Testing PPPoX and L2TP Broadband Access Devices - Ixia

More documents

Recommendations

Info

• Session tear down test: − Test tool to tear down sessions at a fixed rate (e.g. 100 sessions per second). See Figure 6 for details. • Figure 6: PPP session tear down 6 Copyright © Ixia, 2004 PoE Test Plan
• Simulate an access link failure for each of the above test cases. Note the number of session retries and session recovery times. • Simulate a system failure for each of the above test cases. Note the number of session retries and session recovery times. 2. PPPoX Client and Server Performance and Scalability Test 2.1 Objective The objective of this test is to characterize the performance of both LAC and LNS/B-RAS devices when forwarding 32,000 PPPoX sessions including both control and data plane traffic. The test is split into two phases, namely: • Control plane traffic generation (PPPoE, PPPoA, PPPoEoA, PPPoEoVLAN). • Data plane traffic generation (IMIX and fixed frame sizes at 100% utilization). 2.2 Setup When emulating both client and server, the test tool creates the requested number of subscribers (i.e. 32,000 in this case) as well as terminates the incoming PPP sessions, thus bracketing the DUT. The DUT may consist of single or multiple devices (e.g. DSLAM). As shown in Figure 7, an Ixia GigE Load Module port (copper or fiber) or ATM Load Module port (OC3 or OC12) may be used to generate the required number of PPP sessions. In addition, these ports generate the data plane IP traffic. 2.3 Input Parameters The primary input parameters for each phase include: • Session setup rate & latency – maximum, minimum and average time and latency to establish all sessions with either no authentication, PAP or CHAP authentication. • Interfaces, VLANs and domain groups for access and network ports. • Traffic generation – upstream/downstream/bi-directional for stateless L3/L4 traffic (IMIX or fixed frame distributions). • Session teardown rate. 2.4 Test Methodology and Result Generation • Session setup test: − Test tool to generate 32,000 PPPoX sessions. − Record setup rates and latency measurements outlined in section 1.2. − Record the number of sessions in the DUT. • Traffic generation over PPPoX test: − Test tool to generate L2/3 stateless traffic. For example, 20% upstream and 80% downstream IMIX traffic (64, 128, 512, 1024 and 1518 byte frames over TCP). See Figure 3 in Section 1 for setup details. • Session tear down test: − Test tool to tear down sessions at a fixed rate (e.g. 100 sessions per second). Access Side - PPPoE, PPPoEo802.1q - PPPoEoA, PPPoA DUT Access Concentrator Network Side - PPPoE, PPPoEo802.1q - PPPoEoA, PPPoA 10/100/1000 Ethernet Or OC3/OC12 ATM 10/100/1000 Ethernet Or OC3/OC12 ATM Figure 7: PPPoX client and server emulation setup PoE Test Plan Copyright © Ixia, 2004 7
Page 1 and 2: Testing PPPoX and L2TP Broadband Ac
Page 3 and 4: Overview Modern broadband networks
Page 5 and 6: Figure 3: Latency results − Recor
Page 7: • Record throughput results. See
Page 11 and 12: 3.4 Test Methodology and Result Gen
Page 13 and 14: • Traffic generation over PPPoX t
Page 15: 4.4 Test Methodology and Result Gen

Testing PPPoX and L2TP Broadband Access Devices - Ixia

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?