Junos OS

Hello !

How can I correctly set multiple loopback interfaces in Junos routing-instance.(imitation of the subnet)

I have tried differently , but always error output appear.

[edit interfaces lo0]
'unit 2'
if_instance: Multiple loopback interfaces not permitted in GI routing instance
error: configuration check-out failed

Hello there,

Please see below:

set interfaces lo0.2 family inet address 198.18.1.1/24
set interfaces lo0.2 family inet address 198.18.2.1/24
set routing-instances GI interfaces lo0.2

If You need 2 addresses from same subnet, use shorter mask just once:

set interfaces lo0.2 family inet address 203.0.113.1/32
set interfaces lo0.2 family inet address 203.0.113.2/24
set routing-instances GI interfaces lo0.2

HTH

Thanks
Alex

Hello,  aarseniev!

Actually, I do that too! How do you propose.

But it is impossible to ping with second address ( with this configuration)

Juniper-1
[edit interfaces lo0 unit 1]
root# show
family inet {
address 175.25.75.249/29;
address 175.25.75.250/29;
}

Juniper-2
[edit routing-options]
root# show
static {
route 175.25.75.248/29 next-hop 192.168.100.253;
 }

root# run ping 175.25.75.249
PING 175.25.75.249 (175.25.75.249): 56 data bytes
64 bytes from 175.25.75.249: icmp_seq=0 ttl=64 time=56.568 ms

[edit routing-options]
root# run ping 175.25.75.250
PING 175.25.75.250 (175.25.75.250): 56 data bytes
^C
--- 175.25.75.250 ping statistics ---
3 packets transmitted, 0 packets received, 100% packet loss

Hello there,

---

@vlazarev wrote:

Hello,  aarseniev!

 

Actually, I do that too! How do you propose.

But it is impossible to ping with second address ( with this configuration)

 

Juniper-1
[edit interfaces lo0 unit 1]
root# show
family inet {
address 175.25.75.249/29;
address 175.25.75.250/29;
}

 

 

 

Juniper-2
[edit routing-options]
root# show
static {
route 175.25.75.248/29 next-hop 192.168.100.253;
 }

 

 

---

Please try the following and report back:

[edit interfaces lo0 unit 1]
root# show 
family inet {
address 175.25.75.249/32;
address 175.25.75.250/29;
}

HTH

Thanks
Alex

Thank you for idea to use prefix /32.

every host from subnet 175.25.75.248/29 should be assigned addresses with prefix /32