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- Feature Description And Operation Manual
Kemp High Availability Feature Description And Operation Manual
Summary of High Availability
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 1 / 37 high availability (ha) feature description high availability (ha) feature description version: 1.7 updated: june 2014.
Page 2: High Availability (Ha)
Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 2 / 37 high availability (ha) feature description copyright notices copyright © 2002-2014 kemp technologies, inc.. All rights reserved.. Kemp technologies and the kemp technologies logo are registered trademarks of kemp techno...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 3 / 37 high availability (ha) feature description redistribution and use in source and binary forms are permitted provided that the above copyright notice and this paragraph are duplicated in all such forms and that any docume...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 4 / 37 high availability (ha) feature description table of contents 1 introduction .................................................................................................................................... 6 1.1 inte...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 5 / 37 high availability (ha) feature description 9.11 ha issue on vmware ............................................................................................................. 28 9.11.1 both units think that they are t...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 6 / 37 high availability (ha) feature description 1 introduction the loadmaster system can be deployed as a single unit or in an active/standby dual-unit configuration (ha). Ha allows two physical or virtual machines to become...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 7 / 37 high availability (ha) feature description 2 advantages of high availability (ha) figure 2-1: typical 1-armed ha-setup the ultimate goal of redundant loadmasters is to provide reliable traffic management, even if one lo...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 8 / 37 high availability (ha) feature description 3 prerequisites there are some prerequisites to be aware of before setting up ha: two loadmasters must be set up and licensed loadmasters must be located on the same subnet in ...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 9 / 37 high availability (ha) feature description 4 ha components the ha components are listed and described below. Carp: keeps updated on the health of the partner governs whether the loadmaster will take the active role the ...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 10 / 37 high availability (ha) feature description 5 setting up ha 5.1 set up the first unit to build a ha loadmaster environment there are a number of settings that must be carefully specified. Follow the steps below to set u...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 11 / 37 high availability (ha) feature description 6. Specify the desired shared ip address in the ha shared ip address field and click set shared address . 7. A confirmation message may appear. Click ok . 8. A message may app...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 12 / 37 high availability (ha) feature description currently, they will probably be green and red since the ha2 unit has not yet joined the pair. For an explanation of all icon colors and statuses, refer to section 8.1.2 . 16....
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 13 / 37 high availability (ha) feature description figure 5-9: confirmation message 4. Click ok on the resulting message. Figure 5-10: shared ip address reminder 5. Click ok on the resulting message. Figure 5-11: network inter...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 14 / 37 high availability (ha) feature description figure 5-12: rebooting screen 13. Click the continue button. Passwords for the bal account are not synchronized across ha pairs, so ensure to use the same password on both uni...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 15 / 37 high availability (ha) feature description 5.3 enable the “use for ha checks” option some guidelines relating to the use for ha checks option are below: if you have a physical loadmaster, you can connect a direct cable...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 16 / 37 high availability (ha) feature description figure 5-15: confirmation message 5. A confirmation message may appear. Click ok . Figure 5-16: rebooting screen 6. Click continue . When ha1 is back online, both ha status ic...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 17 / 37 high availability (ha) feature description 6 how to perform a firmware update on ha pairs kemp recommends that firmware updates are performed outside of working hours. This is to ensure there is no interruption to clie...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 18 / 37 high availability (ha) feature description 7 ha disaster recovery process (replacing a defective unit) in a disaster recovery scenario you may need to replace one of the ha units. Prerequisites and installation steps f...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 19 / 37 high availability (ha) feature description 7. Enter the ha shared address . Click set shared address . 8. Enter the ha partner ip address . Click set partner address . 9. Click reboot now . 10. Wait 45 to 60 seconds, t...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 20 / 37 high availability (ha) feature description 7.2.2 change the switch to preferred server option to change the switch to preferred server option, follow the steps below in the wui of the shared ip address: 1. In the main ...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 21 / 37 high availability (ha) feature description 8 ha wui options see below for descriptions of the various ha-related fields in the loadmaster wui. 8.1.1 interfaces if the unit is part of an ha configuration, the following ...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 22 / 37 high availability (ha) feature description 8.1.2 ha parameters the role of the loadmaster can be changed by setting the ha mode. If the ha mode is set to ha (first) mode or ha (second) mode , a prompt will appear remin...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 23 / 37 high availability (ha) feature description when a loadmaster is in ha mode, the following screen appears when the ha parameters menu option is selected: figure 8-4: ha parameters screen ha status at the top of the scre...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 24 / 37 high availability (ha) feature description no ha icons if the ha status squares are not appearing in the wui, it probably means that ha is not enabled. Go to system administration > miscellaneous options > ha parameter...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 25 / 37 high availability (ha) feature description switch to preferred server by default, neither partner in a ha cluster has priority. So that when a machine restarts after a switchover, the machine becomes the slave and stay...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 26 / 37 high availability (ha) feature description 9 troubleshooting this section outlines troubleshooting steps for some common ha-related problems. If further help is needed, please contact kemp support. 9.1 general troubles...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 27 / 37 high availability (ha) feature description select more than one interface for ha checks for hardware loadmasters; connect eth1 with a direct cable, leave the interface unconfigured and select use for ha checks check th...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 28 / 37 high availability (ha) feature description 9.8 no access to wui on ha1/2 or shared if the wui is inaccessible via any of the three ip addresses, try the steps below: wait 5 minutes and try again. Sometimes wui access h...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 29 / 37 high availability (ha) feature description figure 9-3: virtual switch properties ensure that mac address changes and forged transmits are both selected. When they have been selected, reboot one of the loadmasters. Figu...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 30 / 37 high availability (ha) feature description 9.11.2 two virtual loadmasters on different hosts having two virtual loadmasters on different hosts can also pose problems on vmware. Figure 9-6: properties to resolve these i...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 31 / 37 high availability (ha) feature description 10 replacing ha units when replacing ha units it is important to follow the correct steps in sequence to ensure that there is little or no downtime for end users. The below ex...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 32 / 37 high availability (ha) feature description 6. Remove old unit 2 (b) from production. As old unit 1 (a) is master, this should not affect production. 7. In the wui of new unit 2 (d), in the main menu, go to system confi...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 33 / 37 high availability (ha) feature description figure 10-5: ha virtual id 18. Ensure that the ha virtual id is correct. 19. When the new unit 2 (d) is connected, open the wui of the shared ip address and in the main menu, ...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 34 / 37 high availability (ha) feature description old unit 1 (a) (standby) preferred master: unit 2 new unit 2 (d) (master) new unit 1 (c) old unit 2 (b) 23. Now, old unit 1 (a) can be removed from production. As new unit 2 (...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 35 / 37 high availability (ha) feature description 33. Check that the interface address (address[/prefix]) , the ha shared ip address and ha partner ip address are correct before adding it to the production unit. 34. In the ma...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 36 / 37 high availability (ha) feature description references unless otherwise specified, the following documents can be found at http://www.Kemptechnologies.Com/documentation . Ha for azure, feature description software migra...
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Copyright © 2002 - 2014 kemp technologies, inc. All rights reserved. Page 37 / 37 high availability (ha) feature description document history date change reason for change version resp. July 2013 initial draft initial draft of document 1.0 lb nov 2013 troubleshooting added provide troubleshooting st...