1

CHEETAH applications and control-plane testing on

HOPI

Outline (Dynamic circuit) Services and applications Demonstrations (Tao Li)

CHEETAH software Distributed control-plane: Xiangfei Zhu Circuit TCP (CTCP): Mark McGinley, Helali Bhuiyan BWDetail: Mark McGinley

Virtualizer for HOPI: Mark McGinley Application: "circuit-aware" squid: Xiuduan

Fang Integrated call setup and release

Malathi VeeraraghavanUniversity of Virginiamvee@virginia.edu

2

Services & applications (for "dynamic circuit" networks)

Leased lines TCP/IPCoarse Grained Sharing (CGS)

Fine Grained Sharing (FGS)

DCS-network scope

Bandwidth-sharing modes

Dynamic circuit services in only the core network

Dynamic circuit services end-to-end

Coarse Grained Sharing (High-bandwidth circuits AND "long" holding times; Need Book-Ahead (BA) support)

Interconnect IP routers of Regional ISPs (?)

eScience applications

Video-conferencing

Distance learning Disaster recovery

Fine Grained Sharing (Moderate-BW circuits, and/or short holding time; Immediate-Request (IR) mode sufficient)

Web services (proxy, CDN)

IPTV distribution Inter-SMTP server Netnews

Video-telephony Storage Software-on-the-

web

ServiceTypes

3

HOPI-CHEETAH testbeds interconnected

ATL

SN16k

NxGbE

SN16k

SN16k

ORNLOC192

Zelda1/2/3

GbE

GbE

Zelda4/5

Wukong/Wuneng

Washington HOPI

Force10

PC3

10GbE

OC192

NYC HOPI Force10

PC3

PC3

PC3

PC3 Chicago HOPI

Force10

Seattle HOPI

Force10

LA HOPI Force10

10GbE

10GbE10GbE

10GbE

NC

HOPI

CHEETAH

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Demonstrations

CHEETAH software Distributed control-plane Circuit TCP (CTCP) BWDetail

Virtualizer for HOPI Application: "circuit-aware" squid

5

10GbE 10GbE GbE

Force10

CHEETAH Control Plane(all functions are distributed)

CCPM: CHEETAH Control-Plane Module OSPFD RSVPD Force10 programming module

CCSA: CHEETAH Client System Agent RSVPD CHEETAHD Circuit-requestor

Circuit setup procedure losa-pc1:

Use circuit-requestor to initiate setup to sttl-pc1 sends PATH meesage

losa-CCPM: Route computation, CAC, VLAN ID assignment

sttl-CCPM: Route extract, Local CAC and VLAN ID check

sttl-pc1: Configures VLAN, programs ARP and route tables Sends back RESV message

sttl-ccpm: Programs sttl-Force10 for that VLAN

losa-ccpm: Programs losa-Force10 for that VLAN; sets rate

policing

losa-pc1: Configures VLAN, programs ARP and route tables

LOSA10GbE 10GbE GbE

Force10

CCSA

CCSA

CCPM

pc1

pc2

pc3

Internet

STTLCCSA

CCSA

CCPM

pc1

pc2

pc3

6

Data-plane Circuit TCP:

disables TCP's congestion control

sets cwnd = ncap (bandwidth-delay product BDP)

BWdetail: a tool like iperf to

send/receive data PLUS

shows users important TCP parameters like cwnd (which Ethereal does not show)

Demo Configuration

Demo will use BWdetail send/recv Impact of rate-limiting parameters

BDP = 650 packets = ncap setting Committed rate = 300Mbps Buffer = 650*1500B/1024 = 952KB Peak rate = 1Gb/s

Compare CTCP and BIC-TCP BWdetail screen output (cwnd)

LOSA STTL

PC1 PC1

VLAN 621

F10 F10

MPLS tunnels

T640 T640

VLAN 6201GbE 1GbE

10 GbE 10 GbE

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Virtualizer demo description

Compare login through the Virtualizer with resource set enforcement to a direct login

Log in to Virtualizer Restricted to VLAN 620, 621, GigabitEthernet 2/0,

TenGigabitEthernet 1/0, Bandwidth 600Mbps Log in directly to switch

No restrictions

Virtualizer: a “wrapper” for authorization

Allows multiple control-plane and/or management-plane experiments to share Force10

Three sets of resources: ports VLAN IDs bandwidth

Demo Configuration

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Application: circuit-aware squid

InternetInternet

Core-only Circuit/VC

network

Core-only Circuit/VC

network

Web client Web server

Original HTTP messages HTTP

messages

HTTP and ICP messages

HTTP messages

squidsquid

• A web proxy software package: squid• "Circuit-aware" by integrating RSVP-TE & CTCP• Dynamic circuit setup triggered by web client request

• Use of circuits transparent to human users• Use Internet path while circuit is being setup

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Summary of demonstrations

CHEETAH software Distributed control-plane Circuit TCP (CTCP) BWDetail

Virtualizer for HOPI Application: "circuit-aware" squid

10

Setup a circuit from losa-pc1 to sttl-pc1

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Automatic configuration on the end host

12

Setup multiple circuits to the same remote end host

Request exceeding the available bandwidth is rejected.

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BWdetail showing BIC transfer

a

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BWdetail showing BIC transfer

Cwnd = first column Unacked = second Cwnd growth

causes losswhen 3rd column(TCP state machine) shows “3” (recovery)

15

BWdetail showing CTCP transfer

a

16

BWdetail showing CTCPtransfer

Cwnd steady

17

Virtualizer

Direct Login

Virtualizer

Resource set

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Circuit-aware Squid – cont.

The 1st request was served on the Internet while a circuit is being set up

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Circuit-aware Squid

The 2nd request was served on the established circuit