We have three sites on our company. There are Core switch(65xx)+ several L2 switches (37xx) in every site. we used to use management vlan (not Vlan1) on all devices. But we want to use loopback address for management again.My question are:
1.Do we need setup loopback address in our situation because SVI (management vlan)was already here? Both loopback and SVI are virtual address in case the physical address is down
2.I check the previous topic in this forum.Some guys recommend that L2 switch does not need it (use SVI), but L3 switch need it. But actually in our L3 core switch, we use SVI instead of physical IP address.
3.If you think all devices need loopback.How to choose the IP address scale? Do we need use submask as 32 for every devices because I only know it could save address space instead of 24 bit submask? But we use the private address in our environment.
We could use lots of address space for that. we also do not setup static route for every L2 switch if we choose 24 bit submask.
Please advice! Thank you very much.