ZyXEL Communications XGS4700 Series, Руководство пользователя

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XGS4700-48F User’s Guide
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H A P T E R
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RIP
This chapter shows you how to configure RIP (Routing Information Protocol).
35.1 RIP Overview
RIP (Routing Information Protocol) allows a routing device to exchange routing
information with other routers. The Direction field controls the sending and
receiving of RIP packets. When set to:
•
Both
- the Switch will broadcast its routing table periodically and incorporate the
RIP information that it receives.
•
Incoming
- the Switch will not send any RIP packets but will accept all RIP
packets received.
•
Outgoing
- the Switch will send out RIP packets but will not accept any RIP
packets received.
•
None
- the Switch will not send any RIP packets and will ignore any RIP packets
received.
The Version field controls the format and the broadcasting method of the RIP
packets that the Switch sends (it recognizes both formats when receiving).
RIP-1
is universally supported; but RIP-2 carries more information.
RIP-1
is probably
adequate for most networks, unless you have an unusual network topology.
Both
RIP-2B
and
RIP-2M
send the routing data in RIP-2 format; the difference
being that
RIP-2B
uses subnet broadcasting while
RIP-2M
uses multicasting.
35.1.1 Administrative Distance
When two or more than two different routing protocols, such as RIP and OSPF
provide multiple routes to the same destination, the Switch can use the
administrative distance of the route to determine which routing protocol to use
and add the route to the routing table.
The lower the administrative distance value is, the more preferable the routing
protocol is. If two routes have the same administrative distance value, the Switch