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US 8,804,534 B2Granted
Interworking between MPLS/IP and Ethernet OAM mechanisms
AssigneeCisco Technology, Inc.
InventorsSamer M. Salam, Thomas D. Nadeau, Luca Martini, Ali Sajassi
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Abstract
In one embodiment, a method includes receiving, by a provider edge (PE) device, a transport layer status message indicative of a defect on a pseudowire (PW) running across a core of a service provider (SP) network. The status message is translated to a service layer message indicative of the defect. The service layer message is then transmitted across an access domain of the SP network.
Claims19
A method comprising:
- receiving, by a provider edge (PE) device, a transport layer status message indicative of a defect on a pseudowire (PW) running across a Multi-Protocol Label Switching/Internet Protocol (MPLS/IP) core of a service provider (SP) network;
- identifying the defect at least in part by examining the transport layer status message;
- selecting, based at least in part on the defect, a service layer message indicative of the defect, the service layer message comprising an Ethernet Operations Administration, and Maintenance (OAM) message;
- and
- sending, by the PE device, the service layer message to a customer edge (CE) device over an Ethernet access domain of the SP network.
2 more elements
A method comprising:
- detecting, by a provider edge (PE) device, a Connectivity Fault Management (CFM) Alarm Indication Signal (AIS) message on an attachment circuit of an Ethernet access domain of a Service Provider (SP) network using a native Ethernet Operations, Administration, and Maintenance (OAM) mechanism;
- the CFM AIS message being indicative of a local defect;
- identifying the local defect at least in part by examining the CFM AIS message;
- selecting, based at least in part on the local defect, a transport layer pseudowire (PW) status message indicative of the local defect, the transport layer PW status message comprising a Label Distribution Protocol (LDP) status message;
- and
- sending, by the PE device, the LDP status message to a remote PE device over a Multi-protocol Label Switching (MPLS) control channel of the SP network.
3 more elements
An apparatus comprising:
- a first port to receive a Connectivity Fault Management (CFM) Alarm Indication Signal (AIS) message indicative of a fault on an attachment circuit in an Ethernet access domain of a service provider (SP) network;
- a second port for connection to a Multi-Protocol Label Switching/Internet Protocol (MPLS/IP) core of the SP network;
- and
- at least one processor operable to:
- identify the fault at least in part by examining the CFM AIS message;
- generate, based at least in part on the fault, a Label Distribution Protocol (LDP) pseudowire (PW) status message indicative of the fault;
- send the LDP PW status message via the second port to a remote peer device responsive to receiving the CFM AIS message;
- generate an Ethernet CFM Remote Defect Indicator (RDI) message responsive to a different LDP pseudowire (PW) status message indicative of a defect received at the second port;
- and
- transmit the Ethernet CFM RDI message across the Ethernet access domain.
7 more elements
An apparatus comprising:
- a first port to receive a pseudowire (PW) transport layer status message transmitted over a Multi-Protocol Label Switching/Internet Protocol (MPLS/IP) core of a service provider (SP) network, the PW transport layer status message being indicative of a remote defect;
- at least one processor operable to:
- identify the remote defect at least in part by examining the PW transport layer status message;
- generate, based at least in part on the remote defect, an Ethernet Operations, Administration, and Maintenance (OAM) service layer message;
- and
- transmit the Ethernet OAM service layer message across an Ethernet access domain;
- a second port to receive an Ethernet OAM service layer message indicative of a local defect in the Ethernet access domain of the SP network;
- and
- wherein the at least one processor is further operable to:
- identify the local defect at least in part by examining the PW Ethernet OAM service layer message;
- generate, based at least in part on the local defect, a Label Distribution Protocol (LDP) status message;
- and
- transmit the LDP status message to a remote peer over the MPLS/IP core.
10 more elements
Dependencies are inferred from the claim text.