XMC20 COGE5 - Core Unit of the XMC20 Platform
The COGE5 is a core unit for the XMC20 subracks, designed for packet-switched transport and optimized for applications in mission-critical networks. It performs all central functions of the system and data transport for the Ethernet traffic and data synchronization.
Features:
- Support of Optical and Electrical Ethernet interfaces
- MPLS-TP capable for packetswitched transport networks
- ERPS for Protection Switching in Ethernet rings
- Core Unit Redundancy support
- SyncE and IEEE 1588v2 on all Ethernet front ports
- OSPF Routing for Management traffic
MPLS-TP Transport - COGE5 is capable of supporting MPLS-TP functionality, providing the application of MPLS to the construction of packet-switched transport networks. MPLS-TP allows provisioning of explicit co-routed bi-directional connection-oriented paths, protection (1:1) and restoration mechanisms (below 50 ms), comprehensive set of functions for operation and maintenance of a network without a dynamic control plane and IP forwarding.
Interfaces - COGE5 comes with three electrical interfaces and two cages for optical SFP+ or SFP modules. Two 10 GbE or 1 GbE uplinks can be realized as well as a redundant 1:1 connection for protection of the transmission. The 10/100/1000BaseT interfaces can be used for cascading or ring connection with other XMC20 or also for the uplink.
ERPS for protection switching - COGE5 supports Ethernet Ring Protection Switching (ERPS) for rapid restoration within Ethernet networks in ring topologies. ERPS compliance with ITU-T G.8032v2 allows ring interconnections supporting major/subring configurations and multiple ERP instances (or multiple logical rings.
1:1 equipment protection - COGE5 can be installed redundantly in the XMC20 subracks. One works in a standby mode and takes over operation in case a failure occurs in the active unit. This mechanism ensures highest availability of the system.
Timing and synchronization - The timing and synchronization functionalities include a 2 Mbps reference clock input as well as Synchronous Ethernet (SyncE) and IEEE 1588v2 (PTP) support. These options allow for synchronous timing and a very high timing precision of sub-microseconds that are required for various applications.
Management - All services are managed centrally via the management system UNEM or via the local craft terminal ECST.
Specifications:
Optical Interfaces: 2 x 10 GbE with SFP+ modules (10GBASE-LR)/GbE with SFP modules (1000BASE-SX/-LX/-EX/-ZX)
Electrical Interfaces: 3 x 10/100/1000BASE-T/TX (RJ45) with auto-negotiation (half/full duplex modes)
Synchronisation:
- SyncE: Synchronous Ethernet acc. to ITU-T G.8262 to transfer clock signals over Ethernet physical layer.
- SyncE ESMC: Ethernet Synchronization Messaging Channel acc. to ITU-T G.8264 for indication of clock quality level
- PTP: Precision Time Protocol version 2 acc. to IEEE 1588-2008 for the synchronization of NE clock and time of day (ToD)
Ethernet Functions:
VLAN services:
- Customer bridging acc. to IEEE 802.1Q-2011, 4096 VLANs supported
- Port-based customer VLAN tunnelling (Q-in-Q)
- Port-/PCP-/DSCP-based classification (CoS) of ingress traffic with eight priority queues per port
- Maximum frame length of up to 9’216 bytes (Jumbo frames)
Port Mirroring: Up to 32 source ports (RX/TX traffic) to a single mirror port
Port Security: Ingress Storm Control (flood control, flood rate limiting)
Spanning tree protocols:
- RSTP (Rapid Spanning Tree Protocol), acc. to IEEE 802.1D-2004
- MSTP (Multiple Spanning Tree Protocol), acc. IEEE 802.1Q-2011
ERPS: Ethernet Ring Protection Switching (ERPS), acc. to ITU-T G.8032v2, supporting up to 12 ERP instances
MPLS-TP:
- MPLS-TP function acc. to IETF RFC5921
- Deterministic (static) LSP/PW configuration without the use of control plane protocols
- Co-routed bidirectional LSP supporting 1:1 linear protection
- MPLS-TP L2 VPN support for VPWS and VPLS (future option)
Management:
Functions:
- Management and control of XMC20 subracks and all plug-in units
- Database with management information, Embedded software download
- Alarm collection and notification, External alarm interfacing via backplane and management
- OSPF routing for management traffic, Management via PDH ECC
ECST: For local management system
UNEM: For central management system
Power Supply Input Voltage nominal (min/max): –48/–60 V DC (–39.5 V DC … –72 V DC)
Operating Temperature: According to XMC20 environmental specifications
