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Cisco ONS 15310-CL, ONS 15310-MA, and ONS 15310-MA SDH Ethernet Card Software Feature and Configuration Guide, R9.1 and R9.2
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Chapter 17 CE-Series Ethernet Cards
CE-MR-6 Ethernet Card
SONET synchronous transport signal (STS). When the payload reaches the destination node, the process
is reversed and the data is transmitted from the 10/100/1000 Mbps Ethernet ports in the destination
CE-MR-6 card onto the Ethernet cable and data network. The POS p rocess is covered in detail in
Chapter 6, “Configuring POS on the ML-Series Card.”
The CE-MR-6 card supports ITU-T G.707-based standards. It allows a soft reset, which is errorless in
most cases. During the soft reset, if there is a provisioning change, or if the firmware is replaced during
a software upgrade process, the reset is equivalent to a hard reset. For more information on a soft reset
of a CE-MR-6 card using Cisco Transport Controller (CTC), refer to the
Cisco ONS 15310 Procedure Guide.
CE-MR-6 Ethernet Features
The Ethernet interface of the CE-MR-6 card comprises six front-end Small Form-factor Pluggable (SFP)
slots. For each slot, the interface speed and media type is determined by the installed SFP module. The
SFP slots support 10 Mbps, 100 Mbps, and 1000 Mbps (Gigabit Ethernet) operation. The SFP modules
supporting the intended rate can be copper (10/100/1000 Mbps) or optical (100/1000 Mbps). SFP
modules are offered as separate orderable products for flexibility. For SFP details, refer to the
Cisco ONS 15310 Reference Manual or Installing the GBIC, SFP, SFP+, XFP, CXP, and CFP Optical
Modules in Cisco ONS Platforms. Ethernet Ports 1 through 6 each map to a POS port with a
corresponding number. The console port on the CE-MR-6 card is not functional.
The CE-MR-6 card forwards valid Ethernet frames without modifying it over the SONET network.
Information in the headers is not affected by encapsulation and transport. IEEE 802.1Q information
travels through the process unaffected.
The CE-MR-6 supports jumbo frames with MTU sizes of 64 to 9600 bytes.
The CE-MR-6 card discards certain types of erroneous E thernet frames rather than transport them over
SONET. Erroneous Ethernet frames include corrupted frames with CRC errors and undersized frames
that do not conform to the minimum 64-byte length, or oversized frames greater th an 9600 bytes Ethernet
standard.
Note Many Ethernet attributes are also available through the network element (NE) defaults feature. For more
information on NE defaults, refer to the “Network Element Defaults” appendix in the Cisco ONS 15310
Reference Manual.

Autonegotiation, Flow Control, and Frame Buffering

On the CE-MR-6 card, Ethernet link auto negotiation is on by default when the duplex or speed of the
port is set to auto. The user can also set the link spe ed, duplex, selective auto negotiation, and flow
control manually under the card-level Provisioning tab in CTC.
The CE-MR-6 card supports selective auto negotiation on the Ethernet ports. If selective auto
negotiation is enabled, the port attempts to auto negotiate only to a specific speed and duplex. Th e link
will come up if both the speed and duplex of the attache d auto negotiating device matches that of the
port. You cannot enable selective auto negotiation if either the speed or duplex of the port is set to auto.
The CE-MR-6 card supports IEEE 802.3x flow control and frame buffering to reduce data traffic
congestion. Flow control is on by default.