VSC7440 datasheet(115/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

MPLS_OAM_TYPE

When either MIP or MEP OAM detection is enabled

(MPLS_MIP_ENA or MPLS_MEP_ENA), MPLS_OAM_TYPE

configures in which control channel to look for OAM.

For FWD_TYPE = 1 (TERMINATE_PW), MPLS_OAM_TYPE

configures which Control Channel Type is used for forwarding

PW OAM:

1: Detect Vccv1 OAM

2: Detect Vccv2 OAM

3: Detect Vccv3 OAM

4: Detect Vccv4 OAM

For FWD_TYPE = 3 (LSP_POP), MPLS_OAM_TYPE configures

which Control Channel Type is used for LSP OAM:

5: LSP OAM under GAL found at pos NUM_VLD_LABELS + 1

6: LSP OAM under GAL found at pos NUM_VLD_LABELS

For FWD_TYPE = 4 (CTRL_PDU), MPLS_OAM_TYPE

configures directly the control type and PDU position (with

OAM_Y1731_SEL and NXT_NORM_W16_OFFSET/

NXT_NORM_W32_OFFSET) and bypasses post-processing:

1: OAM_Y1731

2: OAM_MPLS_TP

3: PTP

4: IP4_UDP_PTP

5: IP6_UDP_PTP

6: Reserved

7: SAM_SEQ

3x x

MPLS_MEP_ENA

Enables detection of MPLS MEP. If enabled and if frame is not

selected for MIP extraction, it is determined whether it is a valid

frame OAM PDU according to the MPLS_OAM_TYPE.

1x x

MPLS_MIP_ENA

Enables detection of MPLS MIP. If enabled, the iTTL will be

checked for expiry. In case of iTTL expiry, the frame is checked if

it is a valid OAM PDU according to the MPLS_OAM_TYPE.

1x x

MPLS_OAM_FLAVOR

If OAM detection is enabled, this setting determines if the G-

ACH/ACH selected by MPLS_OAM_TYPE is checked for

Channel Type = 0x8902.

This configuration applies only to MEP OAM detection. OAM MIP

detection is extracted to SW based on from the configured

Control Channel Type, regardless of the channel type, because

all OAM MIP processing is done in software.

0: G8113_2 (BFD, and so on).

1: G8113_1 (BHH).

1x x

MPLS_IP_CTRL_ENA

Enables IP directly under MPLS based on IP profiles.

x x

Table 65 •

VCAP CLM Actions (continued)

Field Name

Description and Encoding

Size

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