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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
78-19415-01
Chapter 17 CE-Series Ethernet Cards
CE-MR-6 Ethernet Card
On the CE-MR-6 card, members of a HW-LCAS circuit must be moved to the OOS,OOG (locked,
outOfGroup) state before:
•
Creating or deleting HW-LCAS circuits.
•
Adding or deleting HW-LCAS circuit members.
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Changing the state to OOS,DSBLD.
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Changing the state from OOS,DSBLD to any other state.
A traffic hit is seen under the following conditions:
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A hard reset of the card containing the trunk port.
•
Trunk port moved to OOS,DSBLD(locked,disabled) state.
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Trunk fiber pull.
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Deletion of members of the HW-LCAS circuit in IG (In Group) state.
Note
CE-MR-6 cards display symmetric bandwidth behavior when an AIS, UNEQ, LOP, SF, SD, PLM,
ENCAP, OOF, or PDI alarm is raised at the near-end member of the HW-LCAS circuit. The
LCAS-SINK-DNU alarm and the RDI condition are raised at the far-end member of the circuit. The
LCAS-SINK-DNU alarm changes the member state to outOfGroup (OOG) and hence, the traffic goes
down in both directions. For more information about alarms, refer to the “Alarm Troubleshooting”
chapter in the Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide or the
Cisco ONS 15310-MA SDH Troubleshooting Guide.
Caution
Packet losses might occur when an optical fiber is reinserted or when a defect is cleared on members of
the HW-LCAS split fiber routed circuits.
CE-MR-6 POS Encapsulation, Framing, and CRC
The CE-MR-6 card uses Cisco EoS LEX (LEX). LEX is the primary encapsulation of ONS Ethernet
cards. In this encapsulation, the protocol field is set to the values specified in Internet Engineering Task
Force (IETF) Request For Comments (RFC) 1841. The user can provision frame-mapped generic
framing procedure (GFP-F) framing (default) or HDLC framing. With GFP-F framing, the user can also
configure a 32-bit CRC (the default) or no CRC (none). When LEX is used over GFP-F it is standard
Mapped Ethernet over GFP-F according to ITU-T G.7041. HDLC framing provides a set 32-bit CRC.
For more details about the interoperability of ONS Ethernet cards, including information on
encapsulation, framing, and CRC, see the Chapter 6, “Configuring POS on the ML-Series Card.”
The CE-MR-6 card supports GFP-F null mode. GFP-F CMFs are counted and discarded.
CE-MR-6 Loopback, J1 Path Trace, and SONET Alarms
The CE-MR-6 card supports terminal and facility loopbacks. It also reports SONET alarms and transmits
and monitors the J1 Path Trace byte in the same manner as OC-N cards. Support for path termination
functions includes:
•
H1 and H2 concatenation indication
•
C2 signal label
•
Bit interleaved parity 3 (BIP-3) generation