The Open Network Lab

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1 The Open Network Lab Ken Wong Applied Research Laboratory Computer Science and Engineering Department (ONL) National Science Foundation ANI , CNS , REL Sample ONL Session Bandwidth Usage Network Configuration Routing Tables Queue Length Queue Parameters 2 - Ken Wong 9/19/2007

Gigabit Router ONL Hardware Smart Port Card

Port Extender 3 - Ken Wong 9/19/2007 Testbed

logins onl server control network onlusr

2,3 0 GE 1 2,3 0 GE 1 2,3 0 GE 1 2,3 NSP1

2 Gigabit Router ONL Hardware Smart Port Card Field Prog. Port Extender 3 - Ken Wong 9/19/2007 Testbed Organization YOU usr Internet firewall onl logins onl server control network onlusr onlsrv CP 3 2 CP CP 3 2 CP GE 1 2,3 0 GE 1 2,3 0 GE 1 2,3 0 GE 1 2,3 NSP1 NSP2 NSP3 NSP experiment network configuration switch 4 - Ken Wong 9/19/2007

3 Get An Account video onl.arl.wustl.edu, onl.wustl.edu, tutorial get an account onluser group 24-hour confirmation 1 password for web & hosts 5 - Ken Wong 9/19/2007 Properties of ONL Accounts Same password for Web login and host login Host account restrictions»can only SSH to onl.arl.wustl.edu from remote n Actually end up on onlusr, the ONL user host»firewall blocks all connections from within ONL n Can t push from ONL host to remote host n Can t pull to ONL host from remote host n But can push to ONL host from remote host n But can pull from ONL host from remote host n No »can only access onlusr host and hosts assigned to your experiment Password-free SSH between ONL hosts 6 - Ken Wong 9/19/2007

Getting Started download Remote Lab Interface Software (java jar file) extra links getting started testbed status reservations install Java runtime environment verify that you can SSH to onl.arl.

4 Getting Started download Remote Lab Interface Software (java jar file) extra links getting started testbed status reservations install Java runtime environment verify that you can SSH to onl.arl.wustl.edu configure SSH tunnel for RLI 7 - Ken Wong 9/19/2007 SSH Tunnel Configuration Cookbook for 3 approaches»unix or Unix-like (e.g., cygwin) n ssh -L 7070:onlsrv:7070 onl.arl.wustl.edu n I use this (defined as an alias) from Linux»MS Windows PuTTY (GUI-based) n I use this from MS XP laptop n See Tutorial for URL (free software)»ms Windows SSH client tool from SSH Corp Follow instructions on ONL web pages»don t agonize over it See TA after 2 tries»if problems, send to your grader/consultant 8 - Ken Wong 9/19/2007

(for detailed discussion)» Tutorial The Remote Laboratory Interface» Tutorial Examples The Remote Laboratory Interface Topology»

5 PuTTY SSH Tunnel Configuration external host name = onl.arl.wustl.edu session name = rli local port 7070 remote host onlsrv remote port Ken Wong 9/19/2007 Demo 1 (Topology ) Tutorial Pages (for detailed discussion)» Tutorial The Remote Laboratory Interface» Tutorial Examples The Remote Laboratory Interface Topology» Add Cluster» Add Host» Add Link» Save configuration Generate Default Routes Spin handle and Port 0 Reserve resources Commit (bind to real resources) Some implementation details 10 - Ken Wong 9/19/2007

Configuring Topology Port 0 used for Control Processor.

For all ports Cluster includes: NSP router, GE switch, fixed set of 5

allocated until after commit 11 - Ken Wong 9/19/2007 Save Configuration

6 Configuring Topology Port 0 used for Control Processor. Spin handle rotates ports. Add hosts and links as needed. For all ports Cluster includes: NSP router, GE switch, fixed set of 5 hosts Drag icons to improve visual layout Actual hardware NOT been allocated until after commit 11 - Ken Wong 9/19/2007 Save Configuration You do NOT need to be connected to the ONL testbed until you commit!!! ~/.onldir by default 12 - Ken Wong 9/19/2007

Make Reservation 13 - Ken Wong 9/19/2007 Result of

7 Reserve Resources Maximum resource request Make reservation Can also reserve through RLI: File Make Reservation 13 - Ken Wong 9/19/2007 Result of Reservation Current reservations 14 - Ken Wong 9/19/2007

Commit and Testbed Status onl010, onl009, etc being

and configure commit takes 1-5 minutes Cluster 3 is

Ken Wong 9/19/2007 Commit Done Dark links and

from onlusr (no password) Host has 2 interfaces

8 Commit and Testbed Status onl010, onl009, etc being allocated to my experiment #176 Allocate hardware and configure commit takes 1-5 minutes Cluster 3 is initializing will be my NSP 1 Testbed Status 15 - Ken Wong 9/19/2007 Commit Done Dark links and icons: commit done Can SSH to control net hostname from onlusr (no password) Host has 2 interfaces control: onl007 data: or n1p Ken Wong 9/19/2007

Internal Interface IP Addresses 192.168.1.33 Control Network: 10.0.0.X 192.168.1.34 CP 192.168.1.128 192.168.1.32 192.168.1.48 192.168.1.112 192.168.1.96 192.168.1.80 192.168.1.64 Data Network: 192.

9 Internal Interface IP Addresses Control Network: X CP Data Network: N.Y where N = NSP# Y = 16 x (1 + port#) 17 - Ken Wong 9/19/2007 Verifying Host Configuration eth0: control net eth1: data net nestat i: Display interface summary MAC address IPv4 address of testbed interface ifconfig eth1 Display interface config info 18 - Ken Wong 9/19/2007

10 Default Route Tables RTs are really Forwarding Tables CIDR net. addr. out-going port# pkt count default routes added after pkt 65 Select: Port 2 => Route Table 19 - Ken Wong 9/19/2007 Pkt Forwarding at P2 and P3 Inputs? send 5 ping pkts Select: Port 2 Route Table Port 3 Route Table 6 Pkts: 1 ARP, 5 ping 20 - Ken Wong 9/19/2007

11 End Demo Ken Wong 9/19/2007 n1p2 interface pkt Ether frame Packet Processing Example 22 - Ken Wong 9/19/2007 Port 2 (Ingress Side) Virtual Output Queues voq 0 + sh PS RT i m voq 3 hash on IP header ATM switch fabric ATM cells shim+hdr+pkt body (AAL5 frame with shim) Port 3 (Egress Side) (qids ) dgram res flow PS shim+hdr+pkt body n1p3 interface Ether frame pkt Pkt path from n1p2 to n1p3» n1p2 interface Port 2 (ingress) ATM switch Port 3 (egress) n1p3 interface Store and Forward queues with PS (Packet Schedulers) Shim is a special header - s h i m

12 Password-Free SSH Optional»reduces keystrokes associated with: n connecting remote terminal to onl.arl.wustl.edu (onlusr) or n copying (scp) from non-onl host to onl.arl.wustl.edu (onlusr)»not the RLI tunnel described before»no passwords required on ONL nodes anyway See Tutorial Summary Information Password-Free SSH»how to set up SSH agent n avoids having to enter password when SSHing to onl.arl.wustl.edu 23 - Ken Wong 9/19/2007 Concept Check 1 How can I convert the current configuration to mimic the diagram below using 1 NSP??? bottleneck n1p2 n1p1a n1p1b n1p1c Router Router n1p3 n1p Ken Wong 9/19/2007

13 Demo 2 (Loop Topology) Add host Add link Simple traffic monitoring 25 - Ken Wong 9/19/2007 Add Monitoring Display poll every 0.3 sec chart name 26 - Ken Wong 9/19/2007

14 Ping Chart window width halved select max y-value = Ken Wong 9/19/2007 Adding A Link drag from port 7 to port Ken Wong 9/19/2007

15 Using Longest Prefix Match (LPM) Commit green and blue traffic 29 - Ken Wong 9/19/2007 Using Longest Prefix Match 30 - Ken Wong 9/19/2007

End Demo 2 31 - Ken Wong 9/19/2007 Some Monitoring

RT voq 0 voq 3 PS ATM Switch d PS 184 64 dgram a, b, d

16 End Demo Ken Wong 9/19/2007 Some Monitoring Points Are NOT Inside Port a b c Port 2 (Ingress Side) RT voq 0 voq 3 PS ATM Switch d PS dgram a, b, d are inside switch, not port (Egress Side) 32 - Ken Wong 9/19/2007

17 Concept Check 2 16 Mbps sender 8 Mbps bottleneck n1p2 n1p1a n1p1b n1p1c Router Router n1p3 n1p4 If link 7-6 has capacity 8 Mbps, about how many 1000-byte pkts do I need to send from n1p2 to n1p3 at 16 Mbps to make the flow last about 5 seconds??? 33 - Ken Wong 9/19/2007 Experiment 8 Mbps bottleneck sndr (16 Mbps UDP) rcvr 8 Mbps bottleneck link (p7-p6 link) Send byte UDP pkts from n1p2 to n1p3 at 16 Mbps Direct all pkts at egress port 7 to queue 300 Observe length of queue 300 at port Ken Wong 9/19/2007

18 Egress Link Bandwidth and Queue 300 Set link rate 5,000,000-byte queue Granularity: 54 Kbps Commit 35 - Ken Wong 9/19/2007 Direct All Pkts to Queue 300 Edit Add General Match Filter lower higher priority RT is priority Ken Wong 9/19/2007

19 Monitor Size of Queue 300 at Port 7 Monitoring Add Monitoring Display Port 7 Monitoring/Egress QLength Fill out dialogue box 37 - Ken Wong 9/19/2007 iperf client and server UDP client send to n1p3 at 16 Mbps 1000-byte pkts 5,000,000 bytes = 4.77 MBytes UDP server 0 Drops (0%) Seqnum: Recv rate = 7.78 Mbps Jitter = msec 38 - Ken Wong 9/19/2007

20 Queue Length (QID 300) Duration of initial phase??? Slope of initial phase??? Size of transmission interval??? 39 - Ken Wong 9/19/2007 Packet Processing With GM Filter n1p2 interface Port 2 (In) Virtual Output Queues voq 0 + sh PS RT i m voq 7 ATM switch fabric - s h i m Port 7 (Out) GM dgram PS qid 300 res flow n1p3 interface - s h i m dgram PS res flow Virtual Output Queues voq 0 + PS sh RT i m voq Ken Wong 9/19/2007 Port 3 (Out) Port6 (In)

The Open Network Lab (Part 1)

The Open Network Lab (Part 1) Ken Wong Applied Research Laboratory Computer Science and Engineering Department http://www.arl.wustl.edu/~kenw kenw@arl.wustl.edu http://www.onl.wustl.edu (ONL) National