Cisco MDS-9124 Troubleshooting Guide - Page 138

Overview Chapter 5 Troubleshooting Mixed Generation Hardware Send documentation comments to [email protected] Table 5-5 Bandwidth Reserved for Shared Mode Module Type 24-port 4-Gbps 48-port 4-Gbps Port Speed Auto / 4 Gbps Auto max 2000 / 2 Gbps 1 Gbps Auto / 4 Gbps Auto max 2000 / 2 Gbps 1 Gbps Bandwidth Reserved 1 Gbps 0.5 Gbps 0.25 Gbps 0.8 Gbps 0.4 Gbps 0.2 Gbps Tip When migrating a host only supporting up to 2-Gbps traffic to the 4-Gbps switching modules, use autosensing with 2-Gbps maximum bandwidth. Note The 4-port 10-Gbps switching module only supports 10-Gbps links. Out-of-Service Interfaces You can take interfaces out of service to release shared resources that are needed for dedicated bandwidth. This feature is especially useful for the 48-port 4-Gbps switching modules. When an interface is taken out of service, all shared resources are released and made available to the other interface in the port group or module. Caution If you need to bring an interface back into service, you might disrupt traffic if you need to release shared resources from other interfaces. Port Index Availability Each chassis in the Cisco MDS 9000 Series has a hardware-based maximum port availability based on internally assigned port indexes. When the maximum number of port indexes is reached in a chassis, any modules remaining or added to the chassis will not boot up. The number of physical ports on a Fibre Channel module is equal to its number of port indexes. However, for Gigabit Ethernet modules (IPS-8, IPS-4, and MPS-14/2), one physical port is equal to four port indexes (one port index for iSCSI and three port indexes for FC IP tunnels). Table 5-6 lists the physical ports and port indexes (virtual ports) allocated per Cisco MDS 9000 module. Table 5-6 Port Index Allocation Module 48-port 4-Gbps Fibre Channel switching module 24-port 4-Gbps Fibre Channel switching module Physical Ports 48 24 Port Indexes Allocated 48 24 Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x 5-4 OL-9285-05