IPv6 Multicast Over TEIN Pujan Srivastava | pujan@ait.asia Asian - - PowerPoint PPT Presentation

02/10/10 IPv6 Multicast over TEIN 1

Report:

IPv6 Multicast Over TEIN

Pujan Srivastava | pujan@ait.asia Asian Institute of Technology

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Event: The 20th Asian School on Computer Science 2009 (TEIN) IPv6 Multicast Video Transmission

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CanalAVIST (www.canalavist.org)

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Objectives

Meeting on - IPv6 Multicast over TEIN (9th Feb. 2010, 14.00~15.00) NOC engineers of members of TEIN3 NR ENs to meet and discuss-

• To provide IPv6 multicast services on TEIN3
• To establish a common place for session announcements by

individual members, discussion group.

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Attendance

➔ AAR

Net – Australia

➔ CE

R NET – China

➔ ThaiR

E N – Thailand

➔ APAN-JP – Japan ➔ LEAR

N – Sri Lanka

➔ ER

NET – India

➔ ITB – Indonesia ➔ MyR

E N – Malaysia

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Background of IPv6 Multicast on TEIN3

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R eplication @ Router

Unicast: Unicast routing is concerned with

where the packet is going to.

Multicast: Multicast routing is concerned with

where the packet will be coming from.

IPv6 Multicast at a Glance

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R eplication @ Router

R eplication @ R

• uter ≃ R

esponsibility of R

• uter (R
• uter ↔ R
• uter)
• Multicast support at router (check IOS

version).

• Conf

i guration at router is required. R eceivers' capability of receiving Multicast (R

• uter ↔ Hos

t)

• Check if receiver supports MLD

Multic a s t Notes ♬ Bandwidth saving over links. ♬ E nhanced ef i ciency, reduces server loads. ☀ Multicast is UDP!! (Don't expect reliable delivery, jitter may occur)

IPv6 Multicast at a Glance

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Switch R1 DR Receiver Sender MLDv1/2 MLDv1/2 PIM UDP/RTP Multicast Traf f i c

Role of Protocols

AS1 R2 AS2 Embedded RP(IPv6-ASM) mBGP Embeeded R P is required for source discovery only in AS M (*,G). In case of S SM we do not need source discovery because we already have source address (S ,G)

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IPv6 Multicast at a Glance

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CanalAVIST (Application)

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RP Selection

• Current problem
• Present RPs

– BJ RP – HK

RP

– SG RP

• Best RP selection

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Tools IPv6 Multicast

• ssm

pingd, asm ping/ssm ping

• m

cfrst

• sm

join6 (VLC, DVTS, DVMCast etc)

• Multicast Beacon m

atrix

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AS MPING & S S MPING D

• asmping and ssmpingd are network level multicast

management tools that can be used to check whether one can receive multicast packets via AS M from a host.

• The host target given to asmping must run the ssmpingd

daemon, which listens on UDP port 4321 for IPv4 and IPv6 unicast requests.

• When it receives a request, it responds to the specif

i ed multicast group which asmping just have joined.

venaas.no/multicast/ssmping

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SSMPINGD (Ipv6)

Should run on sender

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ASMPING (IPv6)

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SSMPING (IPv6)

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MCFIRST

• Mcf

i rst is a tool to check whether you can receive (a given) multicast transmission.

• It supports AS

M/SS M, IPv4/IPv6. You run it specifying multicast group (and source if SS M) and port number.

• Optionally you may specify how many packets and/or for how many

seconds it shall run.

• Mcf

i rst -h for more options.

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MCFIRST

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MCFIRST

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MCFIRST

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DVPING / DVMC AS T

• tools for testing the network

performa nc e for the DV T S

• r other UDP based

high performance applications.

• can test the end-to-end packet loss, rtt and throughput of the network

without real DVTS applications, which can save a lot of debugging time both for the end users as well as network administrators.

• dvmcast/dvping can support IPv4 and IPv6, unicast and multicast, ASM and

S SM.

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File T rans mis s ion: DVMC AS T

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SMCLOCK/SMJOIN

tools for multicast sending and receiving texts (AS M/S SM). smclock/smclock6 send text strings containing date-and- time generated by system clock every seconds to a specif i c multicast group or channel. smjoin/smjoin6 can join the corresponding group (*, G) or channel (S, G) to receive the text strings and report the related information. (Note that smjoin/smjoin6 can join multicast group or channel generated by any multicast application.)

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S MC LOC K /S MJ OIN

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S MC LOC K /S MJ OIN - AS M

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S MC LOC K /S MJ OIN - S S M

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VLC + S MJ OIN (AS M)

vlc file:///Users/pujan/videos/sydney2.mov

• -sout='#duplicate{dst=display,dst{access=udp,mux=ts,dst=[FF7E:930::1234]:8000}}' --loop

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Multicast Beacon

• Measurement software to track site to site multicast

connectivity.

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Debugging Multicast

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Debugging Multicast

• Y
• u mus

t ha ve -

–

At least one constantly active source (multicast data sender)

–

At least one constantly active receiver

• Follow the R

everse Path Forwarding (R PF) from DR back towards the S

• urce

S tart from R eceive S ide -

• Check if Unicast is working (ping6 source | receiver)
• Identify PIM-SM Designated R
• uter

–

Verify the MLD S tate in the DR ( DR # show mld stats)

–

Look for (S,G) state in the DR ( DR # show ipv6 mroute)

• Verify the PIM-S

M is conf i gured on each interface along the R PF, because that determines the forwarding tree topology. R

• uter# show pim interfaces
• Check (*,G) and (S

,G) state in each router (R

• uter# show ipv6 mroute)

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Outcome of the Meeting

• Update by NR

ENs – IPv6 Status and IPv6 Multicast Status

• For up-to-date status of IPv6 Multicast monitoring

– NR

ENs gateway

– TEIN NOC will run

• Multicast beacon monitoring system
• Multicast Testing servers
• Multicast Tools at R

P

• R

egular IPv6 Multicast testing on TEIN will be performed on First Wednesday of every month ( time slot will be set according to agreement)

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Future Operation Plan

Mailing List → ipv6m cast @ interlab .ait.asia Webpage → interlab .ait.asia/tein3/ipv6m cast SDP (Session Description Page) → webpage for session announcem ent by all m em bers at com m

• n place

Twitter → twitter.com /ipv6m cast

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Thank You

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Current Status