Specifications

Switch Protection
ExtremeWare XOS 11.0 Concepts Guide 157
You can clear the DHCP address allocation table selected entries, or all entries. You would use this
command to troubleshoot IP address allocation on the VLAN. To clear entries, use the following
command:
clear vlan <vlan_name> dhcp-address-allocation [[all {offered | assigned | declined |
expired}] | <ipaddress>]
Displaying DHCP Information
To display the DHCP configuration, including the DHCP range, DHCP lease timer, network login lease
timer, DHCP-enabled ports, IP address, MAC address, and time assigned to each end device, use the
following command:
show dhcp-server {vlan <vlan_name>}
The next two commands were retained for compatibility with earlier versions of ExtremeWare. To view
only the address allocation of the DHCP server on a VLAN, use the following command:
show vlan <vlan_name> dhcp-address-allocation
To view only the configuration of the DHCP server on a VLAN, use the following command:
show vlan <vlan_name> dhcp-config
Switch Protection
Switch protection features enhance the robustness of switch performance. In this category are the
following features:
• Routing access profiles
• Route maps
• Policies
Routing access profiles are used to control the advertisement or recognition of routing protocols, such as
Routing Information Protocol (RIP), Open Shortest Path First (OSPF), or Border Gateway Protocol
(BGP). Routing access profiles can be used to “hide” entire networks or to trust only specific sources for
routes or ranges of routes. The capabilities of routing access profiles are specific to the type of routing
protocol involved, but these profiles are sometimes more efficient and easier to implement than access
lists.
Route maps are used to modify or filter routes. They are also used to modify or filter routing
information.
In ExtremeWare XOS, all of these features are supported by the concept of a policy. If you have used
any of these features in the past, you will now use policies to achieve the same results.
Policies
Policies are a more general concept than routing access profiles and route maps. ExtremeWare XOS uses
policies to implement routing access profiles and route maps. A central manager processes policies, and
various policy clients, such as BGP or OSPF, get the policies from the central manager.