Bootp/Dhcp Relay; Dns Relay; Packet Forwarding - Intel ZT 8101 10/100 User Manual

Switch Management and Operating Concepts
SNMP Trap Events (Sheet 2 of 2)
Management
Management
Management
Management
Management
Management
Management
Management
Management
Spanning Tree
Spanning Tree
Spanning Tree
Spanning Tree
Security

BOOTP/DHCP Relay

BOOTP and DHCP allow stations to obtain boot and TCP/IP information dynamically. The relay
agent allows them to obtain this information when the BOOTP/DHCP server is not on the same IP
interface as the end station. You can configure the switch so that the messages are forwarded from
one interface to the appropriate server on another interface.

DNS Relay

The Domain Name System (DNS) is used to map names to IP addresses. DNS relay enables the
switch to act as a DNS cache or proxy. It forwards DNS requests to DNS servers only if it can't
resolve the name from its cache.
If you enable DNS relay on the switch, you can specify a primary and secondary DNS server to
forward requests that the switch cannot resolve. You can also specify that requests destined for
specific DNS servers should be first serviced by looking in the switch's table.

Packet Forwarding

The switch maintains a forwarding table. This table contains the relationship between a destination
MAC or IP address and the Ethernet port or gateway router the destination resides on. This
information is used to forward packets. This reduces the traffic congestion on the network, because
packets, instead of being transmitted to all ports, are transmitted to the destination port only. For
example, if Port 1 receives a packet destined for a station on Port 2, the switch transmits that packet
through Port 2 only, and transmits nothing through the other ports. This process is referred to as
"learning" the network topology.
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Login failed for user Edward through Console
Successful login through Telnet (Username: Edward)
Telnet session timeout (Username: Edward)
Login failed for user Edward through telnet
Configuration saved to flash (Username: Edward)
Upgrade firmware successfully (Username: Edward)
Upgrade firmware unsuccessfully! (Username: Edward)
Download configuration successfully (Username: Edward)
Download configuration unsuccessfully! (Username: Edward)
Topology Change
New Root
Spanning tree protocol is enabled
Spanning tree protocol is disabled
Possible spoofing attack from 00-80-C8-11-22-33 port 1
Intel® NetStructure™ ZT 8101 10/100 Ethernet Switch User's Manual