Cisco SGE2000 Configuration Guide - Page 34

Information About Topology Considerations Chapter 3 Information About Topology Figure 3-4 Subscriber SCE Platform Dual Link Receive-Only Topology Router Optical splitter Router Network PWR A PWR B STATUS BYPASS LINK RX TX Link 1 Cisco SCE 2000 Series 4xGBE LINK RX TX LINK RX TX LINK RX TX RX MM TX RX MM TX GBE-1 SUB LINE NET RX MM TX RX MM TX GBE-2 SUB LINE/CASCADE NET Link 2 92797 Subscriber Router Optical splitter Router Network Note When implementing receive-only topologies with a switch, the switch must support SPAN functionality that includes separation between ingress and egress traffic and multiple SPAN-ports destinations. Information About Two Cascaded SCE 2000s For Dual Links In this topology, two cascaded SCE 2000 s are used. This allows a fail-over solution, where in case of a failure of one SCE 2000 the functionality that the SCE 2000 provides is preserved by the redundant platform. • Two Cascaded SCE 2000s: Inline Topology Two Cascaded SCE 2000s: Inline Topology This topology allows both control and monitoring functionality where redundancy is required and "inline" connection is used. The two SCE 2000 s are cascaded, so the primary SCE 2000 processes the traffic of the two links, while the secondary SCE 2000 only bypasses the traffic of its links to the primary SCE 2000 for processing, and then bypasses the processed traffic back to the link. The two SCE 2000 s also exchange keep-alive messages and subscriber state information. Cisco SCE 2000 4xGBE Installation and Configuration Guide 3-8 OL-7824-06