Stacking speed for X440-G2

[Igor3]

Could please explain me which stacking speed on X440-G2? I read documentation and see 10Gbit/s. This is full or half duplex? Can I reach 20Gbit/s on one stack link?

[Bin]

Hello Igor, Naresh is correct the max. link speed for x440-G2 stacking port is 10Gbps. But, the bidirectional stacking link is 40 Gbps, in other words, the stacking bandwidth of x440-G2 is 40Gbps.
Note, the port speed is the unidirectional speed of the port. The bidirectional rate = the unidirectional rate X 2 (bidirectional) X 2 (ports).

Regards,
Bin

[Naresh]

Hi,



Stacking ports on the X440-G2 come up with 10G speed with full duplex. And we can’t configure stacking ports as 20Gb

[Jeremy_Gibbs]

I don't see any reference to 40 Gbps in any of those for a 440. The higher stacking speeds on other platforms are had by using different VIM modules.

If you have a 10 Gbps FDX link, and you are going 100% in each direction, that is 20 Gbps. I don't know if you could actually achieve that throughput though. A test engineer from Extreme would know the answer to that.

[Igor3]

But how we can reach 40Gb stacking? Regarding this document we have stack option 40Gb for x440-g2 - http://documentation.extremenetworks.com/summit/Summit_Family_HW_Install/Stacking/r_stacking-cables....

Regarding this document we can use only 2 ports for stacking - http://documentation.extremenetworks.com/summit/EXOS_21_1/Stacking/t_select-native-and-alternate-sta...

In table regarding x440-g stacking options we can see abbrevation HDX, may it be Half-Duplex? http://documentation.extremenetworks.com/summit/summit_family_hw_install/Stacking/c_stacking-conside...