Cisco Cisco MGX-FRSM-HS2 B Serial Frame Service Module Guía De Instalación
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Cisco Prime Network Analysis Module Catalyst 6500 Series Switch Installation and Configuration Guide
OL-24434-02
Installing and Configuring External Storage
Figure 2
External Storage Setup
See the following sections:
•
•
Preparing External SAS Storage
Configure The Storage Array
Reference the vendor’s user guide for proper configuration of the array. The NAM-3 is independent of
most array settings, but some are important for accessibility and performance.
most array settings, but some are important for accessibility and performance.
When configuring the Logical Unit Numbers (LUNs) on the array, there is often a “Segment Size”
setting. Larger segment sizes can improve write speeds. It is recommended to use a segment size as large
as possible, up to 512KB. Multiple LUNs can be configured on a single array. The NAM-3 supports up
to 24 LUNs between the SAS and FCoE ports combined.
setting. Larger segment sizes can improve write speeds. It is recommended to use a segment size as large
as possible, up to 512KB. Multiple LUNs can be configured on a single array. The NAM-3 supports up
to 24 LUNs between the SAS and FCoE ports combined.
It is very important to map the NAM-3 SAS address to the LUNs. Most storage arrays require this for
security reasons, ensuring that only certain hosts (for example, a NAM) can access the LUNs. Each NAM
has a unique SAS address, so this step must be performed for each NAM that requires access and for
each LUN that is to be accessed.
security reasons, ensuring that only certain hosts (for example, a NAM) can access the LUNs. Each NAM
has a unique SAS address, so this step must be performed for each NAM that requires access and for
each LUN that is to be accessed.
The NAM SAS address can be found using the CLI command
remote-storage sas local-address
.
Many storage arrays will automatically detect the SAS address once connected to the NAM.
root@nam.domain# remote-storage sas local-address
Local SAS Address: 5003223-0-0000-0000
Some SAS storage arrays do not properly negotiate the SAS base address of the front panel port. The
port is a “wide port” because it consists of four SAS lanes. Each lane has its own SAS address, and any
one of the four addresses can be considered the base address for the wide port. To safely account for this
potential behavior, be sure to map all four SAS addresses in the storage array configuration.
port is a “wide port” because it consists of four SAS lanes. Each lane has its own SAS address, and any
one of the four addresses can be considered the base address for the wide port. To safely account for this
potential behavior, be sure to map all four SAS addresses in the storage array configuration.
For example, the CLI command above returned a SAS address of 5003223000000000 for the first lane.
The other three lanes have consecutive addresses: 5003223000000001, 5003223000000002, and
5003223000000003. All four of those addresses should be mapped in the storage array configuration.
The other three lanes have consecutive addresses: 5003223000000001, 5003223000000002, and
5003223000000003. All four of those addresses should be mapped in the storage array configuration.
Connect The Storage Array
After the storage array is configured, connect it to the NAM using the SFF-8088 cable. The NAM-3
supports SFF-8088 cables up to six meters long. Be sure to use the correct host-connect port on the array
as indicated by the vendor’s user guide. The array can be connected while the NAM is running.
supports SFF-8088 cables up to six meters long. Be sure to use the correct host-connect port on the array
as indicated by the vendor’s user guide. The array can be connected while the NAM is running.
NAM
FCoE
FC or FCoE
FC/FCoE
Array
Nexus 5k
SAS Array
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