Data Sheet
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SONET/SDH Features and Functions Ethernet WAN Interface Comments
Virtual Tributary (VT) Not supported Only single Ethernet channel is supported
(VLANs are supported)
Framing Supported
Section, Line, and Path BIP8 Supported Errors are detected and counted
Section and Path Trace Supported 16-byte messages (16 hardware registers to
send and receive trace messages); automatic
trace mismatch is not supported
Pointer operation/action Supported H1, H2 are used to get the location of SPE
Defects or anomalies – Unequipped payload
(UNEQ-P), Path trace identifier mismatch (TIM-
P), all Virtual tributary (VT) -related defects or
anomalies
Not supported
Defects or anomalies – LOS, SEF, LOF, S-BIP,
L-BIP, AIS-L, RDI-L, AIS-P, LOP-P, P-BIP,
PLM-P
Supported Counters for section, line, and path BIP errors
Table 4. Feature and Application Comparison Between 10 Gigabit Ethernet Interfaces
Feature/Application 10 GE LAN Mode 10 GE WAN Mode SONET/SDH
Maximum data rate 10 Gbps 9.2946 Gbps 9.584646 Gbps
Fault Detection and Diagnostics
Link availability Link detect (up/down) Loss of signal, signal fail Loss of signal, signal fail
Link quality or faulty TX/RX Encoding error, runt, jabber,
CRC
Both GE LAN and SONET
capabilities
B1, B2, B3, far end block
error (FEBE)/remote error
indication (REI)
Remote alarm/defect Remote fault/ local fault and
keep alive
Remote fault/local fault and
alarm indication signal (AIS),
remote defect indication (RDI)
AIS, RDI
Summary (fault detection and
diagnostics)
10 GE WAN has same or more diagnostics capability as SONET; 10 GE LAN has less
diagnostics capabilities
Fault protection/ redundancy Done by link aggregation
(802.1 ad)
Done by link aggregation
(802.1 ad)
Automatic protections
switching (APS) (linear)
Channel multiplexing (multiple
low-speed channels)
Via VLAN best effort traffic
(requires policer, shaper for
QoS)
Via VLAN best effort traffic
(requires policer, shaper for
QoS)
TDM multiplexing with
guaranteed bandwidth
Applications
Back-to-back connection over
dark fiber
Yes Yes Yes
DWDM with SONET interface No Yes (may get relatively higher
pointer adjustments)
Yes
DWDM with 10 GE LAN
interface
Yes No No
Direct connection to ADM No Yes – conditional (could have
relatively higher pointer
adjustment, network
management software should
be able to handle these)
Yes
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