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Integrating 1GbE and 10GbE SANs, Integrating EqualLogic PS6x10 Arrays with Existing SANs

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4.6 Integrating 1GbE and 10GbE SANs With the introduction of 10GbE, there will be situations that require 1Gb arrays and 10Gb arrays coexisting in the same SAN infrastructure. EqualLogic PS Series arrays support operation of 1Gb and 10Gb arrays within the same group. There are advantages in running a mixed speed (1GbE 10GbE) SAN:  Not all of the application workloads on a SAN will require storage I/O performance that the 10Gb arrays provide. Thus, SAN administrators will have additional storage tiering flexibility based on array I/O performance.  The PS Series Group Manager will allow the SAN administrator to still manage both types of arrays within the same SAN group. There are many ways to design an iSCSI SAN that integrates 1GbE and 10GbE networks together. A significant factor affecting the design of a mixed speed iSCSI SAN is the feature set and port densities provided by the Ethernet switches you will be using in your SAN. To create a redundant, mixed speed iSCSI SAN, at a minimum we recommend that you start with dual 1GbE and dual 10GbE switches. Figure 14 shows an example SAN design, where two switches of each type are used. The design in Figure 14 is based on the features provided by the Dell PowerConnect 6248 1Gb Ethernet switch with 10GbE uplink modules, and the Dell PowerConnect 8024 10Gb Ethernet switch. The Dell PowerConnect 8024 is not a stackable switch, so a link aggregation group (LAG) is used to create the inter-switch trunk paths. Two additional LAG groups are created to connect to the 10GbE uplink ports on the 1Gb switches to the 10Gb switches. Note: See the following Dell EqualLogic whitepaper for more detailed analysis and guidelines for integrating 1GbE and 10GbE iSCSI SANs:  Integrating EqualLogic PS6x10 Arrays with Existing SANs, available at: http://www.equallogic.com/resourcecenter/assetview.aspx?id=9447 Dell EqualLogic Configuration Guide v11.3 38

Section	Page
1 Introduction	6
1.1 Audience	6
1.2 Document Structure	6
2 PS Series Storage Arrays	7
2.1 Array Models	7
2.2 Feature Comparison	8
2.3 Controllers	9
2.3.1 Controller Types	9
2.3.2 Controller Redundancy	10
2.3.3 Controller Failover	10
2.3.4 Firmware	12
Firmware Upgrade	13
2.4 RAID Policies	14
2.4.1 RAID 5	14
2.4.2 RAID 6	15
2.4.3 RAID 10	16
2.4.4 RAID 50	17
3 Peer Storage Operations	19
3.1 Groups	19
3.2 Pools	19
3.3 Volumes	20
3.3.1 Volume Attributes	21
3.3.2 Volume Features	22
3.3.3 Thin Provisioning	22
3.3.4 Snapshots	23
3.3.5 Cloning	23
3.3.6 Replication	24
Example Replication Topologies	25
Sizing Replica Reserve and Delegated Space	28
3.3.7 Clustering	29
4 SAN Design	30
4.1 Implementation of Standards	30
iSNS Support	30
4.2 General Requirements and Recommendations	30
4.2.1 Quality of Service (QoS)	31
4.3 Ethernet Switches and Infrastructure	32
4.3.1 Connecting SAN Switches in a Layer 2 Network	33
Stacking Switches	33
Non-Stacking Switches	34
Using a LAG to Connect Stacked Switches	34
4.3.2 Sizing Inter-Switch Connections	35
4.3.3 Comparing Inter-Switch Connection Types	36
4.4 Host Configuration Guidelines	37
4.4.1 Recommendations for Host Connectivity in Redundant SANs	37
4.4.2 Multi-Path I/O	38
EqualLogic MPIO Requirements	39
EqualLogic MPIO General Recommendations	39
Configuring Microsoft Windows MPIO	39
Configuring VMware vSphere 4.1 Multipathing Extension Module (MEM)	39
4.5 EqualLogic iSCSI SAN Design	40
4.5.1 Redundant SAN Configuration	40
4.5.2 Partially Redundant SAN Configurations	41
Single Array Controller Configurations	41
Dual Array Controller Configurations	42
4.6 Integrating 1GbE and 10GbE SANs	43
5 M1000e Blade Chassis Integration	45
5.1 Guidelines for Stacking Switches in a Blade Chassis	45
5.2 Single M1000e Enclosure Integration	46
5.3 Multiple M1000e Enclosure Integration	46
Dual I/O Module Stacks	46
Single I/O Module Stack	47
5.4 M1000e Ethernet Pass-Through I/O Module	48
5.5 External Tier Stacking	48
5.6 Stack to Stack Interconnect	48
5.6.1 10GbE Uplink Recommendations	48
5.6.2 1GbE Uplink Recommendations	49
Appendix A Network Ports and Protocols	52
A.1 Required Ports and Protocols	52
A.2 Optional Ports and Protocols	52
Appendix B Recommended Switches	54
B.1 Recommended 1GbE Switches	54
B.2 Recommended 10GbE Switches	55
Appendix C Supported iSCSI Initiators	56
C.1 Hardware iSCSI Initiators (HBAs)	56
C.2 Software iSCSI Initiators	57
C.3 Network Interface Controllers	58
Appendix D PowerConnect 54xx Switch Configuration	59
D.1 Disabling iSCSI Optimization Setting	59
D.2 Enabling the PortFast Option to Configure STP Edge Ports	60
D.3 Configuring Flow Control	60
D.4 Disabling Unicast Storm Control	61
D.5 Configuring Jumbo Frames	62
Appendix E PowerConnect 62xx Switch Configuration	63
E.1 Interface Naming Convention	63
E.2 Enabling the PortFast Option to Configure STP Edge Ports	64
E.3 Configuring Flow Control	64
E.4 Disabling Unicast Storm Control	64
E.5 Configuring Jumbo Frames	65
Appendix F Cisco IOS based Switch Configuration	66
F.1 Enabling the PortFast Option to Configure STP Edge Ports	67
F.2 Configuring Flow Control	67
F.3 Disabling Unicast Storm Control	68
F.4 Configuring Jumbo Frames	68

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Dell EqualLogic Configuration Guide v11.3

4.6

Integrating 1GbE and 10GbE SANs

With the introduction of 10GbE, there will be situations that require 1Gb arrays and 10Gb arrays

coexisting in the same SAN infrastructure. EqualLogic PS Series arrays support operation of 1Gb and

10Gb arrays within the same group. There are advantages in running a mixed speed (1GbE <-> 10GbE)

SAN:



Not all of the application workloads on a SAN will require storage I/O performance that the

10Gb arrays provide.

Thus, SAN administrators will have additional storage tiering flexibility

based on array I/O performance.



The PS Series Group Manager will allow the SAN administrator to still manage both types of

arrays within the same SAN group.

There are many ways to design an iSCSI SAN that integrates 1GbE and 10GbE networks together.

significant factor affecting the design of a mixed speed iSCSI SAN is the feature set and port densities

provided by the Ethernet switches you will be using in your SAN.

To create a redundant, mixed speed

iSCSI SAN, at a minimum we recommend that you start with dual 1GbE and dual 10GbE switches.

Figure 14 shows an example SAN design, where two switches of each type are used.

The design in

Figure 14 is based on the features provided by the Dell PowerConnect 6248 1Gb Ethernet switch with

10GbE uplink modules, and the Dell PowerConnect 8024 10Gb Ethernet switch.

The Dell PowerConnect

8024 is not a stackable switch, so a link aggregation group (LAG) is used to create the inter-switch

trunk paths. Two additional LAG groups are created to connect to the 10GbE uplink ports on the 1Gb

switches to the 10Gb switches.

Note:

See the following Dell EqualLogic whitepaper for more detailed analysis and guidelines for

integrating 1GbE and 10GbE iSCSI SANs:



Integrating EqualLogic PS6x10 Arrays with Existing SANs

available at:

http://www.equallogic.com/resourcecenter/assetview.aspx?id=9447