Link Status Propagation Operational Characteristics - Alcatel-Lucent 9500 MXC User Manual

Link Status Propagation Operational Characteristics

3DB 23063 ADAA - Rev 004 July 2007
300 Mbps L1 Link Aggregation: Two 150 Mbps STNM1 Links
Figure 7-32.
INU
DAC GE C1 port 1
to link 1 port 1
DAC GE
300 Mbps
P1
C1
P2
P3
C2
P4
DAC GE C1 port 2
to link 2 port 1
Figure 7-32 illustrates L1 link aggregation. A 300 Mbps assignment on DAC GE
C1 is split between two 150 Mbps links, which may be operated (as shown) on
the same frequency channel using RAC 40s for CCDP XPIC operation.
L1 link aggregation for E1, DS1 or STM1/OC3 rates requires SW release 3.6 or
later.
Rapid Failure Detection and Protection must be selected as the Transport
Channel Mode on the DAC GEs.
This section describes the operational characteristics of Link Status Propagation,
and its application to DAC GE L2 link aggregation when the aggregated links are
supported on different DAC GEs / INUs.
Link Aggregation Applications
DAC GE link aggregation functionality uses port status to confirm the
operational status of the aggregated link. Refer to Figure 7-33.
• Link A, which hosts the aggregation function, requires knowledge of Link B
port status to confirm the operational status of Link B, the aggregated link.
• With link status propagation enabled on Link B, its operational status reflects
automatically via its port P1, to P1 on Link A.
• Link status propagation should not be enabled on Link A.
• Do not enable where you wish to retain service on one link if either link fails.
• If enabled, P2 on link A will shutdown if either link fails.
150 Mbps
RAC
150 Mbps
RAC
Backplane
bus
9500 MXC User Manual
Link 1
Link 2
Vol. IV-7-81