Stacking Limitations
Stack Membership
© Copyright IBM Corp. 2011
The G8000 with N/OS 6.8 can operate in one of two modes:
•
Default mode, which is the regular stand-alone (or non-stacked) mode.
•
Stacking mode, in which multiple physical switches aggregate functions as a
single switching device.
When in stacking mode, the following stand-alone features are not supported:
•
Active Multi-Path Protocol (AMP)
•
BCM rate control
•
Border Gateway Protocol (BGP)
•
IGMP Relay and IGMPv3
•
IPv6
•
Link Layer Detection Protocol (LLDP)
•
Loopback Interfaces
•
MAC address notification
•
MSTP
•
OSPF and OSPFv3
•
Port flood blocking
•
Protocol-based VLANs
•
RIP
•
Router IDs
•
Route maps
•
sFlow port monitoring
•
Static MAC address adding
•
Static multicast
•
Uni-Directional Link Detection (UDLD)
•
Virtual Router Redundancy Protocol (VRRP)
Note: In stacking mode, switch menus and command for unsupported features
may be unavailable, or may have no effect on switch operation.
A stack contains up to six switches, interconnected by a stack trunk in a local ring
topology (see
Figure 18 on page
failure is allowed.
An operational stack must contain one Master and one or more Members, as
follows:
•
Master
One switch controls the operation of the stack and is called the Master. The
Master provides a single point to manage the stack. A stack must have one and
only one Master. The firmware image, configuration information, and run-time
data are maintained by the Master and pushed to each switch in the stack as
necessary.
•
Member
Member switches provide additional port capacity to the stack. Members receive
configuration changes, run-time information, and software updates from the
Master.
154). With this topology, only a single stack link
149
Chapter 13. Stacking