Cisco SFE2000 Release Note page 10

RELEASE NOTES
Linksys One Ready Communications Solution
1 February 2007
A stack cannot include devices from different families; i.e., it cannot be comprised of FE units and GE
units.
A stack can be comprised of different types of units in the same family; i.e., a stack can support different
kinds of FE units OR different kinds of GE units.
PoE and non-PoE devices can be members of the same stack, as long as they are from the same family.
Stacking Ports
A standard copper GE cable is used to connect the stacked units.
If the unit is a "standalone" mode, all the GE ports are available to the user.
If the unit is in a "stack" mode, there are two, dedicated GE ports that are used for stack connection (port
12 and port 24 in SGE2000).
The default ports used for stacking are two pre-determined GE copper ports.
However, the user can define the stacking links to be the fiber links, instead of the copper ones. This can
be done after the system starts up, and the configuration takes effect after the stack is reset. (A stack is
reset by resetting the master unit.) The configuration is for the entire stack.
Stack Members Numbers - Unit ID
A stack member is identified by a unique number.
Stack Master Election Process
Only two Units at most in the entire stack can be "Master Enabled" unit, in other words can be elected as
a Master of the stack or Master Backup of the stack. "Master Enabled" units are determined by setting
their UNIT ID to one or two.
Master Failure Backup
The Master and its Master Backup maintain a "Warm Standby" approach in case an active Master fails.
If this happens, the Backup Master takes its place and continues to operate the Stack normally.
Hot extraction /Unit failure/Stacking cable disconnection or failure
Failure of a unit, hot extraction of a unit, or any stacking link failure causes a topology change, which is
monitored and kept by the Master of the stack.
VLAN Supported Features
VLAN Support
VLANs are collections of switching ports that comprise a single broadcast domain. Packets are classified
as belonging to a VLAN based on either the VLAN tag or based on a combination of the ingress port and
packet contents. Packets sharing common attributes can be grouped in the same VLAN.
Port Based Virtual LANs (VLANs)
Port-based VLANs classify incoming packets to VLANs based on their ingress port.
Linksys One Ready Communications Solution SFE2000/SFE2000P and SGE2000/
10
SGE2000P