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Chapter 5 Avaya P460 Layer 3 Features
58 Avaya P460 Configuration Guide
NetBIOS Re-broadcast Configuration
NetBIOS Overview
Short for Network Basic Input Output System, an application programming
interface (API) that augments the DOS BIOS by adding special functions for local-
area networks (LANs). Almost all LANs for PCs are based on the NetBIOS. Some
LAN manufacturers have even extended it, adding additional network capabilities.
The Avaya P460 can be configured to relay netbios UDP broadcast packets. This
feature is used for applications such as WINS that use broadcast but might need to
communicate with stations on other subnetworks or VLANs.
Configuration is performed on a per-interface basis. A netbios broadcast packet
arrives from an interface on which netbios rebroadcast is enabled. The packet is
distributed to all other interfaces configured to rebroadcast netbios.
If the netbios packet is a net-directed broadcast, for example, 149.49.255.255, the
packet is relayed to all other interfaces on the list, and the IP destination of the
packet is replaced by the appropriate interface broadcast address.
If the netbios broadcast packet is a limited broadcast, for example, 255.255.255.255, it
is relayed to all VLANs on which there are netbios-enabled interfaces. In that case,
the destination IP address remains the limited broadcast address.
NetBIOS Re-broadcast Configuration CLI Commands
In order to... Use the following command...
Set NetBIOS rebroadcasts mode on
an interface
ip netbios-rebroadcast
Disable NetBIOS rebroadcasts
mode on an interface
no ip netbios-rebroadcast