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Alcatel-Lucent IP/MPLS Mobile Backhaul Transport Questions 56–60 (page: 13)

Updated On: 9-Feb-2026

Which statement correctly describes bi-directional Automatic Protection Switching (APS) as implemented in SROS?

  1. The endpoints transmit the same data on the working and protect circuits
  2. The endpoints send K2 keepalive bits on the working and protect circuits
  3. A failure on the receive path causes both paths to switch to the protect circuit
  4. Either the working or protection circuit can signal an APS switch

Answer(s): C



Click on the exhibit



Given the diagram shown, and the following information:
· Configured on CSA1 is a redundant ePipe service
· A Multichassis-Link Aggregation Group (MC-LAG) protects the CE access links · The preferred spoke SDP has failed
After the failure, which status will the MLS2 router signal to CSA 1 on its return spoke SDP 2:1?

  1. Pseudowire forwarding, 0x00
  2. Remote pseudowire active, remote SAP is down, 0x06
  3. Pseudowire forwarding standby, 0x20
  4. Remote pseudowire in standby, remote SAP is down, 0x26

Answer(s): D



Click on the exhibit



Given the diagram and the following information:
· Virtual Private Routed Network (VPRN) 5 spans the routers Point of Concentration (POC) 3-1 and 3- 2 and the Multilevel Switch (MLS) routers MLS1 and MLS2 · Multiprotocol Border Gateway Protocol (MP-BGP) is configured and operational · Pseudowire status is signaled, as shown, on the ePipe/VPRN spoke Service Distribution Points (SDPs)
In the exhibit, how does the signaled pseudowire status affect the VPRN 5 service?

  1. The spoke SDP 1:50 status 0x00 keeps the POC3-1 VPRN interface "to NodeB" operationally down
  2. The spoke SDP 2:50 status 0x20 holds down the POC3-2 static routes until SDP 2 recovers
  3. MLS1 and MLS2 route traffic targeting the NodeB loopback interface through router POC3-1
  4. MLS1 and MLS2 route traffic targeting the NodeB loopback interface through router POC3-2

Answer(s): C



Click on the exhibit



Given the show command and the result shown:
Which payload type does this service transport?

  1. A channelized E1 circuit carrying all 32 timeslots
  2. An unframed DSI circuit carrying all 24 timeslots
  3. Multilink Protocol (MP) framed bundled E1s
  4. Ethernet over TDM framed DS1 circuits

Answer(s): B



Click on the exhibit



Given the diagram shown, and the following information:
· Configured on CSA1 is a redundant ePipe service
· A Multichassis-Link Aggregation Group (MC-LAG) protects the CE access links

·The active MC-LAG has switched to MLS2
Which status does MLS1 signal to CSA1 on its return spoke SDP 1:1?

  1. Pseudowire forwarding, 0x00
  2. Remote pseudowire active, remote SAP is down, 0x06
  3. Pseudowire forwarding standby, 0x20
  4. Remote pseudowire in standby, remote SAP is down, 0x26

Answer(s): D



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