Fujitsu Siemens Computers PRIMERGY BX, Description

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Features of the Switch Introduction
Lan Switch and Router Blade
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DNS and DNS Relay
The
DNS
protocol controls the
Domain Name System (DNS)
, a distributed database with
which you can map host names to IP addresses. When you configure DNS on your switch, you
can substitute the host name for the IP address with all IP commands, such as
ping, telnet,
traceroute,
and related Telnet support operations.
To keep track of domain names, IP has defined the concept of a domain name server,
which holds a cache (or database) of names mapped to IP addresses. To map domain names
to IP addresses, you must first identify the host names, specify the name server that is present
on your network, and enable the DNS.
DNS relay
acts as a forwarder between the DNS Clients and the DNS Servers.
PRIMERGY BX600 DNS Relay designed for home/office users that don’t need to know name
server also can access to Internet. Only setting DNS server on client station points toward that
switch.
IP Multinetting
PRIMERGY BX600 support an IP Multinetting function. It is the process of configuring
more than one IP address on a network interface. IP Multinetting is also synonymously called
IP Aliasing or Secondary Addressing. Typical uses of IP Multinetting are:
Reorganizing servers with no other machine updates.
Virtual hosting of Web and FTP servers
2.1.8 IP Multicast Features
IGMPv3
Internet Group Management Protocol (IGMP) is the multicast group membership
discovery protocol. Three versions of IGMP exist. Versions 1 and 2 are widely deployed. Since
IGMP is used between end systems (often desktops) and the multicast router, the version of
IGMP required depends on the end-user operating system being supported. Any
implementation of IGMP must support all earlier versions.
The following list describes the basic operation of IGMP, common to all versions. A
multicast router can act as both an IGMP host and an IGMP router and as a result can respond
to its own IGMP messages. The PRIMERGY BX600 implementation of IGMPv3 supports the
multicast router portion of the protocol (i.e. not the host portion). It is backward compatible with
IGMPv1 and IGMPv2.
PRIMERGY BX600 IGMPv3 the multicast router function is below:
1. One router periodically broadcasts IGMP Query messages onto the network.
2. Hosts respond to the Query messages by sending IGMP Report messages indicating
their group memberships.
3. All routers receive the Report messages and note the memberships of hosts on the
network.
4. If a router does not receive a Report message for a particular group for a period of
time, the router assumes there are no more members of the group on the network.