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The endpoints attached to each of the 39 access and data center switches were configured to generate the following unicast traffic: •G.711 voice calls—Real-Time Protocol (RTP) streams.

•94 x TCP/UDP data stream types emulating Call Control, Bulk data (ftp), mission-critical data (HTTP, tn3270), POP3, HTTP, DNS, and WINS.

•IPTV Audio streams @ 93kbps (1278 byte payload, RTP = MPEG2).

•Net Meeting Video streams @ 64kbps (522 byte payload, RTP = H.261) •Net Meeting Audio streams @ 12kbps (44 byte payload, RTP = G.723) •Real Audio streams @ 80kbps (351 byte payload, RTP = G.729) •Real Media streams @ 300kbps (431 byte payload, RTP = H.261) •Multicast FTP streams @ 4000kbps (4096 byte payload, RTP = JPEG) In keeping with the intent of this testing to aid in understanding the impact of failure events on application and voice traffic flows in a production network, the convergence results recorded in this document are based on measurements of actual UDP and TCP test flows.

It is intended to provide a reference point for evaluating design choices during the building or upgrading of a campus network.

This section includes the following topics: •Summary of Convergence Analysis •Campus Designs Tested •Testing Procedures •Test Bed Configuration •Test Traffic •Methodology Used to Determine Convergence Times An end-to-end Layer 3 design utilizing Enhanced Interior Gateway Routing Protocol (EIGRP) provides the optimal recovery in the event of any single component, link, or node failure.

•IPTV Video streams @ 1451kbps (1460 byte payload, RTP = MPEG1).The following configurations were used: •Core switches—2 x 6500 with Sup720 (Native IOS-12.2(17b)SXA) •Server farm distribution—2 x 6500 with Sup2/MSFC2 (Native IOS-12.1(13)E10) •Server farm access switches—2 x 6500 with Sup1A (Cat OS-8.3(1)) •Distribution switches—2 x 6500 with Sup720 (Native IOS-12.2(17b)SXA) •Access switches –1 x 2950 (IOS-12.1(19)EA1a) –1 x 3550 (IOS-12.1(19)EA1) –1 x 3750 (IOS-12.1(19)EA1) –1 x 4006 with Sup II (IOS-12.1(20)EW) –1 x 4507 with Sup IV (IOS-12.1(20)EW) –1 x 6500 with Sup1A (Cat OS-8.3(1) ) –1 x 6500 with Sup2/MSFC2 (IOS-12.1(13)E10) –32 x 3550 (IOS-12.1(19)EA1) Each access switch was configured with 3 VLANs configured in a loop-free topology: •Dedicated voice VLAN •Dedicated data VLAN •Unique native uplink VLAN 180 Chariot endpoint servers were used to generate traffic load on the network during tests as well as gather statistics on the impact of each failure and recovery event.The Chariot endpoints were configured to generate a mix of enterprise application traffic flows based on observations of actual Cisco customer networks.The test configuration is intended to demonstrate the effectiveness of Cisco best practices design in a real world environment. •The campus network supports transactional and bulk data applications.Testing assumptions were the following: •The campus network supports Vo IP and streaming video. The test bed used to evaluate failure recovery consisted of a Layer 3 routed core with attached distribution and server farm blocks.

•IPTV Video streams @ 1451kbps (1460 byte payload, RTP = MPEG1).The following configurations were used: •Core switches—2 x 6500 with Sup720 (Native IOS-12.2(17b)SXA) •Server farm distribution—2 x 6500 with Sup2/MSFC2 (Native IOS-12.1(13)E10) •Server farm access switches—2 x 6500 with Sup1A (Cat OS-8.3(1)) •Distribution switches—2 x 6500 with Sup720 (Native IOS-12.2(17b)SXA) •Access switches –1 x 2950 (IOS-12.1(19)EA1a) –1 x 3550 (IOS-12.1(19)EA1) –1 x 3750 (IOS-12.1(19)EA1) –1 x 4006 with Sup II (IOS-12.1(20)EW) –1 x 4507 with Sup IV (IOS-12.1(20)EW) –1 x 6500 with Sup1A (Cat OS-8.3(1) ) –1 x 6500 with Sup2/MSFC2 (IOS-12.1(13)E10) –32 x 3550 (IOS-12.1(19)EA1) Each access switch was configured with 3 VLANs configured in a loop-free topology: •Dedicated voice VLAN •Dedicated data VLAN •Unique native uplink VLAN 180 Chariot endpoint servers were used to generate traffic load on the network during tests as well as gather statistics on the impact of each failure and recovery event.The Chariot endpoints were configured to generate a mix of enterprise application traffic flows based on observations of actual Cisco customer networks.The test configuration is intended to demonstrate the effectiveness of Cisco best practices design in a real world environment. •The campus network supports transactional and bulk data applications.Testing assumptions were the following: •The campus network supports Vo IP and streaming video. The test bed used to evaluate failure recovery consisted of a Layer 3 routed core with attached distribution and server farm blocks.One of the major advantages of the hierarchical design is the segregation of fault domains.