Core IP Routing and Switching Technology - Cvt-dallas.org
Core IP Routing and Switching Technology - Cvt-dallas.org
Core IP Routing and Switching Technology - Cvt-dallas.org
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Where We are Today<br />
• A lot of legacy equipment – designed first to<br />
support TDM then adapted to fit packets.<br />
• Must cross multiple layers to transit the core:<br />
– Outside plant fiber, DWDM transmission<br />
– SONET/SDH multiplex equipment<br />
– Crossconnect equipment (protection, grooming)<br />
– <strong>Routing</strong> <strong>and</strong> <strong>Switching</strong> equipment<br />
• Multiple service devices<br />
– Frame Relay<br />
– ATM<br />
– Ethernet MAN<br />
– Packet over SONET (POS)<br />
– Everything over MPLS (soon…)<br />
• Trend: <strong>IP</strong> over Everything, Everything over <strong>IP</strong> 1<br />
– over MPLS?<br />
1<br />
Vint Cerf, Worldcom<br />
4
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