Xtreme/GbE - Managed Carrier Ethernet Switch
Users Guide
Document: CTIM-00429
Revision: 0.11
Page 26 of 31
Date: 2021-01-05
Stacking Multiple Xtreme/GbE Boards to Achieve Higher Port Densities
Due to the stacking nature of the PC/104 and PCIe/104 for factor board, the Xtreme/GbE can easily be
stacked with other XDGs to achieve higher switch port densities. Some simple topology examples are
listed below to achieve 7 downstream ports with one XDG, 13 downstream ports with two XDG’s and 20
downstream ports with 3 XDG’s. This pattern will continue when stacking 4 or more XDGs.
1 x XDG = 7 Downstream Ports
2 x XDGs = 13 Downstream Ports
3 x XDGs = 20 Downstream Ports
Main Uplink
UL1
Main Uplink
UL1
Main Uplink
UL1
XDG#1 - GBE Port1
UL2
XDG#1 - GBE Port1
UL1
XDG#1 - GBE Port1
UL1
XDG#1 - GBE Port2
DS1
XDG#1 - GBE Port2
DS1
XDG#1 - GBE Port2
DS1
XDG#1 - GBE Port3
DS2
XDG#1 - GBE Port3
DS2
XDG#1 - GBE Port3
DS2
XDG#1 - GBE Port4
DS3
XDG#1 - GBE Port4
DS3
XDG#1 - GBE Port4
DS3
XDG#1 - GBE Port5
DS4
XDG#1 - GBE Port5
DS4
XDG#1 - GBE Port5
DS4
XDG#1 - GBE Port6
DS5
XDG#1 - GBE Port6
DS5
XDG#1 - GBE Port6
DS5
XDG#1 - GBE Port7
DS6
XDG#1 - GBE Port7
DS6
XDG#1 - GBE Port7
DS6
XDG#1 - GBE Port8
DS7
XDG#1 - GBE Port8
UL2
XDG#1 - GBE Port8
UL2
XDG#2 - GBE Port1
UL2
XDG#2 - GBE Port1
UL2
XDG#2 - GBE Port2
DS7
XDG#2 - GBE Port2
DS7
XDG#2 - GBE Port3
DS8
XDG#2 - GBE Port3
DS8
XDG#2 - GBE Port4
DS9
XDG#2 - GBE Port4
DS9
XDG#2 - GBE Port5
DS10
XDG#2 - GBE Port5
DS10
XDG#2 - GBE Port6
DS11
XDG#2 - GBE Port6
DS11
XDG#2 - GBE Port7
DS12
XDG#2 - GBE Port7
DS12
XDG#2 - GBE Port8
DS13
XDG#2 - GBE Port8
UL3
XDG#3 - GBE Port1
UL3
XDG#3 - GBE Port2
DS14
XDG#3 - GBE Port3
DS15
XDG#3 - GBE Port4
DS16
XDG#3 - GBE Port5
DS17
XDG#3 - GBE Port6
DS18
XDG#3 - GBE Port7
DS19
XDG#3 - GBE Port8
DS20