https://community.extremenetworks.com/t5/extremeswitching-exos-switch/summitstack-v320-stacking-bandwidth-capacity/m-p/38643#M8387 Hi,<BR /> <BR /> I'm still confused with SummitStack-V320 stacking bandwidth capacity. Isn't it 320Gbps (4x 80Gbps) full duplex bandwidth? Following is stacking information of two X670V-48T, each with VIM4-40G4X module.<BR /> <BR /> <P class="fancybox-image"><span class="lia-inline-image-display-wrapper" image-alt="4a724530a3a44e8485151d403c6dbaf0_RackMultipart20170408-32326-1ji22rz-show_stacking_stack-ports_inline.png"><img src="https://community.extremenetworks.com/t5/image/serverpage/image-id/3613i268AF9D6364C592E/image-size/large?v=v2&amp;px=999" role="button" title="4a724530a3a44e8485151d403c6dbaf0_RackMultipart20170408-32326-1ji22rz-show_stacking_stack-ports_inline.png" alt="4a724530a3a44e8485151d403c6dbaf0_RackMultipart20170408-32326-1ji22rz-show_stacking_stack-ports_inline.png" /></span></P><BR /> <BR /> I don't think that I can have 320Gbps full duplex stacking bandwidth because two ports are blocked due to stacking ring topology. Why two nodes stacking require ring topology on stacking? Can I disable stacking ring topology so I can have 320Gbps full duplex stacking bandwidth?<BR /> <BR /> Best regards, Sat, 08 Apr 2017 21:51:00 GMT Mrxlazuardin 2017-04-08T21:51:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/summitstack-v320-stacking-bandwidth-capacity/m-p/38643#M8387 Hi,<BR /> <BR /> I'm still confused with SummitStack-V320 stacking bandwidth capacity. Isn't it 320Gbps (4x 80Gbps) full duplex bandwidth? Following is stacking information of two X670V-48T, each with VIM4-40G4X module.<BR /> <BR /> <P class="fancybox-image"><span class="lia-inline-image-display-wrapper" image-alt="4a724530a3a44e8485151d403c6dbaf0_RackMultipart20170408-32326-1ji22rz-show_stacking_stack-ports_inline.png"><img src="https://community.extremenetworks.com/t5/image/serverpage/image-id/3613i268AF9D6364C592E/image-size/large?v=v2&amp;px=999" role="button" title="4a724530a3a44e8485151d403c6dbaf0_RackMultipart20170408-32326-1ji22rz-show_stacking_stack-ports_inline.png" alt="4a724530a3a44e8485151d403c6dbaf0_RackMultipart20170408-32326-1ji22rz-show_stacking_stack-ports_inline.png" /></span></P><BR /> <BR /> I don't think that I can have 320Gbps full duplex stacking bandwidth because two ports are blocked due to stacking ring topology. Why two nodes stacking require ring topology on stacking? Can I disable stacking ring topology so I can have 320Gbps full duplex stacking bandwidth?<BR /> <BR /> Best regards, Sat, 08 Apr 2017 21:51:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/summitstack-v320-stacking-bandwidth-capacity/m-p/38643#M8387 Mrxlazuardin 2017-04-08T21:51:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/summitstack-v320-stacking-bandwidth-capacity/m-p/38644#M8388 Hi, In a stacking ring topology there's no port blocked for unicast traffic, only for bum traffic. Sun, 09 Apr 2017 12:59:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/summitstack-v320-stacking-bandwidth-capacity/m-p/38644#M8388 Stephane_Grosj1 2017-04-09T12:59:00Z