Added bind_addr parameter in Device() API

[dineshbaburam91]

bind_addr is a (local) source IP address to use, must be reachable from the remote device.

(envname) root@masterhost:~# ping -I 1.1.1.4 x.x.x.x
PING x.x.x.x (x.x.x.x) from 1.1.1.4 : 56(84) bytes of data.
64 bytes from x.x.x.x: icmp_seq=1 ttl=64 time=27.3 ms
64 bytes from x.x.x.x: icmp_seq=2 ttl=64 time=1.20 ms
64 bytes from x.x.x.x: icmp_seq=3 ttl=64 time=1.33 ms


Testcase1: No Bind address configured





(envname) root@masterhost:~# cat sample.py 
from jnpr.junos import Device
from pprint import pprint
dev = Device(host=‘ng1r,’ user='root', password='Embe1mpls')
dev.open()
pprint (dev.facts['hostname'])

O/P:


(envname) root@masterhost:~# python3 sample.py
'ng1r'



Netstat o/p:


root@masterhost:~# netstat -a | grep 830
tcp 0 0 ng1h.englab.junip:53886 ng1r-fxp0.englab.ju:830 ESTABLISHED


Testcase2: When bind address configured as None

(envname) root@masterhost:~# cat sample.py 
from jnpr.junos import Device
from pprint import pprint
dev = Device(host=’ng1r’, bind_addr= None, user='root', password='Embe1mpls')
dev.open()
pprint (dev.facts['hostname'])

O/p:

(envname) root@masterhost:~# python3 sample.py
'ng1r'

Netstat o/p:

root@masterhost:~# netstat -a | grep 830
tcp 0 0 ng1h.englab.junip:45758 ng1r-fxp0.englab.ju:830 ESTABLISHED

Testcase3: When bind_address configured

(envname) root@masterhost:~# cat sample.py 
from jnpr.junos import Device
from pprint import pprint
dev = Device(host=‘ngn1r’, bind_addr= "1.1.1.4", user='root', password='Embe1mpls')
dev.open()
pprint (dev.facts['hostname'])

O/p:

(envname) root@masterhost:~# python3 sample.py
'ng1r'

Netstat o/p:

root@masterhost:~# netstat -a | grep 830
tcp 0 0 1.1.1.4:55351 ng1r-fxp0.englab.ju:830 ESTABLISHED

Unit-test



(envname) root@masterhost:~/dinesh/py-junos-eznc# nose2  tests.unit.test_device
............................................................................................................
----------------------------------------------------------------------
Ran 108 tests in 0.227s

OK

[chidanandpujar]

Looks good