Interoperability of RIPv1 and RIPv2 Networks
Understanding the Sending and Receiving of RIPv1 and RIPv2 Packets
RIP version 1 (RIPv1) and RIP version 2 (RIPv2) can run simultaneously. This might make sense when you are migrating a RIPv1 network to a RIPv2 network. This also allows interoperation with a device that supports RIPv1 but not RIPv2.
By default, when RIP is enabled on an interface, Junos OS receives
both RIPv1 and RIPv2 packets and sends only RIPv2 packets. You can
configure this behavior by including the send and receive statements in the RIP configuration.Note that the functionality of configuring the sending
and receiving of RIPv1 and RIPv2 packets described in this topic is
not supported in Junos OS Releases 15.1X49, 15.1X49-D30, or 15.1X49-D40.
Example: Configuring the Sending and Receiving of RIPv1 and RIPv2 Packets
This example shows how to configure whether the RIP update messages conform to RIP version 1 (RIPv1) only, to RIP version 2 (RIPv2) only, or to both versions. You can also disable the sending or receiving of update messages.
Requirements
No special configuration beyond device initialization is required before configuring this example.
Overview
By default, when RIP is enabled on an interface, Junos OS receives both RIPv1 and RIPv2 packets and sends only RIPv2 packets.
Figure 1 shows the topology used in this example.
In this example, Device R1 is configured to receive only RIPv2 packets.
CLI Quick Configuration shows the configuration for all of the devices in Figure 1. The section #d24e63__d24e187 describes the steps on Device R1.
Topology
Configuration
Procedure
CLI Quick Configuration
To quickly configure
this example, copy the following commands, paste them into a text
file, remove any line breaks, change any details necessary to match
your network configuration, copy and paste the commands into the CLI
at the [edit] hierarchy level, and then enter commit from configuration mode.
Device R1
set interfaces fe-1/2/0 unit 1 family inet address 10.0.0.1/30 set interfaces lo0 unit 1 family inet address 172.16.0.1/32 set interfaces lo0 unit 1 family inet address 192.168.1.1/32 set protocols rip group rip-group export advertise-routes-through-rip set protocols rip group rip-group neighbor fe-1/2/0.1 receive version-2 set policy-options policy-statement advertise-routes-through-rip term 1 from protocol direct set policy-options policy-statement advertise-routes-through-rip term 1 from protocol rip set policy-options policy-statement advertise-routes-through-rip term 1 then accept
Device R2
set interfaces fe-1/2/0 unit 2 family inet address 10.0.0.2/30 set interfaces fe-1/2/1 unit 5 family inet address 10.0.0.5/30 set interfaces lo0 unit 2 family inet address 192.168.2.2/32 set interfaces lo0 unit 2 family inet address 172.16.2.2/32 set protocols rip group rip-group export advertise-routes-through-rip set protocols rip group rip-group neighbor fe-1/2/0.2 set protocols rip group rip-group neighbor fe-1/2/1.5 set policy-options policy-statement advertise-routes-through-rip term 1 from protocol direct set policy-options policy-statement advertise-routes-through-rip term 1 from protocol rip set policy-options policy-statement advertise-routes-through-rip term 1 then accept
Device R3
set interfaces fe-1/2/0 unit 6 family inet address 10.0.0.6/30 set interfaces lo0 unit 3 family inet address 192.168.3.3/32 set interfaces lo0 unit 3 family inet address 172.16.3.3/32 set protocols rip group rip-group export advertise-routes-through-rip set protocols rip group rip-group neighbor fe-1/2/0.6 set policy-options policy-statement advertise-routes-through-rip term 1 from protocol direct set policy-options policy-statement advertise-routes-through-rip term 1 from protocol rip set policy-options policy-statement advertise-routes-through-rip term 1 then accept
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy. For information about navigating the CLI, see Using the CLI Editor in Configuration Mode in the CLI User Guide.
To configure a RIP packet versions that can be received:
Configure the network interfaces.
[edit interfaces] user@R1# set fe-1/2/0 unit 1 family inet address 10.0.0.1/30 user@R1# set lo0 unit 1 family inet address 172.16.0.1/32 user@R1# set lo0 unit 1 family inet address 192.168.1.1/32
Create the RIP groups and add the interfaces.
To configure RIP in Junos OS, you must configure one or more groups that contain the interfaces on which RIP is enabled. You do not need to enable RIP on the loopback interface.
For the interface that is facing Device R2, the receive version-2 setting causes this interface to accept only RIPv2 packets.
[edit protocols rip group rip-group] user@R1# set neighbor fe-1/2/0.1 receive version-2
Create the routing policy to advertise both direct and RIP-learned routes.
[edit policy-options policy-statement advertise-routes-through-rip term 1] user@R1# set from protocol direct user@R1# set from protocol rip user@R1# set then accept
Apply the routing policy.
In Junos OS, you can only apply RIP export policies at the group level.
[edit protocols rip group rip-group] user@R1# set export advertise-routes-through-rip
Results
From configuration mode, confirm your configuration
by entering the show interfaces, show protocols, and show policy-options commands. If the output does
not display the intended configuration, repeat the configuration instructions
in this example to correct it.
user@R1# show interfaces
fe-1/2/0 {
unit 1 {
family inet {
address 10.0.0.1/30;
}
}
}
lo0 {
unit 1 {
family inet {
address 172.16.0.1/32;
address 192.168.1.1/32;
}
}
}
user@R1# show protocols
rip {
group rip-group {
export advertise-routes-through-rip;
neighbor fe-1/2/0.1 {
receive version-2;
}
}
}
user@R1# show policy-options
policy-statement advertise-routes-through-rip {
term 1 {
from protocol [ direct rip ];
then accept;
}
}
If you are done configuring the device, enter commit from configuration mode.
Verification
Confirm that the configuration is working properly.
Verifying That the Receive Mode Is Set to RIPv2 Only
Purpose
Make sure that the interfacing Device R2 is configured to receive only RIPv2 packets, instead of both RIPv1 and RIPv2 packets.Starting in Junos OS Release 19.3R1, Junos OS supports RIP version 2 (RIPv2) for both IPv4 and IPv6 packets on ACX5448 Universal Metro routers.
Action
From operational mode, enter the show rip neighbor command.
user@R1> show rip neighbor
Local Source Destination Send Receive In
Neighbor State Address Address Mode Mode Met
-------- ----- ------- ----------- ---- ------- ---
fe-1/2/0.1 Up 10.0.0.1 224.0.0.9 mcast v2 only 1
Meaning
In the output, the Receive Mode field displays v2 only. The default Receive Mode is both.
Change History Table
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