User guide

30 ExtremeWare 7.2e Installation and User Guide
Summit 400-48 Switch Overview and Installation
ESRP-Aware Switches
Extreme switches that are not running ESRP, but are connected on a network that has other Extreme
switches running ESRP are ESRP-aware. When ESRP-aware switches are attached to ESRP-enabled
switches, the ESRP-aware switches reliably perform fail-over and fail-back scenarios in the prescribed
recovery times. No configuration of this feature is necessary.
NOTE
If you disable EDP on the switch, the switch is no longer ESRP-aware.
If Extreme switches running ESRP are connected to layer 2 switches that are not manufactured by
Extreme Networks (or Extreme switches that are not running ExtremeWare 4.0 or later), the fail-over
times seen for traffic local to the segment may appear longer, depending on the application involved
and the FDB timer used by the other vendor’s layer 2 switch. As such, ESRP can be used with layer 2
switches from other vendors, but the recovery times vary.
The VLANs associated with the ports connecting an ESRP-aware switch to an ESRP-enabled switch
must be configured using an 802.1Q tag on the connecting port, or, if only a single VLAN is involved, as
untagged.
To display ESRP-aware information, use the following command:
show esrp-aware [vlan <vlan name>]
The display includes the group number, MAC address for the master of the group, and age of the
information.
Software Licensing
Some Extreme Networks products have capabilities that are enabled by using a license key. Keys are
typically unique to the switch, and are not transferable. Keys are stored in NVRAM and, once entered,
persist through reboots, software upgrades, and reconfigurations. The following sections describe the
features that are associated with license keys.
Router Licensing
Some switches support software licensing for different levels of router functionality. In the
Summit 400-48t, routing protocol support is separated into two sets: Edge and Advanced Edge. Edge is
a subset of Advanced Edge.
Edge Functionality
Edge functionality requires no license key. Extreme switches that ship with an Edge license, do not
require a license key. Edge functionality includes all switching functions, and also includes all available
layer 3 QoS, access list, and ESRP functions. L3 routing functions include support for:
• IP routing using RIP version 1 and/or RIP version 2
• IP routing between directly attached VLANs
• IP routing using static routes
• ESRP-aware