Alcatel-Lucent 7705 - Fan Module; Storage; Compliance

Services Overview
7705 SAR OS Services Guide Page 77
In the example shown in Figure 15, separate dot1ag instances initiated on the 9500 MPR
nodes can be used to ensure Ethernet layer connectivity on a per-base-station basis. All the
traffic from these base stations is aggregated and switched to a single port on the 7705 SAR.
Each base station is recognized through a different VLAN, where the VLANs are bound to
different services. CFM with traffic in the Down MEP OAMPDU direction at the Ethernet
SAP offers the flexibility to run OAM tests on a per-base-station basis.
802.1ag MEP Support on Ethernet Spoke SDPs
The 7705 SAR supports down maintenance association endpoints (MEPs) on Ethernet spoke
SDP endpoints. Figure 16 illustrates a Down MEP on an Ethernet spoke SDP.
CFM messages can be generated and switched across an Ethernet PW. CFM messages that
are received and have an MD that matches the value configured on the 7705 SAR are
extracted and processed. Any received CFM messages with an MD level that does not match
the configured value are not terminated and are switched transparently to the Ethernet SAP.
Down MEPs on Ethernet spoke SDPs on the 7705 SAR support the following:
• termination of the CFM messages destined for the MEP-ID of the 7705 SAR
• termination of CFM messages at the user-configured domain only
• discarding of OAMPDUs at a lower MD level than the configured one (an alarm
message is raised)
Figure 15: Down MEP at Ethernet SAP
MPLS Network
20475
Eth.
7705 SAR
BSC
7750 SR
Ethernet MW Network
Eth.
Eth.
Eth.
Eth.
9500 MPR
9500 MPR 9500 MPR 9500 MPR
T1, ATM, or
Eth. over
Eth. MW
9500 MPR