Why there is a problem when a single subnet is used in a partial
when a single IP subnet is used over a partial mesh FR topology the following occurs:
not all the hosts in the IP subnet can reach each other directly using a FR PVC (or it would be a full mesh).
This is quite a departure from how routing works normally: using a third device to reach a device in the same IP subnet is somewhat not expected.
This makes routing more difficult to implement, for example in the case of OSPF the choice of the DR becomes critical as only a device with direct connections to all other routers in subnet can do the job.
In real world a partial mesh can be mapped to a collection of point-to-point links each with its own IP subnet, making routing simpler with any routing protocol and specially with OSPF.
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Connectivity Design considerations and recommendation
1.Management Access connectivity
If there is a dedicated OOB management path, consider connecting to CIMC and MGMT port.
If OOB path is not available, Connect the dedicated Management port to LAN Swi...
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