Must all S series switches on an OSPF NBMA network be fully meshed

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Question: Must all devices on an OSPF NBMA network be fully meshed?

Answer: No, devices on an OSPF NBMA network do not need to be fully meshed. For S series switches supporting OSPF, routes between the DR, BDR, and IP addresses of neighbors must be reachable. If the DR is not determined, you can set the priority of a device to 0 and then the device cannot be the DR. To ensure network robustness, you are advised to build a full mesh NBMA network.

Other related questions:
Must all the devices on an OSPF NBMA network be fully meshed
All the devices on an OSPF Non-Boadcast Multi-Access (NBMA) network do not need to be fully meshed. Only the designated router (DR), backup designated router (BDR), and all the neighbors need to be reachable by IP address. Though DR election is not definite, you can set the priority of another device to 0 to prevent the interface from being elected as DR. For a robust network, it is recommended that all the devices on an NBMA network be fully meshed.

Can the OSPF network type be configured as P2P or NBMA
This configuration, however, is not recommended unless necessary or you are aware of the consequences of modifying the default network type. A beginner may believe that the broadcast and P2P networks in OSPF must also be broadcast or P2P at the link layer. Actually, the OSPF network type is independent of the physical media and link layer protocol.

Must two S series switches be on the same network segment to set up an OSPF neighbor relationship
Question: Must the interfaces on two ends of an OSPF link be on the same network segment and the mask digits on the neighboring interfaces be consistent? Answer: When two S series switches are establishing an OSPF neighbor relationship, the interfaces on the broadcast network, NBMA network, or P2MP network must be on the same network segment and the mask digits on the neighboring interfaces must be consistent. The limitations do not apply to interfaces on a P2P network. On an OSPF P2P network, if the link-layer protocol is PPP, OSPF neighbors with IP addresses on different network segments can be in the Full state and correctly calculate routes. However, if the link-layer protocol is not PPP (for example, HDLC), devices with IP addresses on different network segments cannot establish an OSPF neighbor relationship. Through PPP negotiation, the local device can obtain the IP address of the remote device and have a route to the remote device without extra configuration.

Do all Huawei APs support Mesh functions
Starting from V200R003C00, all Huawei APs support the Mesh function except the AD9430DN-24 (including the mapping RRUs), AD9430DN-12 (including the mapping RRUs), AP7030DE, AP9330DN, AP6310SN-GN, AP2030DN and AP2010DN.

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.

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