Transport Functionality - Cisco ONS 15600 Reference Manual

10.2 Transport Functionality

Each ASAP 4-port I/O (4PIO) and 1-port I/O (1PIO) PIM is hot-pluggable while other ports on other
PIMs are functioning. Each SFP is also hot-pluggable.
Layer 1 Ethernet transport is implemented for Gigabit Ethernet (GE) interfaces. GE traffic is
encapsulated by generic framing procedure (GFP), ITU X.86, or Cisco high-level data link control/LAN
extension (HDLC/LEX) and mapped into an SDH payload.
The data path processing consists of:
•
•
For a single flow of Gigabit Ethernet, traffic can be mapped to an VC4-16c. This choice limits maximum
Note
usable Ethernet ports to eight when all are mapped to VC4-16c. Any time an VC4-16c is used for an
Ethernet connection, one-eighth of the total card bandwidth is consumed on the EoS mapper.
Ethernet facilities on the ASAP card include:
•
•
•

10.2 Transport Functionality

Figure 10-1
ONS 15600 SDH.
Cisco ONS 15600 SDH Reference Manual, Release 9.0
10-2
Optical-to-electrical conversion (O/E) and electrical to optical (E/O) on the 4PIO PIM
Gigabit Ethernet to Ethernet over SDH (EoS) mapping (for the GE ports only)
Ethernet ports can be provisioned on a multirate PPM.
Encapsulation methods allowed for the Ethernet ports are:
Cisco HDLC/LEX
–
GFP
–
ITU X.86
–
Provisioning of an Ethernet port automatically provisions a POS port for the connection and circuit.
shows the transport of Ethernet frames into an SDH path using the ASAP carrier card in the
Chapter 10 Ethernet Operation
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