Helper Ip Interface Configuration - D-Link DWS-4026 User Manual

D-Link Unified Access System
Field
MAC Address
Encapsulation Type
Proxy ARP
Local Proxy ARP
IP MTU
Bandwidth
Destination Unreachables
ICMP Redirects
• Click Submit to send the updated configuration to the switch. These changes will not be retained across a power cycle
unless a Save configuration is performed.
• Click Helper-IP Address to proceed to the Helper Address configuration page.

Helper IP Interface Configuration

Use the Helper IP Interface Configuration page to add a Helper IP address to the interface. The IP Helper feature allows the
switch to forward certain configured UDP broadcast packets to a particular IP address. This allows various applications to
reach servers on non-local subnets, even if the application was designed to assume a server is always on a local subnet
and uses broadcast packets (with either the limited broadcast address 255.255.255.255, or a network directed broadcast
address) to reach the server.
You can configure relay entries both globally and on specific routing interfaces. Each relay entry maps an ingress interface
and destination UDP port number to a single IPv4 address (the helper address). You can configure multiple relay entries for
the same interface and UDP port, in which case the relay agent relays matching packets to each server address. Interface
configuration takes priority over global configuration. That is, if a packet's destination UDP port matches any entry on the
ingress interface, the packet is handled according to the interface configuration.
Page 286 Configuring Global and Interface IP Settings
Table 177: IP Interface Configuration Fields (Cont.)
Description
The burned-in physical address of the specified interface. The format is six two-digit
hexadecimal numbers separated by colons, for example 00:06:29:32:81:40. This
value is valid for physical interfaces. For logical interfaces, such as VLAN routing
interfaces, the field displays the system MAC address.
Select the link layer encapsulation type for packets transmitted from the specified
interface from the dropdown menu. The possible values are Ethernet and SNAP. The
default is Ethernet.
Select to Disable or Enable Proxy ARP for the specified interface from the dropdown
menu.
Select to Disable or Enable Local Proxy ARP for the specified interface from the
dropdown menu.
The maximum transmission unit (MTU) size of IP packets sent on an interface. Valid
range is (68 to 9198). Default value is 1500.
The configured bandwidth of the interface is specified in Kbps. If no bandwidth is
configured, the bandwidth defaults to the actual interface bandwidth for port-based
routing interfaces and to 10 Mbps for VLAN routing interfaces. This value does not
affect the actual speed of an interface.
Specifies the mode of sending ICMP Destination Unreachables on this interface. If this
is disabled, then this interface will not send ICMP Destination Unreachables. By
default, the Destination Unreachables mode is Enable.
The router sends an ICMP Redirect on an interface only if Redirects are enabled both
globally and on the interface. By default, the ICMP Redirects mode is Enable.
Software User Manual
Document 34CSFP6XXUWS-SWUM100-D7
12/10/09