Avaya P333R, User Manual

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Chapter 1 Overview
Avaya P333R User’s Guide
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redistribution of static routes to OSPF. In addition, P333R lets the user configure, on
a per static route basis, whether the route is to be redistributed to RIP and OSPF,
and what metric (in the range of 1-15). The default state is to enable the route to be
redistributed at metric 1. When static routes are redistributed to OSPF, they are
always redistributed as external type 2.
Route Preferences
The routing table may contain routes from different sources. Routes to a certain
destination may be learned independently from RIP and from OSPF, and at the
same time, a static route can also be configured to the same destination. While
metrics are used to choose between routes of the same protocol, protocol
preferences are used to choose between routes of different protocols.
The preferences only apply to routes for the same destination IP address and mask.
They do not override the longest-match choice. For example, a high-preference
static default route will not be preferred over a RIP route to the subnet of the
destination.
P333R protocol preferences are listed below from the most to the least preferred:
1
Local (directly attached net)
2 High-preference static (manually configured routes)
3 OSPF internal routes
4 RIP
5 OSPF external routes
6 Low-preference static (manually configured routes).
Netbios Rebroadcast
The Avaya P333R can be configured to relay netbios UDP broadcast packets. This
feature is used for applications such as WINS that use broadcast but may need to
communicate with stations on other subnets or VLANs.
Configuration is performed on a per-interface basis. When 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 (e.g., 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 (e.g., 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.