Relationship among the media type, link type, and network type of OSPF on S series switches

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Question: What are OSPF media type, link type, and network type? What is the relationship among them?
Answer: OSPF media type, link type, and network type are described as follows:
Media type: indicates types of physical links, including GigabitEthernet and Ethernet links.
Link type (in LSAs): The link type in an LSA is set based on the ospf network-type setting, as defined in RFC 2328.
On a point-to-point (P2P) network, the link type is point-to-point.
If a device is connected to a transmission network, the link type is transit.
If a device is connected to a stub network, the link type is stub.
If a device is connected to a virtual link, the link type is virtual.
Network type: The OSPF network type can be configured as required regardless of physical media.
Currently, OSPF network types include P2P, broadcast, NBMA, and P2MP.
Relationship among the media type, link type, and network type: The default OSPF network type depends on the media type, and the OSPF network type determines the link type in an LSA.

Other related questions:
Can an OSPF neighbor relationship be established if the network types of the two S series switches are different
Question: Can a Full neighbor relationship be established if the network types of the two ends of an OSPF link are different? Answer: Yes. For example, two devices are interconnected through an Ethernet link. On one end of the link, the default broadcast network type is adopted. The other end is configured as OSPF peer-to-peer (P2P). Neighbor relationship can be established between these two devices, which reach the Full state by exchanging their Link State Databases (LSDBs). However, no route can be learned because OSPF devices need LSDBs to construct a Shortest Path Tree (SPT). The LSDBs, however, are problematic. That is, the link-state advertisements (LSAs) generated by one end consider the peer a broadcast neighbor, while the other end considers its peer a P2P neighbor. Therefore, no SPT can be constructed correctly and the Shortest Path First (SPF) algorithm cannot calculate the right routes either.

Commands for checking OSPF network type faults on S series switches
You can run the following commands on an S series switch supporting OSPF to check information about OSPF network type faults: display ospf interface The command output displays information about an OSPF interface. ospf network-type This command is used to set the network type of an OSPF interface.

Common LSA types defined by OSPF of S series switches
Question: What are the common LSAs used in OSPF of S series switches? Why Type 6 LSAs do not exist? Answer: On S series switches supporting OSPF, OSPF uses the following types of LSAs: Type 1 LSA: router LSA Type 2 LSA: network LSA Type 3 LSA: summary LSA Type 4 LSA: ASBR-summary LSA Type 5 LSA: AS-external-LSA Type 7 LSA: NSSA AS-external-LSA OSPF packets were encoded based on Type-Length-Value (TLV). To enable other OSPF functions, you need to use LSAs of other types. Type 6 LSAs, indicating group-membership-LSAs, are used to identify multicast group members in Multicast Open Shortest Path First (MOSPF). Switches do not support Type 6 LSAs. Type 8 LSAs, indicating external-attributes-LSAs, are used to import BGP routes into OSPF processes for inter-operations and reserve information about BGP routes such as AS-Path. Switches do not support Type 8 LSAs. The Opaque LSA type is defined by RFC 2370 and can use the TLV structure. Applications such as OSPF Traffic Engineering (TE) are implemented by the Opaque LSA. The Type 9 LSA is the Opaque LSA flooding on a link. The Type 10 LSA is the Opaque LSA flooding within an area. The Type 11 LSA is the Opaque LSA flooding within an AS.

What Is the Relationship Between the AZ Type and Cloud Host Type
【Product�? ManageOne ServiceCenter 【Version�? 3.X 【Question�? What is the relationship between the AZ type and cloud host type? 【Answer�? If the AZ type of the cloud resource pool is VMware, only common cloud hosts can be applied for on ServiceCenter. If the AZ type of the cloud resource pool is FusionCompute, only Huawei cloud hosts can be applied for on ServiceCenter. If the AZ type of the cloud resource pool is KVM, both Huawei cloud hosts or common cloud hosts can be applied for on ServiceCenter. ----End

MPU types on S series modular switches
Different S series switches have different MPUs: S9303: LE0MMCUA and LE0DMCUA S9306&S9312: LE0MSRUA, LE0DSRUA, LE0D00SRUB00, LE1D2SRUE000, and LE1D2SRUH000 S9310: LE1D2SRUKC00 S7703: ES0D00MCUA00 and ES1D2MCUAC00 S7706&S7712: ES0D00SRUA00, ES1D2SRUAC00, ES0D00SRUB00, ES1D2SRUE000, and ES1D2SRUH000 S9703: EH1D2MCUAC00 S9706&S9712: EH1D2SRUDC00, EH1D2SRUC000, and EH1D2SRUDC01 S12704&S12708&S12712: ET1D2MPUA000 S12710: ET1D2MPUBC00

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