1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential Session Number Presentation_ID Next Generation Network Architectures Summary John

1© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialSession NumberPresentation_ID

Next Generation Network ArchitecturesSummary

John Scudder

David Ward


Goal for NGNA Session

The network of 10 years from now won’t be the network of today. Our goal for this session is to consider some ideas which may influence what the Internet of the future will be.

These ideas include network testbeds, new architectural proposals both incremental and radical, and improvements to existing routing protocols.


Wrap-up

Areas of interest from Cisco

Input from researchers to Cisco


Problems Cisco would like to see addressed

• FRR - can classes of service have different repair domains, is hierarchical recovery possible

Unicast

Multicast

MPLS - LDP

• Convergence - what is really seen on the internet, what is impact on traffic matrix

Interdomain

Current route flap analysis does not show us the rate at which the internet converges or what causes impact

Intradomain

Ways to improve leaking across summarization boundaries


Problems Cisco would like to see addressed .2

• Addressing schemes

Locator vs identity for mobility and V6

• Integration of routing and services

Content/application server requiring topology awareness

for client or domain forwarding

• Link routing and topology utilization information

Experience w/ metric manipulation (dead end)



• Utility of flow based routing

Need quantitative analysis that flow routing gives different routing and service treatment results than per packet

• Analysis of optimized exit routing

Does it solve congestion problems? Does it look at correct parameters?

• Security

Full attack tree of protocols and routers

What in routing system needs to be secured? Announcements

Src checks at borders for DDOS in interdomain system

Multicast join security, faster channel-change

Infrastructure based routing security with acceptable cost/benefit tradeoff



• High availability

Analysis of SSO techniques and failure modes

What is actual recovery time of forwarding plane (given meshiness of internet) that is visible?

Analysis of network design and # of 9’s

topology, traffic matrix, service class - uni & multicast

• Traffic oscillation

Do we have other fundamental problems w/ protocols

Interdomain convergence causing oscillation

• Assumptions of Hot-potato routing completely wrong?

Given what we have discussed is a better technique to keep packets within a domain as long as possible for guarantees?

• Interdomain service signaling

Across borders or end to end?



• Ops

Can we infer routing policies of peers?

Can we infer traffic pattern from routing policy modeling?

Cognitive issues in policy languages

Event logs and programmable events?


What do you want from Cisco?

• What new data can we generate that you don’t have that would get us results

• What new protocol extensions would allow you to tap protocols and/or observe impact of policy?

• How can we organize ourselves?

What does the academic/research community need/want in Cisco routers/software?

Do you want to go individual per proposal or as a community?


Opportunities

• Future routers will have

More memory

More CPU (cores, GHz, etc)

Line-rate tunneling

Hooks into higher layers

And the kitchen sink

• What can this enable?

• What do you want added?


Documents

1 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential Session Number Presentation_ID Next Generation Network Architectures Summary John