Datasheet

5-21
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 5 Ethernet Cards
5.9.1 CE-100T-8 Card-Level Indicators
The following paragraphs describe the general functions of the CE-100T-8 card and relate to the block
diagram. In the ingress direction, (Ethernet-to-SDH), the PHY, which performs all of the physical layer
interface functions for 10/100 Mbps Ethernet, sends the frame to the network processor for queuing in
the respective packet buffer memory. The network processor performs packet processing, packet
switching, and classification. The Ethernet frames are then passed to the Ethermap where Ethernet traffic
is terminated and is encapsulated using HDLC or GFP-F framing on a per port basis.
The encapsulated Ethernet frames are then mapped into a configureable number of concatenated or
virtual concatenated payloads.
The SDH SPEs carrying encapsulated Ethernet frames are passed onto the qMDM FPGA, where the
STM-1 frames are multiplexed to form an STM-4 frame. The STM-4 frame is transported over the SDH
network by means of the Bridging Convergence Transmission (BTC) ASIC.
In the Egress direction (SDH-to-Ethernet), the FPGA extracts four STM-1 frames from the STM-4 frame
it receives from the BTC and sends each of the STM-1s to the ET3 mappers. The STM-1 SPE carrying
GFP-F or PPP/HDLC encapsulated Ethernet frames is then extracted and buffered in Ethermap’s
external memory. This memory is used for providing alignment and differential delay compensation for
the received virtual concatenated payloads. After alignment and delay compensation have been done, the
Ethernet frames are decapsulated with one of the framing protocols (GFP-F or HDLC). Decapsulated
Ethernet frames are then passed onto the network processor for QoS queuing and traffic scheduling. The
network processor switches the frame to one of the corresponding PHY channels and then to the Ethernet
port for external transmission.
For information on the CE-100T-8 QoS features, see the Ethernet Card Software Feature and
Configuration Guide for the Cisco ONS 15454, Cisco ONS 15454 SDH, and Cisco ONS 15327.
5.9.1 CE-100T-8 Card-Level Indicators
The CE-100T-8 card faceplate has two card-level LED indicators, described in Table 5-17.
5.9.2 CE-100T-8 Port-Level Indicators
The CE-100T-8 card has two LEDs embedded into each of the eight Ethernet port RJ-45 connectors. The
LEDs are described in Table 5-18.
Table 5-17 CE-100T-8 Card-Level Indicators
Card-Level LEDs Description
FAIL LED (Red) A steady red indicates equipment failure on the CE-100T-8 card. A blinking
red indicates the card is rebooting and going through memory check.
ACT LED (Green) A steady green indicates an active card with operational software.
Table 5-18 CE-100T-8 Port-Level Indicators
Port-Level Indicators Description
LINK LED on Individual Port A steady green indicates that a link is detected. An unlit LED means
no link is detected.
ACT LED on Individual Port Blinking amber means traffic is flowing. An unlit LED means no
traffic flowing.