Configuring the Interfaces on Junos Router.

Scenario 1

Part 1:Configure the Interfaces.

a.IPv4 Addressing.

Since i’m working on junos-Olive platform,you will see em interfaces which i guess stands for emulator interfaces.As the Qemu machines got booted,i got the prompt at root level.

As i logged in for the very first time,i must assign the router,a hostname and also a password.

root@Delhi# show | compare rollback 1

[edit system]

+ host-name Delhi;

+ root-authentication {

+ encrypted-password “$1$cYiehWzV$qAQC2VsUAGx2hdKAM7qWC/”; ## SECRET-DATA

+ }

I did the procedure for all our Core routers.Please note that ‘rollback’ command is used to undo any changes we have done recently.The ‘compare rollback 1’ outputs the changes we have performed with our last commit.

Next,i configured router Delhi’s interfaces as shown in Pic:

set interfaces em0 vlan-tagging

set interfaces em0 unit 12 vlan-id 12

set interfaces em0 unit 12 family inet address 10.0.12.1/24

set interfaces em1 vlan-tagging

set interfaces em1 unit 14 vlan-id 14

set interfaces em1 unit 14 family inet address 10.0.14.1/24

set interfaces em2 vlan-tagging

set interfaces em2 unit 13 vlan-id 13

set interfaces em2 unit 13 family inet address 10.0.13.1/24

set interfaces lo0 unit 0 family inet address 1.1.1.1/32

I did the procedure for all our remaining Core routers.I Provided the configs for all core routers for this part at the bottom of this page.

#Verification#

Check if all the directly connected interfaces are pinging each other.

root@Mumbai> ping 10.0.23.3

PING 10.0.23.3 (10.0.23.3): 56 data bytes

64 bytes from 10.0.23.3: icmp_seq=0 ttl=64 time=1.319 ms

^C

— 10.0.23.3 ping statistics —

1 packets transmitted, 1 packets received, 0% packet loss

round-trip min/avg/max/stddev = 1.319/1.319/1.319/0.000 ms

root@Mumbai> ping 10.0.24.4

PING 10.0.24.4 (10.0.24.4): 56 data bytes

64 bytes from 10.0.24.4: icmp_seq=0 ttl=64 time=0.781 ms

^C

— 10.0.24.4 ping statistics —

1 packets transmitted, 1 packets received, 0% packet loss

round-trip min/avg/max/stddev = 0.781/0.781/0.781/nan ms

Note:

error1:: Interrupt storm detected on “irq11:”; throttling interrupt source

Impact::i get the above error while doing this lab,but it didnt impacted anything.

eror2:: em2: watchdog timeout — resetting

Impact:: em2 interfaces are not communicating.

Resolution:

-Tried restarting all routers in gns3. No use though.also notices that the other interfaces stopped communicating and dont see any direct learned routes either.

-Tried deleting em2 interfaces and adding em5 in gns3.em5 worked but other interfaces didnt.Rollback’d all config and dropped at once,now all interfaces are working.