Networking Features

1. Networking Features Upon completion of this module, you should be able to: Discuss and configure VNX networking features Networking Features

2. Networking Features Lesson 1: Networking Features Overview During this lesson the following topics are covered: Basic network concepts and terminology VLANs and VLAN tagging Roles of networking features Types of virtual devices Physical, virtual and logical interfaces on a Data Mover Networking Features

3. Networking Devices Overview • Ethernet hub (EMC recommends no hubs in VNX environment) • Layer 1 • All traffic sent to all ports • Half duplex mode only • Ethernet switch • Layer 2 • Sends traffic to specific port • 100Mbps+/Full duplex support • Managed Ethernet switch • Allow control and traffic management • Includes features such as Ethernet Channel, LACP and VLANs • Can operate at Layer 3 • Infrastructure must support VNX feature Networking Features

4. Virtual Local Area Network (VLANs) • Groupings of switch ports • Divides large number of ports • Confines broadcasts • Contributes to security • Can combine physically separate LANs • A VNX Physical device may be required to participate in multiple network segments • VLAN Tagging Networking Features

5. VLANs • Top diagram illustrates a “public network” • Bottom diagram illustrates three “private networks” • Physical location is not relevant to VLAN number • VLAN numbers are defined by the local administrator • InterVLAN traffic must be routed Networking Features

6. VLAN Tagging • A single network interface card can be assigned multiple logical interfaces • Different VLAN can be assigned to each interface • Destination IP address must match the interface IP address • The packet's VLAN tag must match the interface's VLAN ID • Zero (or blank) is the default value of VLAN ID • Packets are sent without tags (default value) • VLAN Tag (ID) • Written by device that transmits the frame • Switch port settings • Type trunk • Protocol setting 802.1Q Networking Features

7. VLAN Tagging (continued) • Protocol 802.1Q • Individual Ethernet switch port is classified as a trunk port • Administrator must allow specific VLANs to use the trunk port • VLAN tagging is seen in many enterprise networking environments Networking Features

8. Roles of Networking Features • High Availability: • Ethernet Channel • Link aggregation • Fail-Safe Network • Increase Network Flexibility: • VLAN Tagging Networking Features

9. Virtual Device Overview and Usage • Virtual device is a combination of multiple physical devices defined by a single MAC address. • You cannot individually assign same IP address to different physical devices on a Data Mover • Duplicate IP • Different MAC addresses • Virtual devices are used to distribute data among multiple physical ports in case of failure Networking Features

10. Types of VNX Virtual Devices • Ethernet Channel • Dependent on pre-existing Ethernet configuration (customer must provide) • Link Aggregation • Dependent on pre-existing Ethernet configuration (customer must provide) • Fail Safe Network • Independent of pre-existing Ethernet configuration • Should be configured across two Ethernet switches Networking Features

11. Ethernet Channel and LACP • Ethernet Channel • Static configuration • No support for Port Aggregation Protocol (PAgP) • Works with Cisco EtherChannel • Link Aggregation (LACP) • Industry standard (802.3ad) alternative to EtherChannel • Both provide more overall bandwidth than a single port • Connection to any single client runs through one physical port, and is therefore limited by the port’s bandwidth • When the connection to one port fails, the switch automatically switches traffic to the remaining ports Networking Features

12. Ethernet Channel and LACP Comparison Networking Features

13. VNX Use of Statistical Load Distribution • Applies for Ethernet Channels and Link Aggregation devices • Three methods of statistical load distribution • MAC address • IP address (default) • IP address and TCP port • Port Failure • Traffic redirect to live port • Incoming and outgoing traffic ports may differ Networking Features

14. Fail Safe Network • Extends link failover by providing switch-level redundancy • A FSN appears as a single link with a single MAC address, and potentially multiple IP addresses • A FSN is comprised of a physical port, Ethernet Channel, Link Aggregation or any combination of the three • Only one connection in a FSN is active at a time • There is no requirement that the connections making up a FSN be the same type, or that the connections be made to the same network switch Networking Features

15. Cross-Stack EtherChannel Cross-Stack Switches Stack A Switch 1 Switch 2 Switch 3 Cross-Stack EtherChannel Networking Features

16. Networking Features Lesson 1: Summary During this lesson the following topics were covered: Basic network concepts and terminology VLANs and VLAN tagging Roles of networking features Types of virtual devices Physical, virtual and logical interfaces on a Data Mover Networking Features

17. Networking Features Lesson 2: Networking Features Configuration During this lesson the following topics are covered: Creating an Ethernet Channel device Creating a LACP device Creating a FSN device Creating VLAN IDs on an interface Networking Features

18. VNX Network Terminology Review • Physical Device (device name) • The actual ports on the Data Mover (e.g., cge-1-0, fge-2-3) • Not a variable • Virtual Device (device name) • User assigned variable name • Combination of multiple physical devices • Logical Interface (interface name) • User/System assigned variable name • Assigned an IP address Networking Features

19. Physical Device (device name) • The physical port on a Data Mover • cge = Copper Gigabit Ethernet • fge = Optical Gigabit Ethernet • fxg = Optical 10 Gigabit Ethernet • Not a variable • Can support multiple interfaces/IP addresses with VLAN Tagging • 10/100/1000 Mbps or 10 Gbps • Half/Full/Auto Networking Features

20. Physical - Logical (device – interface) • No virtual devices in this configuration • An interface name is created and an IP address is assigned using a physical copper Gigabit Ethernet port on a primary Data Mover • Other IP addresses can be created on the same physical interface • Interface name must differ • VLAN Tagging may be required Networking Features

21. Physical - Virtual - Logical • Two physical devices (cge-1-0 and cge-1-1) are used to create a virtual device lacp0 using the LACP Protocol • An IP address is assigned using the virtual device lacp0 • Other IP address can be created on the same virtual interface • interface name must differ • VLAN Tagging Networking Features

22. Creating a Virtual Device • Cannot use physical devices that have previously been used • They will not be displayed • Standby Data Mover(s) will inherit configuration • Ethernet switch should be setup in advance (required for Ethernet Channel and Link Aggregation) • Primary Variables • Data Mover • Type • Ethernet Channel • Link Aggregation • Fail Safe Network • Device Name • User must configure Settings > Network > Settings for File > Devices > Create Networking Features

23. Creating an Ethernet Channel Virtual Device • Settings > Network > Settings for File > Devices (tab) > Create • Select Data Mover • Select Ethernet Channel • Enter Device Name • Select Ports • Select Speed/Duplex • Should be set to match Ethernet switch settings From Device tab Networking Features

24. Creating a Link Aggregation Virtual Device • Settings > Network > Settings for File > Devices (tab) > Create • Select Data Mover • Select Link Aggregation • Enter Device Name • Select ports • Select Speed/Duplex • Should be set to match Ethernet switch settings Note: cge-1-0 and cge-1-1 are not listed because they are already in use From Device tab Networking Features

25. Creating a FSN Virtual Device • Settings > Network > Settings for File > Devices (tab) > Create • Select Data Mover • Select Fail Safe Network • Enter Device Name • Select Devices • Primary (optional) • Standby • Can combine • Dissimilar Ethernet devices • Virtual and physical devices From Device tab Networking Features

26. FSN Role of Primary and Standby • Primary should be used if members are not equal • The primary is a better data path • More reliable • Faster • Optional • Standby • Will support failed link • Will not fail back when primary failure is corrected From Device tab Networking Features

27. Creating a Data Mover Interface • IP address are assigned to Virtual devices same as Physical devices • Physical devices used by Virtual devices will not be selectable • Auto calculating Broadcast Address • Default optional values • Name: The IP address with the value “-” replacing “.” • 10.0.0.1 would be 10-0-0-1 • MTU: 1500 • VLAN ID: 0 Networking Features

28. Managing Virtual Devices • Settings > Network > Settings for File > Devices • Right-click on device and select properties for more detail • Adjust speed and duplex Networking Features

29. Deleting Virtual Devices • Settings → Network → Settings for File → Devices • Select item for removal; right click > select delete, or click on delete button • Can only delete one virtual device at a time • Cannot delete devices that have dependencies • In use by CIFS server • In use by another virtual device • Virtual devices must be deleted in the reverse order from how they were created Networking Features

30. Networking Features Lesson 2: Summary During this lesson the following topics were covered: Creating an Ethernet Channel device Creating a LACP device Creating a FSN device Creating VLAN IDs on an interface Networking Features

31. Networking Features Lesson 3: Complex Examples and Considerations During this lesson the following topics are covered: Network features to support a complex environment VNX and Ethernet switch requirements Active data paths in case of failure Networking high availability considerations Networking Features

32. VNX Configuration • Two physical devices (cge-1-0 and cge-1-1) are used to create a virtual device “lacp0” on a Data Mover • Two physical devices (cge-1-2 and cge-1-3) are used to create another virtual device “lacp1” on a Data Mover • Both Virtual devices (lacp0,lacp1) are used to create another Virtual device “fsn0” • An IP address is assigned using the virtual device fsn0 lacp1 fsn0 lacp0 10.127.57.233 Networking Features

33. Optional: Creating Multiple Logical Interfaces • If connection to a single network segment is not enough, use VLAN Tagging • IP addresses are on different network segments (different VLANs) • VLAN value provided by Ethernet switch administrator • Set VLAN ID to match Ethernet switch value Example: If fsn0 uses all ports and customer needs to connect to multiple network segments, VLAN Tagging should be used Networking Features

34. Ethernet Switch Configuration fsn0 lacp1=cge-1-2,cge-1-3 (secondary) lacp0=cge-1-0,cge-1-1 (primary) Switch Switch Network Networking Features

35. Example: Active Data Path Phase 3: Port failures Phase 1: Normal Operation Phase 5: Failure resolved (no primary) Phase 2: Port failure Phase 4: Port failures Phase 5: Failure resolved (primary=lacp0) Networking Features

36. Speed and Duplex Considerations • VNX speed and duplex setting must match Ethernet switch • Failure to address has negative results • Failure to connect • Performance problems • Creation of an Ethernet Channel or Link Aggregation device requires user to set speed and duplex (default = 1000 FD) • An FSN device inherits speed and duplex currently configured on member devices See Basic Network Configuration module for more information Networking Features

37. Data Mover Failover Network Considerations • Failed network connections do not trigger Data Mover failover • Data Mover is operating normally, network is not • Standby Data Mover requires identical configuration • Any Ethernet Channels or Link Aggregation devices require same configuration on Ethernet switch • Any trunk ports used with VLAN tagging require same configuration on Ethernet switch • Test configuration when deploying configuration • Incorrect configuration for standby Data Mover could cause service interruption in failover situation Networking Features

38. Confirming the Ethernet Switch • Confirm channels have been created (if required) • Cisco EtherChannel • LACP • Typical for EMC personnel not to have access to Ethernet Switch devices • Dependency on customer to provide information • Confirm trunk ports have been created (if required) • Commands used to create channels are issued on the VNX AND Ethernet Switch Networking Features

39. LACP Considerations • A LACP link can be created with any number of physical devices • Only Full Duplex Ethernet ports can be used to create the link • If a mixture of port speeds is given, the Data Mover will choose the greatest number of ports at the same speed • In case of a tie, the fastest ports are chosen • Although multiple links are joined, no one client will gain an advantage from this configuration with regards to network speed or throughput • Link determined by source/destination IP address • Can also load balance based on source/destination MAC address or source/destination IP address AND source/destination TCP/UDP ports Networking Features

40. Networking Features Lesson 3: Summary During this lesson the following topics were covered: Network features to support a complex environment VNX and Ethernet switch requirements Active data paths in case of failure Networking high availability considerations Networking Features

41. Summary Key points covered in this module: • Virtual network devices extend fault tolerance into the network by providing port redundancy • FSN protects against switch failures • High Availability solution need to include aligned switch port configurations for Primary and Standby Data Movers Networking Features