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680 APPENDIX D: 3COM XRN
Recovering your XRN
Network
In the event of a failure within your XRN network, 3Com recommends that you
follow the recommendations below.
Unit Failure The steps below outline the procedure to recover your XRN network in the event
of a unit failure within your Distributed Fabric.
1 Obtain a Switch and ensure it is installed with the same software version as the
failed Switch.
2 Initialize the new Switch so it is operating with its factory default settings.
3 Connect the new Switch to the operational Switch to form the Distributed Fabric.
4 IP interfaces and VLANs will be converged between the Switches, that is, IP
interfaces and the creation of the VLANs is done automatically on the new Switch.
However, any port-based configuration must be done manually.
5 If any Switch features, for example, IGMP snooping or passwords are not set to
default state then these should be reset after the new Distributed Fabric has been
formed.
Interconnect Failure The steps below outline the procedure to recover your XRN network in the event
of an interconnect failure within your Distributed Fabric.
1 Obtain a new cable.
2 Install the new cable.
How XRN Interacts
with other 3Com
Switches
This section provides guidelines on connecting legacy and new 3Com Switches
(including non-XRN enabled Switches) to an XRN Distributed Fabric. Table 694 lists
the features supported by the Switches that can be used when connecting to a
Distributed Fabric.
For detailed information on how the Switch features interact with XRN , refer to
the “How XRN Interacts with other Features” on page 681.
Table 694 Features supported by 3Com Switches connecting to an XRN Distributed Fabric
3Com Switch
Resilien
t
Links
STP/
RSTP
MSTP
Manual Link
Aggregation
s
LACP Link
Aggregations
3Com Switch 1100 Family Yes Yes No Yes No
3Com Switch 3300 Family Yes Yes No Yes No
3Com Switch 4200 Family Yes Yes No Yes Yes
3Com Switch 4400 Family Yes Yes No Yes Yes
3Com Switch 3800 Family No Yes No Yes Yes
3Com Switch 4900 Family Yes Yes No Yes Yes
3Com Switch 40x0 Family Yes Yes No Yes Yes
3Com Switch 4005 Family No Yes No Yes Yes
3Com Switch 4007 Family No Yes No Yes No
3Com Switch 5500 Family No Yes No Yes Yes
3Com Switch 5500G Family No Yes No Yes Yes
3Com Switch 7700 Family No Yes Yes Yes No
3Com Switch 8800 Family No Yes Yes Yes No