Subnet Masks; Next Hop; Multicasting - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - IP-IPV6-IGP CONFIGURATION GUIDE 2010-10-31 Configuration Manual

JunosE 11.3.x IP, IPv6, and IGP Configuration Guide
Example 1
Example 2

Subnet Masks

Next Hop

Multicasting

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neighbors receiving updates or requests. If they do not have this password, the neighbors
reject all updates or requests from the router. MD5 authentication uses a shared key to
encrypt the RIP message. The neighbors must have the MD5 key to decrypt the message
and encrypt a response.
NOTE: Do not use text authentication when security is important, because
the router sends the unencrypted password in every RIP packet it sends.
The following example shows how to use password authentication:
host1(config)#interface fastEthernet 0/0
host1(config-if)#ip rip send version 2
host1(config-if)#ip rip authentication mode text
host1(config-if)#ip rip authentication key ke6G72mV
The following example shows how to use MD5 authentication:
host1(config)#interface fastEthernet 0/0
host1(config-if)#ip rip send version 2
host1(config-if)#ip rip authentication mode md5 8
host1(config-if)#ip rip authentication key sf43nBScE9
The Subnet Mask field of a RIP message contains the subnet mask that is applied to the
IP address to set the nonhost portion of the address. If the subnet mask field in a RIP
message contains a zero, then no subnet mask was included for the entry.
On an interface where a RIPv1 router may hear and operate on information in a RIPv2
routing entry, the following rules apply:
Information internal to one network must never be advertised into another network.
Information about a more specific subnet may not be advertised where RIPv1 routers
would consider it a host route.
Supernet routes (routes where a netmask is less specific than the natural network
mask) must not be advertised where they could be misinterpreted by RIPv1 routers.
The Next Hop field in a RIP message contains the next IP address where a packet is sent.
A value of zero in this field indicates that the next address the packet should be sent to
is the router that originally sent the RIP message.
To reduce unnecessary load on hosts that are not listening to RIPv2 messages, an IP
multicast address is used for periodic broadcast messages. The IP multicast address is
224.0.0.9.
Copyright © 2010, Juniper Networks, Inc.