Cisco Remote-PHY Solution Deployment

Design Considerations

This section helps you prepare for deploying the Cisco Remote-PHY solution.

Prerequisites

  • Ensure that a digital optical network is deployed between the Cisco Coaxial Media Converter (Cisco CMC) and Cisco CMTS. The supported digital optical networks are EPON, GPON, and Metro Ethernet.

  • Ensure that the data path is guaranteed between the Cisco CMTS and the Cisco CMC.

  • Reserve sufficient bandwidth for the DOCSIS traffic.

  • Network must support IPv4 multicast forwarding.

  • Ensure that the maximum latency is as low as possible.

  • Based on the input type in the network, deploy or use the appropriate type of Cisco CMC. For RF input, deploy the Cisco CMC with coaxial cable input. For optical input, deploy the Cisco CMC with the FRx.

Memory Requirements

Component Recommended Memory Requirement
Cisco uBR10012 Router with PRE4

Flash—128 MB

DRAM—2 GB

Cisco uBR10012 Router with PRE5

Flash—256 MB

DRAM—4 GB

Cisco Coaxial Media Converter

Flash—96 MB

DRAM—256 MB

Network Architecture

The Cisco Remote-PHY solution supports the Single Controller Sharing architecture. In this architecture, multiple Cisco CMC equipments share the downstream and upstream channels of a Cisco uBR-MC3GX60V-RPHY line card.

Figure 1. Single Controller Sharing Architecture

Network Topologies

This section describes some network topologies supported by the Cisco Remote-PHY solution.

Topology 1—Metro Ethernet Topology

Network Elements:

  • One Cisco uBR10012 Router

  • Hundreds of Cisco CMC devices

  • Maximum of eight Cisco uBR-MC3GX60V-RPHY line cards

  • Multiple switches

Capacity:

Maximum of 24 Gb on the downstream and 14 Gb on the upstream for one Cisco uBR10012 Router.

Figure 2. Metro Ethernet Topology



Topology 2—Switch and PON Topology

Network Elements:

  • One Cisco uBR10012 Router

  • Hundreds of Cisco CMC devices with internal ONU

  • Maximum of eight Cisco uBR-MC3GX60V-RPHY line cards

  • Multiple PON OLTs

  • Multiple switches

Capacity:

Maximum of 24 Gb on the downstream and 14 Gb on the upstream for one Cisco uBR10012 Router.

Figure 3. Switch and PON Topology



Topology 3—Pure PON Topology

Network Elements:

  • One Cisco uBR10012 Router

  • Hundreds of Cisco CMC devices with internal ONU

  • Maximum of eight Cisco uBR-MC3GX60V-RPHY line cards

  • Multiple PON OLTs

Capacity:

Maximum of 24 Gb on the downstream and 14 Gb on the upstream for one Cisco uBR10012 Router.

Figure 4. Pure PON Topology



Network Cables

Table 1 Cable Types Supported for the Cisco Remote-PHY Solution
Originating Device Target Device Cable Type Connector Type

CMTS (Gigabit Ethernet SFP module on the Cisco uBR-MC3GX60V-RPHY line card)

Switch or OLT

Ethernet cables

RJ-45 connector

Copper cables

RJ-45 connector

Optical fiber

LC Fiber-Optic connector

OLT

ONU

Optical fiber

SC Fiber-Optic connector

External ONU

Optical fiber

SC Fiber-Optic connector

Switch

Cisco CMC

Optical fiber

LC Fiber-Optic connector

ONU

Cisco CMC

Optical fiber

SC Fiber-Optic connector

External ONU

Cisco CMC

Copper cables

RJ-45 connector