The document outlines the configuration of floating static routes on Juniper routers R1 and R2, detailing the necessary IP addresses and commands for establishing connectivity between them. It explains how to set main and backup routes, including adjusting preferences for redundancy and failover scenarios. The configuration allows R1 to ping R2's loopback address while managing inactive routes if the primary connection fails.

1. JUNIPER JNCI
JUNIPER FLOATING STATIC ROUTE CONFIGURATION
A S M E D U C AT I O N A L C E N T E R I N C . ( A S M )
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2. JUNIPER FLOATING STATIC ROUTE CONFIGURATION

3. JUNIPER FLOATING STATIC ROUTE CONFIGURATION
In here R1 and R2 are connected via two cables
e1 to e1 is 10.10.10.1/24
10.10.10.2/24
e3 to e3 is 40.40.40.1/24
40.40.40.2/24
Goal is to that R1 will be able go to Loopback address of R2=2.2.2.2 via Link e1=10.10.10.1
Here I will give IP address to R1 em1 , em3 and Lo0
root@R1# set interfaces em1 unit 0 family inet address 10.10.10.1/24
root@R1# set interfaces em3 unit 0 family inet address 40.40.40.1/24
root@R1# set interfaces lo0 unit 0 family inet address 1.1.1.1/24
Here are R1 Configuration

4. JUNIPER FLOATING STATIC ROUTE CONFIGURATION
root@R1> show configuration
em1 {
unit 0 {
family inet {
address 10.10.10.1/24;
}
}
}
em3 {
unit 0 {
family inet {
address 40.40.40.1/24;
}
}
}
lo0 {
unit 0 {
family inet {
address 1.1.1.1/24;
}
}
}
}

5. JUNIPER FLOATING STATIC ROUTE CONFIGURATION
Here I will give IP address to R2 em1 ,em2 , em3 and Lo0
root@R2# set interfaces em1 unit 0 family inet address 10.10.10.2/24
root@R2# set interfaces em3 unit 0 family inet address 40.40.40.2/24
root@R2# set interfaces lo0 unit 0 family inet address 2.2.2.2/24
root@R2# show interfaces
em1 {
unit 0 {
family inet {
address 10.10.10.2/24;
}
}
}
em2 {
unit 0 {
family inet {
address 20.20.20.2/24;
}
}
}

6. JUNIPER FLOATING STATIC ROUTE CONFIGURATION
em3 {
unit 0 {
family inet {
address 40.40.40.2/24;
}
}
}
lo0 {
unit 0 {
family inet {
address 2.2.2.2/24;
}
}
}
[edit]
root@R2#
Now In order R1 be able to Ping 2.2.2.2 using the Link e1 (that is next hop is 10.10.10.2) we need to use the commands: qualified-next-
hop 10.10.10.2 preference 25 (remember the default preference for Static route=5) so I want other link to have a higher Preference

7. JUNIPER FLOATING STATIC ROUTE CONFIGURATION
Here I will do the Static Route On R1
root@R1# set routing-options static route 2.2.2.0/24 next-hop 10.10.10.2
root@R1# set routing-options static route 2.2.2.0/24 qualified-next-hop 40.40.40.2 preference 25
so above line means I go to Loopback 2.2.2.2 via next hop=10.10.10.1 ( as main route , since the default preference =5,
and it is lower than 25)
Here is another show commands on R1
root@R1# show routing-options
static {
route 2.2.2.0/24 {
next-hop 10.10.10.2;
qualified-next-hop 40.40.40.2 {
preference 25;
}
}
}

8. JUNIPER FLOATING STATIC ROUTE CONFIGURATION
Here is my routing table for R1
root@R1> show route protocol static
inet.0: 7 destinations, 8 routes (7 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
2.2.2.0/24 *[Static/5] 00:01:45
> to 10.10.10.2 via em1.0
[Static/25] 00:09:07
> to 40.40.40.2 via em3.0
The asterisks (*) in the routing tables show the active routes. The backup routes are listed next.
Since R2 has a static back to R1 ; I will be able ping 2.2.2.2
Now I will do the Static Route on R2
root@R2# set routing-options static route 1.1.1.0/24 next-hop 10.10.10.1

9. JUNIPER FLOATING STATIC ROUTE CONFIGURATION
Here is R2 information:
root@R2# show routing-options
static {
route 1.1.1.0/24 next-hop 10.10.10.1;
Now I can ping from R1 to 2.2.2.2
root@R1> ping 2.2.2.2
PING 2.2.2.2 (2.2.2.2): 56 data bytes
64 bytes from 2.2.2.2: icmp_seq=0 ttl=64 time=0.440 ms
64 bytes from 2.2.2.2: icmp_seq=1 ttl=64 time=0.454 ms
64 bytes from 2.2.2.2: icmp_seq=2 ttl=64 time=0.895 ms
64 bytes from 2.2.2.2: icmp_seq=3 ttl=64 time=0.832 ms
64 bytes from 2.2.2.2: icmp_seq=4 ttl=64 time=0.768 ms
Making Sure That the Backup Route Becomes the Active Route

10. JUNIPER FLOATING STATIC ROUTE CONFIGURATION
If the primary route becomes not available, I need to make sure that the backup secondary route becomes active.
So Now what I will do , I will disable the active route by deactivating the em1 interface on R1, and test it with ping
root@R1# deactivate interfaces em1 unit 0 family inet address 10.10.10.1/24
So here is my show interface on R1 now
root@R1# show interfaces
em1 {
unit 0 {
family inet {
inactive: address 10.10.10.1/24;
}
}
}
em3 {
unit 0 {
family inet {
address 40.40.40.1/24;
}
}
}
lo0 {
unit 0 {
family inet {
address 1.1.1.1/24;
}
}
}

11. JUNIPER FLOATING STATIC ROUTE CONFIGURATION
As we see from above this has been deactivated for em1 , now according this commands I should be able ping 2.2.2.2 via 40.40.40.2
root@R1# show routing-options
static {
route 2.2.2.0/24 {
next-hop 10.10.10.2;
qualified-next-hop 40.40.40.2 {
preference 25;
}
}
}
But let’s look at routing table in R1#
root@R1> show route protocol static
inet.0: 5 destinations, 5 routes (5 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
2.2.2.0/24 *[Static/25] 01:10:58
> to 40.40.40.2 via em3.0
root@R1>

12. JUNIPER FLOATING STATIC ROUTE CONFIGURATION
Here in above we see that R1 will go to 2.2.2.2 via 40.40.40.2
root@R1> ping 2.2.2.2
PING 2.2.2.2 (2.2.2.2): 56 data bytes
64 bytes from 2.2.2.2: icmp_seq=0 ttl=64 time=0.583 ms
64 bytes from 2.2.2.2: icmp_seq=1 ttl=64 time=0.530 ms
64 bytes from 2.2.2.2: icmp_seq=2 ttl=64 time=0.576 ms
64 bytes from 2.2.2.2: icmp_seq=3 ttl=64 time=0.499 ms
So in Summary; for the Floating static route you need to have these commands:
root@R1# set routing-options static route 2.2.2.0/24 next-hop 10.10.10.2
root@R1# set routing-options static route 2.2.2.0/24 qualified-next-hop 40.40.40.2 preference 25
lets activate the interface em1
root@R1# activate interfaces em1 unit 0 family inet address 10.10.10.1/24
Here is my routing table which is back to normal;
root@R1> show route protocol static
inet.0: 7 destinations, 8 routes (7 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
2.2.2.0/24 *[Static/5] 00:00:37
> to 10.10.10.2 via em1.0
[Static/25] 01:15:31
> to 40.40.40.2 via em3.0

13. A S M E D U C AT I O N A L C E N T E R I N C . ( A S M )
WHERETRAINING,TECHNOLOGY&SERVICECONVERGE
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