Dell PowerConnect PC7024 Stacking Instructions
7000 series
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Also See for PowerConnect PC7024:
- Technical white paper (34 pages) ,
- Reference manual (1788 pages) ,
- Configuration manual (1270 pages)
Related Manuals for Dell PowerConnect PC7024
Summary of Contents for Dell PowerConnect PC7024
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Page 1: Series Switches
Stacking Dell PowerConnect 7000 Series Switches A Dell Technical White Paper www.dell.com support.dell.com │... - Page 2 ERRORS AND TECHNICAL INACCURACIES. THE CONTENT IS PROVIDED AS IS, WITHOUT EXPRESS OR IMPLIED WARRANTIES OF ANY KIND. © 2011 Dell Inc. All rights reserved. Reproduction of this material in any manner whatsoever without the express written permission of Dell Inc. is strictly forbidden. For more information, contact Dell.
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Page 3: Table Of Contents
Stacking Dell PowerConnect 7000 Series Switches Contents Introduction ........................ 2 Applicability ......................2 Stacking and Management .................... 2 Stacking and Performance .................... 2 Stacking and Redundancy ..................... 3 Power-Up Sequencing Considerations ................5 Initial Installation and Power-up of a Stack ................6 Selecting the Master Unit .................... -
Page 4: Introduction
Stacking Dell PowerConnect 7000 Series Switches Introduction This white paper explains the purpose and operation of the stacking feature in the Dell™ PowerConnect™ 7000 Series Gigabit Ethernet switches. The PowerConnect 7000 series is Dell’s most advanced switching product line, offering advanced switching capabilities including high-density, high- performance stacking, and 10 Gigabit Ethernet capabilities that scale from the small business to the Enterprise Edge. -
Page 5: Stacking And Redundancy
Stacking Dell PowerConnect 7000 Series Switches Stacking and Redundancy By connecting a cable from the last switch in a stack back to the first switch, the operator ensures that a stack has the protection of redundant paths for control and data traffic, including support for LAGs configured across multiple switches. - Page 6 Stacking Dell PowerConnect 7000 Series Switches Figure 2 shows a recommended stacking configuration with dual stacking modules on each switch. Each switch connects to another with 128 Gbps of total bandwidth (4 ports @ 16 Gbps Tx and Rx each). Note that in the recommended configuration, the dual stacking cables from each module both connect to the same switch.
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Page 7: Power-Up Sequencing Considerations
Stacking Dell PowerConnect 7000 Series Switches Power-Up Sequencing Considerations The selection of the manager and standby units is important in situations where the administrator wishes to utilize the serial port for management, perhaps as a backup console. Management of the stack via the out-of-band service port or the in-band ports is transparent in a stack. -
Page 8: Initial Installation And Power-Up Of A Stack
Stacking Dell PowerConnect 7000 Series Switches Initial Installation and Power-up of a Stack Follow these instructions to create a stack: NOTE: Install units in a rack whenever possible to prevent the units and cables from being disturbed. 1. Install all stacking cables. Fully connect all cables, including the redundant stack link. -
Page 9: Selecting The Master Unit
Stacking Dell PowerConnect 7000 Series Switches Selecting the Master Unit A stack manager is elected or re-elected based on the following considerations, in order: Whether the switch that was previously the stack manager. Whether the switch has the higher MAC address. -
Page 10: Updating The Firmware On A Stack
Stacking Dell PowerConnect 7000 Series Switches Updating the Firmware on a Stack Automatic Update By default, firmware synchronization is performed automatically when a unit is powered up on a stack. Because firmware synchronization makes no attempt to check for the latest version of firmware, the following procedure is recommended for bringing all members of a stack onto the same version of code. -
Page 11: Manual Update
Stacking Dell PowerConnect 7000 Series Switches Manual Update You can perform firmware updates on the stack by using the CLI or the Web interface. From the CLI, use the copy ftp command, which uses the FTP protocol for file transfer. To update the firmware by using the Web interface, use the options available on the System >... - Page 12 Stacking Dell PowerConnect 7000 Series Switches Page 10...
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Page 13: Creating Separate Vlan For File Downloads
Stacking Dell PowerConnect 7000 Series Switches Creating a Separate VLAN for File Downloads When updating the firmware, it is helpful to keep the in-band management port in a different VLAN and configure the PVID appropriately to avoid any network congestion or flooding issues through which the file is being downloaded. - Page 14 Stacking Dell PowerConnect 7000 Series Switches To perform the same configuration by using the Web interface, use the following steps: From the Switching > VLAN > VLAN Membership page, click Add. 2. From the Add VLAN page, enter 1000 in the VLAN ID field and click Apply.
- Page 15 Stacking Dell PowerConnect 7000 Series Switches 4. Configure port gi1/0/17 in General mode with a PVID of 1000 and click Apply Changes. 5. From the Show VLAN menu on the Switching > VLAN > VLAN Membership page, select 1000. 6. Click the Static box for port 17 so that the letter U (untagged) appears in the box.
- Page 16 Stacking Dell PowerConnect 7000 Series Switches 8. Navigate to the Routing > IP > IP Interface Configuration page. 9. In the Interface field, select VLAN 1000. In the Routing Mode field, select Enable. In the IP Address Configuration Method field, select Manual. In the IP Address field, enter 192.168.21.11.
- Page 17 Stacking Dell PowerConnect 7000 Series Switches Click Apply. Navigate to the System > Management Security > Access Profile page. Choose the Access Profile tab. Enable the Set Active Access Profile check box in the MGMT_VLAN Access Profile and click Apply.
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Page 18: Adding A Stack Member With Minimal Interruption
Stacking Dell PowerConnect 7000 Series Switches Adding a Stack Member with Minimal Interruption When adding a new member to a stack, make sure that only the stack cables and no network cables are connected before powering up the new unit. Make sure the end-user links are not connected to any ports on the unit being added and the new member is powered off. -
Page 19: Removing A Stack Member With Minimal Interruption
Stacking Dell PowerConnect 7000 Series Switches Removing a Stack Member with Minimal Interruption NOTE: This migration process can be disruptive, so schedule some outage time. To minimize any disruption, plan on having one or more test scenarios prepared in order to verify that the migrated ports are operating properly. -
Page 20: Merging Two Operational Stacks
Stacking Dell PowerConnect 7000 Series Switches Merging Two Operational Stacks The recommended procedure for merging two operational stacks is as follows: 1. Always power off all units in one stack before connecting to another stack. 2. Add the units as a group by unplugging one stacking cable in the operational stack and physically connecting all unpowered units. -
Page 21: Synchronizing The Running Configuration Between The Master And Standby Units
Stacking Dell PowerConnect 7000 Series Switches Synchronizing the Running Configuration between the Master and Standby Units The Master unit copies its running configuration to the Standby unit whenever the configuration changes (subject to some minimal time delays introduced in the copy mechanism to increase the efficiency of the transfer process). -
Page 22: Failover Scenarios
Stacking Dell PowerConnect 7000 Series Switches Failover Scenarios This section describes examples of what happens when a stack member or the Master unit fails. Scenario 1 In this example, the stack has four members that are connected through a daisy-chain. When all four... -
Page 23: Scenario 2
Stacking Dell PowerConnect 7000 Series Switches Scenario 2 Consider the same example with a four-unit stack connected in daisy-chain fashion. Stack Split Figure 3. Stack 1 Switch 1 Switch 1 Switch 2 Standby Switch 2 Master Switch 3 Switch 3... -
Page 24: Scenario 3
Stacking Dell PowerConnect 7000 Series Switches Scenario 3 The following example contains a similar condition with a Master unit failover and consequent stack split with five units in the stack, as Figure 4 shows. Stack Split with Manager Failure Figure 4. -
Page 25: Nonstop Forwarding
Stacking Dell PowerConnect 7000 Series Switches Nonstop Forwarding A switch can be described in terms of three semi-independent functions called the forwarding plane, the control plane, and the management plane: Forwarding Plane — The set of hardware components that forward data packets without intervention from a control CPU, sometimes called the Data Plane. -
Page 26: Initiating A Warm Failover Of The Manager Unit
Stacking Dell PowerConnect 7000 Series Switches To take full advantage of nonstop forwarding, layer 2 connections to neighbors should be via port channels that span two or more stack units, and layer 3 routes should be ECMP routes with next hops via physical ports on two or more units. - Page 27 Stacking Dell PowerConnect 7000 Series Switches Nonstop Forwarding Example Figure 5. Host 1 Video stream 192.168.5.100 Router 1 OSPF PIM-SM VLAN 10 Spanning Tree IGMP VLAN 20 Switch 1 Switch 2 192.168.20.101 192.168.20.100 Host 3 Host 2 Page 25...
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Page 28: Nsf Scenario Configuration Via Cli
Stacking Dell PowerConnect 7000 Series Switches NSF Scenario Configuration via CLI Router 1: configure terminal hostname Router_1 ip multicast ip pim rp-address 192.168.10.1 239.0.1.1 255.255.255.0 ip pim sparse vlan database vlan 10 exit interface vlan 10 ip address 192.168.10.1 255.255.255.0... - Page 29 Stacking Dell PowerConnect 7000 Series Switches ----------------------------------------- Stack: configure terminal vlan database vlan 10,20 exit vlan 10 name “Routed interface to PIM RP via port-channel 1” exit vlan 20 name “Routed interface to downstream switched network” exit hostname "nsf-stack" spanning-tree mode rst...
- Page 30 Stacking Dell PowerConnect 7000 Series Switches interface gi1/0/10 no spanning-tree auto-portfast channel-group 1 mode auto exit interface gi2/0/10 no spanning-tree auto-portfast channel-group 1 mode auto exit interface gi2/0/20 switchport mode general switchport general pvid 20 switchport general acceptable-frame-type tagged-only switchport general allowed vlan add 20 tagged...
- Page 31 Stacking Dell PowerConnect 7000 Series Switches interface gi1/0/1 switchport mode access switchport access vlan 20 exit interface gi1/0/5 switchport mode general switchport general pvid 20 switchport general acceptable-frame-type tagged-only switchport general allowed vlan add 20 tagged switchport general allowed vlan remove 1...
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Page 32: Nsf Example 1
Stacking Dell PowerConnect 7000 Series Switches NSF Example 1 Assume Unit 1 is the Stack Manager and Unit 2 is the Standby switch. The following scenarios illustrate how the network recovers when Unit 1 is powered down. With NSF disabled: Unit 2 takes over as Manager with a cold restart and clears the hardware tables. -
Page 33: Nsf Re-Convergence Timing
Stacking Dell PowerConnect 7000 Series Switches NSF Re-convergence Timing As mentioned in the previous section, NSF protects against failures by check-pointing information to a standby unit. In an NSF-protected stack, the worst-case scenario is when the master unit fails. The following statistics show representative re-convergence times of an NSF-enabled standby switch as measured from the detection of failure. -
Page 34: Small Configuration
Stacking Dell PowerConnect 7000 Series Switches Small Configuration 6 switches stacked 4 VLANs, all ports are members of all VLANs 2/2 static/dynamic lags with 8 members each 1 MSTP instance with VLANs 15 ACLs applied on 15 interfaces ... - Page 35 Stacking Dell PowerConnect 7000 Series Switches Page 33...
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Page 36: Stacking Web Interface
Summary This paper has described the theory and operation of stacking on the Dell PowerConnect 7000 series of switches. Delivering significant rack density, the PowerConnect 7000 gives network administrators the flexibility to maximize server and workstation connectivity in a 1U form factor. Stacking provides the ultimate in ease of use and manageability with automatic firmware version synchronization and a single management interface for up to 12 switches. - Page 37 Stacking Dell PowerConnect 7000 Series Switches capacity as your business grows. In summary, the value of stacking helps reduce your total cost of ownership (TCO), increase your business agility, and improve your network resiliency. Page 35...