- In a mesh topology, each switch is directly connected to other switches by using ISL'S. This topology promotes enhanced connectivity within SAN. When the number of ports on a network the number of nodes that can participate & communicate also increases.
There are two types of mesh topology
a) Full mesh & b) Partial mesh
In a full mesh, every switch is connected to every other switch in the topology.
Full mesh topology may be appropriate when the number of switches involved in are small.
A typical deployment would involve up to four switches or directors, with each of them serving highly localized host to storage traffic.
In a full mesh topology, a maximum of one ISL or hop is required for host to storage traffic.
In a partial mesh topology, several hops or ISL'S may be required for the traffic to reach its destination.
Hosts & storage can be located anywhere in the fabric, & storage can be localized to a director or a switch in both mesh topologies
Thus for high availability solution, full mesh topology is used.
In mesh one ISL (Inter sochet link) for each host to strage.
17 X 16 = 272 ports
Total ports available = 17 X 16 = 272
So ISL required are 136 i.e 272/2
- Each ISL require / consume two ports availabe ports 272 ports.
Thus 'zero' / '0' number of ports available for hosts.
free ports = total port - (total switch - ISL)
= 16-(17-1) = 0