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MS-PW OAM - draft-dong-pwe3-mspw-oam-01.txt

MS-PW OAM - draft-dong-pwe3-mspw-oam-01.txt. Jixiong Dong dongjixiong@huawei.com Presented by Yang Yang. Requirements of MS-PW OAM. From “Requirements for inter domain Pseudo-Wires”(draft-martini-pwe3-mh-pw-requirements-01.txt):

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MS-PW OAM - draft-dong-pwe3-mspw-oam-01.txt

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  1. MS-PW OAM - draft-dong-pwe3-mspw-oam-01.txt Jixiong Dong dongjixiong@huawei.com Presented by Yang Yang

  2. Requirements of MS-PW OAM From “Requirements for inter domain Pseudo-Wires”(draft-martini-pwe3-mh-pw-requirements-01.txt): In-band monitoring SHOULD be provided both end-to-end across the MS-PW, and on a segment (i.e. SS-PW) basis. The MS-PW SHOULD support a Forward Defect Indicator (FDI). All PE routers along the MS-PW MUST agree on a common PW OAM mechanism to use to the MS-PW. The S-PE should be able to behave as a segment endpoint for PW OAM mechanisms. The S-PE MUST be able to pass U-PE to U-PE PW OAM messages transparently.

  3. E2E/SEG OAM scheme PW SEG2 PE2 PW SEG1 PE1 S-PE Two Level OAM PE2 PE1 S-PE SEG2 OAM SEG1 OAM E2E OAM

  4. FDI scheme PE2 PE2 PE1 S-PE1 PE1 S-PE1 S-PE2 S-PE2 ① FDI ② RDI ② PW status TLV

  5. OAM capability indication Total Seven OAM capability: 0x01 ICMP Ping (predefined in [VCCV]) 0x02 LSP Ping (predefined in [VCCV]) 0x04 BFD for PW Fault Detection only (predefined in [VCCV]) 0x08 BFD for PW Fault Detection and AC/PW Fault Status Signaling (predefined in [VCCV]) 0x10 FDI 0x20 SEG OAM 0x40 E2E OAM Problems: The length of CV type field is 8 bit, which limit the number of OAM capability indication.

  6. Distinguishing of E2E OAMand SEG OAM Inband VCCV Extension T: Indicates the segment type of OAM packet. T = 0 indicates it is SEG OAM packet. T = 1 indicates it is E2E OAM packet. F: Indicates the FDI type of OAM packet. F = 0 indicates it is not a FDI packet. F = 1 indicates it is a FDI packet.

  7. Next step RDI (Remote Defect Indication) PW mismatch

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