Setup Guide

– LAGs
– LLDP
– Loop detection and MAC Learning Limit
• A port extender does not support:
– DCB
– FEFD
– GVRP
– FRRP
– Sticky MAC
– STP Edge port support on PE interfaces
– VLAN stacking
– VLT
Dual Homing
Dual homing provides support to manage and control the PEs from both the primary and the secondary chassis in a VLT setup. The C9010
switch supports dual homing using port extenders. You can also stack the port extenders in a dual homing setup. The following gure
shows PE dual homing, where the port extenders are dual-homed to a pair of C9010 switches.
Figure 108. Dual Homing — Sample Topology
In the preceding illustration, Port Extender PE 1 is connected to System A and Port Extender PE 2 is connected to System B. PE 3 is
connected to both A and B. When the systems A and B are connected to each other and made as VLT peers, you can congure PE 1, PE 2,
and PE 3 from either of the systems.
System A is the primary controlling bridge and System B is the secondary. When the primary system goes down, the secondary system
acts as primary and controls the PEs. The common PE congurations are synchronized between the systems when congured using the
Conguration Terminal Batch mode.
NOTE
: When multiple PEs are connected in a dual homing setup, ensure that each PE has an unique ID so that the IDs do not
overlap during the conguration.
770 Port Extenders (PEs)