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Chapter 1 Overview
12 P332G-ML User’s Guide
By default, the P332G-ML does not redistribute routes between OSPF and RIP.
Redistribution from one protocol to the other can be configured. Static routes are, by
default, redistributed to RIP and OSPF. P332G-ML allows the user to globally
disable redistribution of static routes to RIP, and separately to globally disable
redistribution of static routes to OSPF. In addition, P332G-ML 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.
P332G-ML 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
4RIP
5 OSPF external routes
6 Low-preference static (manually configured routes).
Netbios Rebroadcast
The P332G-ML 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