SRX

Hi Experts 

As I am new to Juniper world, I want know how can configure multiple GRE tunnel interface and multiple loopback interface on Juniper SRX 240.

GRE tunnel problem:

I have tried using unit 0 and 1 as below:

gr-0/0/0 {

unit 0 {
tunnel {
source 193.x.x.x;
destination 193.x.x.x;
}
family inet {
mtu 1400;
address 1.1.1.2/30;
}
}
unit 1 {
tunnel {
source 193.x.x.x;
destination 193.x.x.x;
}
family inet {
address 2.2.2.2/30;
}

after the above configuration, I am uanble to see the gr-0/0/0 unit 1 interface in "show interface terse" and neither ping works on this interface and same happens when I create a seperate GRE interface like gr-0/0/1 

But I can see gr-0/0/0 unit 0 and its working fine... 

Second question: 

How can I created multiple loopback address as I have configured already lo0 but juniper does not allow me create lo1 and If I create unit 0 and 1 then it say as below:

set interfaces lo0 unit 1 family inet address 193.x.x.x/32

Result: 

[edit interfaces lo0]
'unit 1'
if_instance: Multiple loopback interfaces not permitted in master routing instance
error: configuration check-out failed

Your prompt help would highly apperciated....

Regards

Faz

Hi,

Multiple gr-0/0/0 units works fine for me.

Example:

gr-0/0/0 {
    unit 0 {
        tunnel {
            source 192.168.110.1;
            destination 192.168.100.1;
            routing-instance {
                destination 1;
            }
        }
        family inet {
            address 1.2.3.1/24;
        }
    }
    unit 1 {
        tunnel {
            source 192.168.110.1;
            destination 192.168.100.100;
            routing-instance {
                destination 1;
            }
        }
        family inet {
            address 2.3.4.1/24;
        }
    }
}

In my case I have my gr-0/0/0 units in a routing-instance called 1, hence that configuration line under tunnel.

Add both units to a zone, add routes to the other side.

            route 3.4.5.0/24 next-hop gr-0/0/0.0;
            route 4.5.6.0/24 next-hop gr-0/0/0.1;

And do the opposite on the other device.

show interfaces terse:

gr-0/0/0                up    up  
gr-0/0/0.0              up    up   inet     1.2.3.1/24      
gr-0/0/0.1              up    up   inet     2.3.4.1/24      

and ping tests:

adam@second> ping 4.5.6.1 routing-instance 1 detail verbose count 3    
PING 4.5.6.1 (4.5.6.1): 56 data bytes
64 bytes from 4.5.6.1 via gr-0/0/0.1: icmp_seq=0 ttl=64 time=4.073 ms
64 bytes from 4.5.6.1 via gr-0/0/0.1: icmp_seq=1 ttl=64 time=3.913 ms
64 bytes from 4.5.6.1 via gr-0/0/0.1: icmp_seq=2 ttl=64 time=4.077 ms

--- 4.5.6.1 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max/stddev = 3.913/4.021/4.077/0.076 ms

adam@second> ping 3.4.5.1 routing-instance 1 detail verbose count 3    
PING 3.4.5.1 (3.4.5.1): 56 data bytes
64 bytes from 3.4.5.1 via gr-0/0/0.0: icmp_seq=0 ttl=64 time=5.166 ms
64 bytes from 3.4.5.1 via gr-0/0/0.0: icmp_seq=1 ttl=64 time=4.126 ms
64 bytes from 3.4.5.1 via gr-0/0/0.0: icmp_seq=2 ttl=64 time=4.182 ms

On loopback however, you can only have one unit per routing instance, so you could have lo0.0 in master, and lo0.1 in a different one.

Interface config:

lo0 {
    unit 0 {
        family inet {
            address 10.1.0.2/32;
        }
    }
    unit 1 {
        family inet {
            address 10.2.0.2/32;
        }
    }
}

 Add them to different routing instances, commit and you're left with this show interfaces terse:

lo0                     up    up  
lo0.0                   up    up   inet     10.1.0.2            --> 0/0
lo0.1                   up    up   inet     10.2.0.2            --> 0/0