-06.txt 
Network Working Group Hardev Soor Network Working Group Hardev Soor
INTERNET-DRAFT Debra Stopp INTERNET-DRAFT Debra Stopp
Expires in: March 2001 IXIA Expires in: April 2001 IXIA
Ralph Daniels Ralph Daniels
Netcom Systems Netcom Systems
December 2000 October 2000
Methodology for IP Multicast Benchmarking Methodology for IP Multicast Benchmarking
<draft-ietf-bmwg-mcastm-05.txt> <draft-ietf-bmwg-mcastm-06.txt>
Status of this Memo 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 Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet- other groups may also distribute working documents as Internet-
Drafts. Drafts.
skipping to change at page 9, line 40 skipping to change at page 9, line 40
Re-encapsulation takes place in DUT/SUT B after test port C has Re-encapsulation takes place in DUT/SUT B after test port C has
received the decapsulated frames. These decapsulated frames will received the decapsulated frames. These decapsulated frames will
be re-inserted with a new encapsulation frame and sent to test be re-inserted with a new encapsulation frame and sent to test
port B which will measure the throughput. See Figure 5. port B which will measure the throughput. See Figure 5.
Test port A DUT/SUT A Test port B DUT/SUT B Test port Test port A DUT/SUT A Test port B DUT/SUT B Test port
C C
---------- ---------- ---------- ----------
| | | | | | | |
-----(a) (b)| |(c) ---- (d)| |(e) (f)----- -----(a) (b)| |(c) ---- (d)| |(e) (f)----
||||| -----> | |----> |||| <---->| |<----> ||||| -
----- | | ---- | | ----- ||||| -----> | |----> |||| <---->| |<---->
|||||
----- | | ---- | | ----
-
| | | | | | | |
---------- ---------- ---------- ----------
Figure 5 Figure 5
-------- --------
Result Result
Parameters to be measured SHOULD include the frame loss and Parameters to be measured SHOULD include the frame loss and
percent loss per destination port for each multicast group percent loss per destination port for each multicast group
address. address.
skipping to change at line 727 skipping to change at page 16, line 4
Corporate Networks", John Wiley & Sons, Inc, 1998. Corporate Networks", John Wiley & Sons, Inc, 1998.
[Ma98] Mandeville, R., "Benchmarking Terminology for LAN Switching [Ma98] Mandeville, R., "Benchmarking Terminology for LAN Switching
Devices", RFC 2285, February 1998. Devices", RFC 2285, February 1998.
[Mt98] Maufer, T. "Deploying IP Multicast in the Enterprise." Prentice- [Mt98] Maufer, T. "Deploying IP Multicast in the Enterprise." Prentice-
Hall, 1998. Hall, 1998.
[Se98] Semeria, C. and Maufer, T. "Introduction to IP Multicast [Se98] Semeria, C. and Maufer, T. "Introduction to IP Multicast
Routing." http://www.3com.com/nsc/501303.html 3Com Corp., 1998. Routing." http://www.3com.com/nsc/501303.html 3Com Corp., 1998.
11
Author's Addresses
Hardev Soor
IXIA
26601 W. Agoura Rd.
Calabasas, CA 91302
USA
Phone: 818 871 1800
EMail: hardev@ixiacom.com
Debra Stopp
IXIA
26601 W. Agoura Rd.
Calabasas, CA 91302
USA
Phone: 818 871 1800
EMail: debby@ixiacom.com
Ralph Daniels
Netcom Systems
948 Loop Road
Clayton, NC 27520
USA
Phone: 919 550 9475
EMail: Ralph_Daniels@NetcomSystems.com
Appendix A: Determining an even distribution
It is important to understand and fully define the distribution of
frames among all multicast and unicast destinations. If the
distribution is not well defined or understood, the throughput and
forwarding metrics are not meaningful.
In a homogeneous environment, a large single burst of multicast
frames may be followed by a large burst of unicast frames. This is a
very different distribution than that of a non-homogeneous
environment, where the multicast and unicast frames are intermingled
throughout the entire transmission.
The recommended distribution is that of the non-homogeneous
environment because it more closely represents a real-world scenario.
The distribution is modeled by calculating the number of multicast
frames per destination port as a burst, then calculating the number
of unicast frames to transmit as a percentage of the total frames
transmitted. The overall effect of the distribution is small bursts
of multicast frames intermingled with small bursts of unicast frames.
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