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Dell N1124T-ON firmware 6.7.0.4 and DHCPv6
I have several Dell EMC N1124T-ON switches and my clients using DHCPv6 or SLAAC to get an IPv6 address from a connected firewall (DHCPv6/SLAAC server).
This was working fine with firmware 6.6.0.24. After updating the switches to firmware 6.7.0.4 DHCPv6 was not working anymore. (SLAAC was still working fine).
After switching back to firmware 6.6.0.24 the DHCPv6 problem was solved.
Firmware 6.6.3.14 gave the same issue, DHCPv6 was not working for my clients.
Do I need additional settings to get DHCPv6 traffic working again with these new firmware releases? Could this be related to a firmware bug?
DELL-Young E
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August 8th, 2021 22:00
Hi, thanks for choosing Dell. please ensure after switching to 6.6.0.24, you also update bootcode command. Have you?
-R-B-
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August 8th, 2021 23:00
Yeah, I did, but it makes no difference.
I came from 6.6.0.24 and upgraded to 6.7.0.4 (and 6.6.3.14 is behaving the same).
Everything is working fine except DHCPv6 for my clients. The switch config is unchanged. With firmware 6.6.0.24 there is no problem with DHCPv6 for my clients.
The DHCPv6 server is on the same network/subnet, so I am not using a relay agent, no need for that.
-R-B-
7 Posts
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August 9th, 2021 02:00
The switch is not the DHCPv6 server, it is done by my firewall.
The DHCPv6 server is not the issue. When I replace the N1124 switch with an unmanaged switch, everything is running fine. When the N1124 switch is running on firmware 6.6.0.24 then everything is running fine too. The problem is there when running the N1124 switch with firmware 6.6.3.14 or 6.7.0.4.
Firmware 6.6.3.14 and 6.7.0.4 is doing something with the DHCPv6 traffic.
DELL-Young E
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August 9th, 2021 02:00
Hi, in that case, first backup all configuration (running and startup config) and then take maintenance window and delete DHCP configuration and re-configure DHCP server again. Before that please check DHCP server is reachable or not
bottom-line: "configure DHCP once again"
DELL-Young E
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August 9th, 2021 21:00
Hi, sorry it's been difficult. Would you send me your service tag through DM please?
-R-B-
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August 9th, 2021 23:00
I have sent the service tags via a PM.
DELL-Young E
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August 10th, 2021 00:00
Hi, received. Please give us time. Thank you.
-R-B-
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August 10th, 2021 00:00
Thank you!
DELL-Josh Cr
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August 10th, 2021 08:00
Hi, we are still looking into what could be the cause of the issue.
-R-B-
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August 10th, 2021 08:00
Great, thank you very much so far!
ITPepper
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September 15th, 2022 06:00
Thanks for posting this - It saved me enormous time, in finding a working version of firmware...
N1100v6.7.1.15.A09 was still not working...
-R-B-
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October 1st, 2022 08:00
I even tried to work with the Dell support engineers on this issue, but they never acknowledged it or resolved it. I have provided tons of logs etc. The issue is very clear and easy to reproduce. I had to ask every time for status updates because they did nothing by them selves. Finally (after a long time waiting and waiting) I decided to replace my Dell switches with FS switches where everything was working fine immediately. I am not going to buy Dell switches ever again because of this bad support experience.