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WojtusW5
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CRS326-24S+2Q+RM - 40G passive connection with Huawei

Fri Aug 23, 2019 5:15 pm

Hello, I have a problem with connecting CRS326-24S + 2Q + RM with Huawei S6720-54C-EI-48S-AC switch. The connection is made using a MikroTik Q+DA0001 40GBPS QSFP+ cable.
Both devices can see the passive cable correctly. Interestingly, when 2 ports of the same device are connected (MikroTik and Huawei) through the MikroTik passive cable, the ports are rising.
Has anyone had a similar problem ?

Thank you in advance for your help.
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Guntis
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Re: CRS326-24S+2Q+RM - 40G passive connection with Huawei

Wed Aug 28, 2019 3:52 pm

What did you mean by "when 2 ports of the same device are connected (MikroTik and Huawei) through the MikroTik passive cable, the ports are rising." ?
 
WojtusW5
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Re: CRS326-24S+2Q+RM - 40G passive connection with Huawei

Wed Aug 28, 2019 8:34 pm

If I connect 2 ports 40G with a MikroTik passive cable on a Huawei switch (making a theoretical loop) the ports are up.
If I connect 2 ports 40G with a MikroTik passive cable on a MikroTik CRS 326 switch (making a theoretical loop) the ports are up.
If I connect using the same cable Huawei to MikroTik ports remain down.
I invite you to visit my blog
https://mikrotikon.pl/
 
Guntis
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Re: CRS326-24S+2Q+RM - 40G passive connection with Huawei

Fri Aug 30, 2019 8:44 am

Please send us email about this at support@mikrotik.com
 
lix5027
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Re: CRS326-24S+2Q+RM - 40G passive connection with Huawei

Wed Sep 04, 2019 7:23 am

If I connect 2 ports 40G with a MikroTik passive cable on a Huawei switch (making a theoretical loop) the ports are up.
If I connect 2 ports 40G with a MikroTik passive cable on a MikroTik CRS 326 switch (making a theoretical loop) the ports are up.
If I connect using the same cable Huawei to MikroTik ports remain down.
Yes, I have the same problem.

When I used qsfp-qsfp DAC cable, the Huawei port is down, the CRS328 port is down.

ros version is 6.45.5 6.46.b38
 
lix5027
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Re: CRS326-24S+2Q+RM - 40G passive connection with Huawei

Wed Sep 04, 2019 7:41 am

good news!

you should disable HW switch "negotiation",enable CRS326 auto negotiation.

then the 40G port is up!
In CRS , It will show qsfp1 up (2,3,4 down), but you can see the qsfp1 port speed is 40G.
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