Cisco 15327 - Manual (Page 340)

20-8
Ethernet Card Software Feature and Configuration Guide, R7.2
Chapter 20 POS on ONS Ethernet Cards
ONS 15327 E-10/100-4 Framing and Encapsulation Options
ONS 15327 E-10/100-4 Framing and Encapsulation Options
For Software Release 5.0 and later, the E-10/100-4 card on the ONS 15327, configured in port-mapped
mode, offers the choice of configuring LEX or the original proprietary E-Series encapsulation. When
configured for LEX encapsulation, the ONS 15327 E-Series card interoperates with ML-Series cards.
When the E-10/100-4 is configured in EtherSwitch mode, it is restricted to the original proprietary
E-Series encapsulation. The E-Series card on the ONS 15327 is restricted to a 16-bit CRC.
Figure 20-7
illustrates ONS 15327 E-Series framing and encapsulation.
Refer to the ONS 15327 Procedure Guide for port provisioning procedures.
Figure 20-7 ONS 15327 E-Series Encapsulation and Framing Options
ONS 15454 and ONS 15454 SDH E-Series Framing and Encapsulation Options
LEX is not available on the ONS 15454 or ONS 15454 SDH E-Series cards. These cards are limited to
the original proprietary E-Series encapsulation, which does not allow POS interoperability with
non E-Series cards.
Figure 20-8 illustrates ONS 15454 and ONS 15454 SDH E-Series framing and
encapsulation.
SONET/SDH Frame
SONET/SDH Payload Envelope Transport Overhead
LEX
HDLC Framing
Flag Address Control Protocol Payload FCS
Encapsulation
Proprietary E-Series
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