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# citrix-netscalers
Slackbot
07/07/2020, 4:55 PMThis message was deleted.
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c4rm0
07/07/2020, 5:53 PMis there still gothas with hdx insight with session reliability on ha failover ? think i can remember reading about limitations if hdx insight was enabled has been a while tho
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Leee Jeffries
07/07/2020, 8:51 PMI'm not aware John, if you find anything please do share. Happy to amend / share.
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Ray Davis
07/07/2020, 9:20 PMI recall that as well. I think I read it in Carl Stalhood site. Let me check.
Ray Davis
07/07/2020, 9:23 PM1. Looks like it was for 11.1 builds but around high bandwidth consomtion "From Session Reliability on NetScaler High Availability Pair at Citrix Docs: Enabling this feature will result in increased bandwidth consumption, which is due to ICA compression being turned off by the feature, and the extra traffic between the primary and secondary nodes to keep them in sync.
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Ray Davis
07/07/2020, 9:23 PMhttps://www.carlstalhood.com/citrix-application-delivery-management-adm-13/ (realtes for hdx and session reliability info)
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Rink Spies
07/08/2020, 5:17 AMDid anyone do a measurement how much "increased bandwidth consumption" this would be ?
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Leee Jeffries
07/08/2020, 6:30 AMThanks Ray, I wasn't aware. Would be good to quantify this.
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Ray Davis
07/08/2020, 12:07 PMI remembered reading it, just could figure out where until John triggered it
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Ray Davis
07/08/2020, 1:31 PM@Carl Stalhood Do you know the "increased bandwidth" estimation?
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Julian Jakob
07/09/2020, 8:32 AMAnd another one from my site:
Enabled the feature (12.1 57.18) and did some tests. Failover with EDT session -> ~25 sek freeze
Failover with TCP session -> ~3 sek freeze
Is UDP needing more time to reinitialize the active sessions?
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Ray Davis
07/09/2020, 12:48 PMI can say I am not impressed with UDP. I read alot of blogs around it and how good it is. But my experiences are not good.
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Leee Jeffries
07/09/2020, 12:51 PMThat's not great.
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Ray Davis
07/09/2020, 12:53 PMI have a change next week to upgrade NS to 12.1.57 and to adjust the MTU with MTU discovery. I am hoping after than I can see some improvements.
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