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S6720SI won't work stacking on Xgigabit onboard ports

Created: Mar 4, 2020 22:08:12Latest reply: Mar 13, 2020 02:39:23 136 5 0 0
  Rewarded HiCoins: 0 (problem resolved)

Hi Everybody,

I am configuring a stack between 2 S6720SI with copper passive cables in all the four ports. I tried a ring configuration using Xgigabit 0/0/1 to 2 as stack port 1 and Xgigabit 0/0/3 to 4 as stack port 2 in both switches. When cables are connected switches begin an endless boot cycle. I also tried a chain configuration with all 4 ports in each switch with same results. I tried stacking with the copper ports (23-24) and it works like a charm. In both cases I used the configuration example in the web site. Am I missing something? Is there something special about those ports?

Thanks!

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Popeye_Wang
Admin Created Mar 5, 2020 01:20:57 Helpful(0) Helpful(0)

Hello,

Only the last 16 10GE ports on the front panel can be used to set up a stack using dedicated stack cables.

stack


 You can use the Stack & SVF Assistant tool to quickly obtain the iStack, CSS, and SVF deployment guides, including the connection modes and configuration procedures.

I hope this helps.

View more
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eestigarribia
eestigarribia Created Mar 5, 2020 16:17:19
Thanks for your answer! I saw this document. The 6720-SI has 24 copper ports+4 SFP+. My customer also purchased (I did not installed yet, though) an additional 4 ports sfp+ daughter board. I am trying to set up the stack on the 4 sfp+ with no luck. I thought xgethernet ports (SFP) weren't supported, but I saw examples using those ports, that's why I an disoriented. The stack cables are SFP+ to SFP+ copper cables. The restriction means I can't use those ports and I should use the last copper?  
Popeye_Wang
Popeye_Wang Reply eestigarribia  Created Mar 13, 2020 02:30:57
As the picture shows, this restriction applies only to dedicated stack cables. If the cable is okay but the stack is not set up properly, please check the configuration and cable connection.  
All Answers
Popeye_Wang
Popeye_Wang Admin Created Mar 5, 2020 01:20:57 Helpful(0) Helpful(0)

Hello,

Only the last 16 10GE ports on the front panel can be used to set up a stack using dedicated stack cables.

stack


 You can use the Stack & SVF Assistant tool to quickly obtain the iStack, CSS, and SVF deployment guides, including the connection modes and configuration procedures.

I hope this helps.

View more
  • x
  • convention:

eestigarribia
eestigarribia Created Mar 5, 2020 16:17:19
Thanks for your answer! I saw this document. The 6720-SI has 24 copper ports+4 SFP+. My customer also purchased (I did not installed yet, though) an additional 4 ports sfp+ daughter board. I am trying to set up the stack on the 4 sfp+ with no luck. I thought xgethernet ports (SFP) weren't supported, but I saw examples using those ports, that's why I an disoriented. The stack cables are SFP+ to SFP+ copper cables. The restriction means I can't use those ports and I should use the last copper?  
Popeye_Wang
Popeye_Wang Reply eestigarribia  Created Mar 13, 2020 02:30:57
As the picture shows, this restriction applies only to dedicated stack cables. If the cable is okay but the stack is not set up properly, please check the configuration and cable connection.  
Aroot
Aroot Admin Created Mar 13, 2020 02:39:12 Helpful(0) Helpful(0)

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  • convention:

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Aroot
Aroot Admin Created Mar 13, 2020 02:39:23 Helpful(0) Helpful(0)

  • x
  • convention:

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