HP 6125G HP 6125G & 6125G/XG Blade Switches High Availability Configur - Page 23

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An MA serves a VLAN. Packets sent by the MPs in an MA carry the relevant VLAN tag. An MP can receive packets sent by other MPs in the same MA. The level of an MA equals the level of the MD that the MA belongs to. MP An MP is configured on a port and belongs to an MA. MPs include maintenance association end points (MEPs) and maintenance association intermediate points (MIPs). • MEPs MEPs define the boundary of the MA. Each MEP is identified by a MEP ID. The MA to which a MEP belongs defines the VLAN of packets sent by the MEP. The level of a MEP is equal to the level of the MD to which the MEP belongs, and the level of packets sent by a MEP equals the level of the MEP. The level of a MEP determines the levels of packets that the MEP can process. A MEP forwards packets at a higher level and processes packets of its own level or lower. The processing procedure is specific to packets in the same VLAN. Packets of different VLANs are independent. MEPs are either inward-facing or outward-facing. An outward-facing MEP sends packets to its host port. An inward-facing MEP does not send packets to its host port. Rather, it sends packets to other ports on the device. • MIP A MIP is internal to an MA. It cannot send CFD packets actively. However, a MIP can handle and respond to CFD packets. By cooperating with MEPs, a MIP can perform a function similar to ping and traceroute. A MIP forwards packets of a different level without any processing and only processes packet of its own level. The MA to which a MIP belongs defines the VLAN of packets that the MEP can receive. The level of a MIP is defined by its generation rule and the MD that the MIP belongs to. MIPs are generated on each port automatically according to related MIP generation rules. If a port has no MIP, the system will examine the MAs in each MD (from low to high levels), and follow the procedure as described in Figure 4 to determine whether to create MIPs at the relevant level. Figure 4 Procedure of creating MIPs Figure 5 demonstrates a grading example of the CFD module. Four levels of MDs (0, 2, 3, and 5) are designed. The bigger the number, the higher the level, and the larger the area covered. MPs are 16

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16
An MA serves a VLAN. Packets sent by the MPs in an MA carry the relevant VLAN tag. An MP can
receive packets sent by other MPs in the same MA. The level of an MA equals the level of the MD that the
MA belongs to.
MP
An MP is configured on a port and belongs to an MA. MPs include maintenance association end points
(MEPs) and maintenance association intermediate points (MIPs).
•
MEPs
MEPs define the boundary of the MA. Each MEP is identified by a MEP ID.
The MA to which a MEP belongs defines the VLAN of packets sent by the MEP. The level of a MEP
is equal to the level of the MD to which the MEP belongs, and the level of packets sent by a MEP
equals the level of the MEP. The level of a MEP determines the levels of packets that the MEP can
process. A MEP forwards packets at a higher level and processes packets of its own level or lower.
The processing procedure is specific to packets in the same VLAN. Packets of different VLANs are
independent.
MEPs are either inward-facing or outward-facing. An outward-facing MEP sends packets to its host
port. An inward-facing MEP does not send packets to its host port. Rather, it sends packets to other
ports on the device.
•
MIP
A MIP is internal to an MA. It cannot send CFD packets actively. However, a MIP can handle and
respond to CFD packets. By cooperating with MEPs, a MIP can perform a function similar to ping
and traceroute. A MIP forwards packets of a different level without any processing and only
processes packet of its own level.
The MA to which a MIP belongs defines the VLAN of packets that the MEP can receive. The level
of a MIP is defined by its generation rule and the MD that the MIP belongs to. MIPs are generated
on each port automatically according to related MIP generation rules. If a port has no MIP, the
system will examine the MAs in each MD (from low to high levels), and follow the procedure as
described in
Figure 4
to determine whether to create MIPs at the relevant level.
Figure 4
Procedure of creating MIPs
Figure 5
demonstrates a grading example of the CFD module. Four levels of MDs (0, 2, 3, and 5) are
designed. The bigger the number, the higher the level, and the larger the area covered. MPs are