3Com SuperStack 4 Configuration Manual page 426

438 A D: 3C
PPENDIX OM
How XRN Interacts
with other Features
VLANs
XRN
3Com Switch
SuperStack 3 Switch
3300 Family
SuperStack 3 Switch
4200 Family
SuperStack 3 Switch
4400 Family
SuperStack II Switch
3800
SuperStack 3 Switch
4900 Family
3Com Switch 40x0
Family
3Com Switch 4005
3Com Switch 4007
3Com Switch 5500
Family
3Com Switch 5500G
Family
3Com Switch 7700
3Com Switch 8800
This section provides supplementary information on how XRN interacts with other
software features supported by your Switch.
Figure 109 shows a single aggregated link, created automatically via LACP,
connecting the Switch 5500G-EI stack to the Distributed Fabric. The Distributed
Fabric will take its VLAN membership from a port within the Switch 5500G-EI
stack .
If the Fabric Interconnect fails the aggregated link will split, creating two separate
aggregated links (as shown in
stack each have different VLAN membership, this will mean the two newly formed
aggregated links will also have different VLAN membership. This will result in the
different VLANs not being able to communicate.
3Com recommends that you set individual ports that are to be members of an
aggregated link to the same VLAN membership. This ensures communication
between all VLANs at all times.
Resilient STP/
Links RSTP MSTP
Yes Yes No
Yes Yes No
Yes Yes No
No Yes No
Yes Yes No
Yes Yes No
No Yes No
No Yes No
No Yes No
No Yes No
No Yes Yes
No Yes Yes
Figure 110). If the ports within the Switch 5500G-EI
Manual Link LACP Link
Aggregations Aggregations
Yes No
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes No
Yes Yes
Yes Yes
Yes No
Yes No