DCFM Enterprise User Manual (53-1001775-01, June 2010)

DCFM Enterprise User Manual 55

53-1001775-01

Seed switch failover

• 140-Port Director

• 256-Port Director

The following M-EOS devices are seed switch-capable; however, they do not obtain fabric

member information:

• 16-Port, 1 Gbps and 2 Gbps Switch

• 32-Port, 1 Gbps and 2 Gbps Switch

• 24-Port, 2 Gbps Switch

• 64-Port Director

Seed switch failover

The Management application collects fabric-wide data (such as, fabric membership, connectivity,

name server information, zoning, and so on) using the seed switch. Therefore when a seed switch

becomes unreachable or there is no valid seed switch, the fabric becomes unmanageable.

When the seed switch cannot be reached for three consecutive fabric refresh cycles, the

Management application looks for another valid seed switch in the fabric, verifies that it can be

reached, and has valid credentials. If the seed switch meets this criteria, the Management

application automatically fails over to the recommended seed switch.

Note that it is possible that auto-failover may occur to a seed switch not running the latest firmware

version. In this instance, any functionality which has a direct dependency on the firmware version

of the seed switch is affected and restricted by the failover seed switch capabilities.

Seed switch failover to a M-EOS switch is supported in a Mixed fabric with following restrictions:

• In Interop Mode 2 Fabrics, Defined Zone information is lost and the Management application

cannot push the defined zone configuration to the switch because the M-EOS device is a seed

switch.

• Dynamic updates do not occur when an end device is connected or removed from Fabric OS

switch. Updates only occur during the asset polling cycle. The asset polling cycle defaults are

baed on SAN size (Small – 2 minutes, Medium – 15 minutes, Large – 30 minutes).

• If the firmware version is M-EOS 9.9.2 or later, discovery obtains all fabric member information

for all fabric members. Fabric member information includes Domain ID, WWN, IP address (IPv4

and IPv6), Firmware Version, Model, and Vendor Name. The following M-EOS devices are both

seed switch-capable and allow fabric member information collection:

• 32-Port, 4 Gbps Switch

• 16-Port, 4 Gbps Switch