NetBIOS Relays
Page 26-11
NetBIOS Relays
The switch supports a
UDP
relay function that allows Network Basic Input/Output System
(
NetBIOS
) messages to be sent across groups or
VLANs
.
Overview of NetBIOS
NetBIOS
is an applications interface that allows computers on Ethernet or token ring
LANs
to
communicate with one another. An enhanced version of the protocol is used by networking
operating systems such as
LAN
Manager and Windows NT.
With
NetBIOS
, each client and host in the
LAN
has a unique
NetBIOS
name. Stations in a
NetBIOS
network broadcast queries to verify that their names are unique on the
LAN
. Names
may be verified by using the
NetBIOS
Name Server (
NBNS
) protocol, which sends messages to
a well-known
UDP
port (137). Name requests are sent to an
IP
subnet broadcast address or
the unicast address of the server.
The
NetBIOS
protocol also has a datagram service that allows an application to exchange data-
grams with a specific application or to broadcast and receive datagrams on a
VLAN
. A
NetBIOS
Datagram Distribution (
NBDD
) server may be installed in the network to provide this service,
which uses a well-known
UDP
port number (138).
NetBIOS
may be configured to run over
TCP/IP
using the various modes defined in RFC_1001
and RFC_1002. These modes are defined in terms of
nodes
and determine how
NetBIOS
stations (or nodes) in the network register their
NetBIOS
names and resolve (or map) these
names to
IP
addresses. Each
NetBIOS
PC
has a node type. The nodes are defined as follows:
• Broadcast node (b-node)—These nodes use broadcast for name registration and resolu-
tion. Since routers do not forward broadcast traffic, b-node clients in different networks
will not be able to communicate
• Point-to-point node (p-node)—In this environment, each station knows the address of the
server. Unicast queries are sent directly to the name and datagram servers. This method
does not use broadcast.
• Mixed-mode node (m-node)—This mode uses a combination of b-node and p-node.
Содержание Omni Switch/Router
Страница 1: ...Part No 060166 10 Rev C March 2005 Omni Switch Router User Manual Release 4 5 www alcatel com ...
Страница 4: ...page iv ...
Страница 110: ...WAN Modules Page 3 40 ...
Страница 156: ...UI Table Filtering Using Search and Filter Commands Page 4 46 ...
Страница 164: ...Using ZMODEM Page 5 8 ...
Страница 186: ...Displaying and Setting the Swap State Page 6 22 ...
Страница 202: ...Creating a New File System Page 7 16 ...
Страница 270: ...Displaying Secure Access Entries in the MPM Log Page 10 14 ...
Страница 430: ...OmniChannel Page 15 16 ...
Страница 496: ...Configuring Source Route to Transparent Bridging Page 17 48 ...
Страница 542: ...Dissimilar LAN Switching Capabilities Page 18 46 ...
Страница 646: ...Application Example DHCP Policies Page 20 30 ...
Страница 660: ...GMAP Page 21 14 ...
Страница 710: ...Viewing the Virtual Interface of Multicast VLANs Page 23 16 ...
Страница 722: ...Application Example 5 Page 24 12 ...
Страница 788: ...Viewing UDP Relay Statistics Page 26 24 ...
Страница 872: ...The WAN Port Software Menu Page 28 46 ...
Страница 960: ...Deleting a PPP Entity Page 30 22 ...
Страница 978: ...Displaying Link Status Page 31 18 ...
Страница 988: ...Displaying ISDN Configuration Entry Status Page 32 10 ...
Страница 1024: ...Backup Services Commands Page 34 14 ...
Страница 1062: ...Diagnostic Test Cable Schematics Page 36 24 ...
Страница 1072: ...Configuring a Switch with an MPX Page A 10 ...
Страница 1086: ...Page B 14 ...
Страница 1100: ...Page I 14 Index ...