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Stacking speed for X440-G2


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?

5 replies

Userlevel 4
Hi,



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

Hi,



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



Thank you!
Naresh wrote:

Hi,



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



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...
Naresh wrote:

Hi,



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



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.
Userlevel 5
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
Userlevel 5
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

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