Broadcast Storms - D-Link DES-3326 User Manual

DES-3326 Layer 3 Fast Ethernet Switch User's Guide
configuration information. IF the lease expires or if a DHCP
server responds with a negative acknowledgement, the client must
release its current configuration, and then return to the initializing
state.
If the DHCP client uses more than one network adapter to connect
to multiple networks, this protocol is followed for each adapter that
the user wants to configure for TCP/IP. Multi-homed systems are
selectively configured for any combination of the system's
interfaces.
When a DHCP-enabled computer is restarted, it sends a message
to the DHCP server with its current configuration information.
The DHCP server either confirms this configuration or sends a
negative reply so that the client must begin the initializing state
again. System startup mignt, therefore, result in a new IP address
for a client computer, but neither the user nor the network
administrator has to take any action in the configuration process.
Before loading TCP/IP with an address acquired from the DHCP
server, DHCP clients check for an IP address conflict by sending an
Address Resolution Protocol (ARP) request containing the address.
If a conflict is found, TCP/IP does not start, and the user receives
an error message. The conflicting address should be removed for
the list of active leases or it should be excluded until the conflict is
identified and resolved.

Broadcast Storms

Broadcast storms consist of broadcast packets that flood and/or are
looped on a network causing noticeable performance degradation
and in extreme cases, network failure. Broadcast storms can be
caused by malfunctioning NICs, bad cable connections and
applications or protocols that generate broadcast traffic, among
others.
Switch Management and Operating Concepts
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