Administrator Guide

Supported Features
● Because PE interfaces only support Layer 2 mode, you cannot configure an IP address configuration and Layer 3 protocol
features.
NOTE: The only Layer 3 feature supported on PE ports is L3 VLANs
● A port extender supports the following L2 protocols on PE ports:
○ 802.1x
○ BPDU guard
○ LACP
○ 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 figure 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
configure PE 1, PE 2, and PE 3 from either of the systems.
Port Extenders (PEs)
715