Future Internet’s Content Anycasting Using OpenFlow

Professor OKAMURA Laboratory.Othman Othman M.M.

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Outline:1. Goal .2. Current Technologies.3. Anycast Scenario4. BitTorrent (P2P) Scenario.5. Advantages of Combining Technologies.6. How to Combine Technologies.7. Implementation.8. Conclusion.9. Q&A.

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1-Goal:Nowadays many Future Internet researches,

technologies going.

OpenFlow is one of candidate Future Internet technologies.to create Circuit based like systems.

To support mobility, computing centers ……

Important to show new ways to use OpenFlow to provide new services or improve current ones.That make use of OpenFlow capabilities other than

circuit like.To have contents with high availability.

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2-Current Technologies:Anycast:

Multiple nodes with the same address (Sa).

Packet sent to (Sa) will be delivered to the node with nearest location.

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Peer to Peer:Depends on user clients

to provide service.Implements an

application layer overlay network.

Fig 2. BitTorrentSource :http://en.wikipedia.org/wiki/Image:Torrentcomp_small.gif

Sa

Sa

SaFig 1. Anycast

3-Anycast Scenario:

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10.10.10.1

10.10.10.1

Cont 1Cont 2Cont 3Cont

n

Cont 1Cont 2Cont 3Cont

n

Cont 1Cont 2Cont 3Cont

n

10.10.10.1

10.10.10.1

Client will send

packet to

10.10.10..1

Network will choose end node based on routing

measures

4-BitTorrent (P2P) Scenario:

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Tracker

100%Seeder

100%Seeder

70%

30%

0%

5-Advantages of Combining Technologies 1/3:Anycast.Content Centric

Networks.Peer to Peer.

Combination of those technologies:Users contributing in service: to improve the

availability, and improves the overall use of bandwidth in whole network.

Regular Client/Server

User contributionIn Content Anycasting

5-Advantages of Combining Technologies 2/3 :Anycast.Content Centric

Networks.Peer to Peer.

Combination of those technologies:Choosing destination by network: to remove the

burden of finding destination and thus a faster response.

Tracker

Tracker Role in BitTorrentChoosing Destination By NetworkIn Content Anycasting

?Content Server

OpenFlow Router

5-Advantages of Combining Technologies 3/3 :Anycast.Content Centric

Networks.Peer to Peer.

Combination of those technologies:Content ID: to have more flexibility down to the

level of contents rather than the node level.

Using Content IDIn Content Anycasting

Content Server

Decision based on:

• IP address.• Content ID.

Regular

Content Server

Decision based on:

• IP address.• sometimes port#

OpenFlow Router

6-How to Combine Technologies:Content anycasting does its rule by using:

OpenFlow for the process of choosing the destination, along with the aid of the content server.

A new procedure for requesting content is introduced to enable the clients to get the contents.

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Content Server

Client A

Anycast Manager

Client B

Su

AuBu

Get Content

ID?

Content ID = X

To: SuCont id=X

To: AuCont id=X

Redirection Req.

Threshold

reached

Redirection

OpenFlow Router

7- Implementation:Currently building redirection system, modified

content server, modified clients and using the reference OpenFlow implementation.

Aiming to measure: increase in number of clients getting served, communication cost, response time and others.

comparing those values to other solutions like regular client/server model. 11

Content Anycasting

Anycast Manager

OpenFlow Router

Regular Client/Server

Compare

8- Conclusion:New mechanism for requesting content is

designed to enable content anycasting.Make use of content id.Requesting the content id.Using the content id in the process of getting the

content.

A new transport protocol is designed (modification to TCP) to be used.Added some fields in the header.

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8- Q&A:Thank you for listening.

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Backup:

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3-Limitations of Current Technologies:

Anycast:All of the content

servers must have identical contents.

Lacks the flexibility, and not dynamic.

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Peer to Peer:Overhead because of

overlay nature, protocol, peer discovery, and looking up in index.

Service depends on user’s contribution.

10.10.10.1

10.10.10.1

192.168.0.2

192.168.0.1

Router 1Router 2

Router 3 Router 4

Destination Next-Hop Distance

192.168.0.0 127.0.0.1 010.0.0.1 192.168.0.1 110.0.0.1 192.168.0.2 2

Cont 1Cont 2Cont 3Cont

n

Cont 1Cont 2Cont 3Cont

n

Fig 2. BitTorrentSource : http://computer.howstuffworks.com/bittorrent2.htm

4-Advantages of Combining Technologies:Advantages of Anycast:

Fast and does not require any effort of the users, because choosing destination (decision making) is done in the network.

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Advantages of Peer to Peer:High availability of popular

contents, due to users’ contribution in providing service.

Combination of those technologies:Choosing destination by network: to remove the

burden of finding destination and thus a faster response.

Users contributing in service: to improve the availability, and improves the overall use of bandwidth in whole network (reduce bandwidth used by server).

Content ID: to have more flexibility down to the level of contents rather than the node level.

Content Centric Network:Treats contents as a primitive

not the connection.

8- Usage Scenario:

Content Server

Client A

Anycast Manager

Client B

1

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10.10.10.1

192.168.10.1192.168.20.1

if Destination IP: 10.10.10.1 & Content id: 12345Change : Destination IP: 192.168.10.1

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8- Usage Scenario:This figure shows

the first phase of the content request.

Step 1: client B requests the content id.

Step 2: server sends the content id to the client B.

Content Server

Client A

Anycast Manager

Client B

1

2

10.10.10.1

192.168.20.1192.168.10.1

Content id: 12345

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8- Usage Scenario:

Content

Server

Client A

Anycast Manager

Client B

1

2

3

Destination IP: 192.168.10.1Content id: 12345

10.10.10.1

192.168.10.1192.168.20.1

Destination IP: 10.10.10.1Content id: 12345

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9- OpenFlow Overview:Separates routing decision making (in controller)

and the forwarding (in the switch or router).

Matching in the switch or router is done according to Layer 2, 3 and VLAN headers.

Figure 1: OpenFlow switch (ref: Nick McKeown et al, “OpenFlow: enabling innovation in campus networks”)

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9- OpenFlow Overview:OpenFlow relies on the Flow-table, which is contains:

Header fields are the ones the incoming packet is matched against:

The actions can be : forwarding the packet to physical port, enqueue the packet in a physical port’s queue, dropping the packet or modifying incoming packet’s header fields

Figure 2

Figure 1

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