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ktbyers / netmiko

Multi-vendor library to simplify Paramiko SSH connections to network devices
MIT License
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Show command no output #1320

Closed erick-abreu closed 5 years ago

erick-abreu commented 5 years ago

Hi im having trouble trying to read show commands outputs from netmiko, when i do a send command, and try to print the result, it comes with no output.

output = iosxr.send_command_expect('show run')
print(output)

I get this output:

>>> 0/CPU0:iosxr#

Some times i get the desiring result, but then stops working.

In the log file i see the result but not printed:

DEBUG:netmiko:read_channel: 

RP/0/RP0/CPU0:iosxr#
DEBUG:netmiko:read_channel: 
DEBUG:netmiko:read_channel: 

RP/0/RP0/CPU0:iosxr#

RP/0/RP0/CPU0:iosxr#

RP/0/RP0/CPU0:iosxr#

RP/0/RP0/CPU0:iosxr#
DEBUG:netmiko:write_channel: show run

DEBUG:netmiko:read_channel: 
DEBUG:netmiko:read_channel: show run

DEBUG:netmiko:read_channel: Tue Aug  6 21:12:54.512 UTC

DEBUG:netmiko:read_channel: Building configuration...
!! IOS XR Configuration version = 6.5.2
!! Last configuration change at Tue Aug  6 21:10:28 2019 by admin
!
hostname iosxr
domain name abc.inc
username admin
 group root-lr
 group cisco-support
 secret 5 $1$k7Sg$3/RgUwUsA2x74RY0mwVlH1
!
tpa
 vrf default
  address-family ipv4
   default-route mgmt
  !
 !
!
line console

Thanks in advance.

carlmontanari commented 5 years ago

Since the logs look normal probably going to need a bit more to go on here to figure out what's up. To start, what version of Netmiko are you running? Can you post your script/repl and (more/full) output from the repl or script where you're seeing the behavior and if possible the log from that same time -- and the log past where the show run output is coming in -- so we can hopefully see whats going on.

erick-abreu commented 5 years ago

This is my full script

from netmiko import ConnectHandler

iosxr = ConnectHandler(host='sbx-iosxr-mgmt.cisco.com',
                       port = '8181',
                       username='admin',
                       password='C1sco12345',
                       device_type='cisco_xr')

#Sends a command to the device 'show run'
output = iosxr.send_command_expect('show run')
print(output)

When i print the output, some times it prints the result, and other times it just print some of the output, like the first line of the full reply.

>>> 0/CPU0:iosxr#

RP/0/RP0/CPU0:iosxr#

RP/0/RP0/CPU0:iosxr#show run

Wed Aug  7 00:12:36.891 UTC

From that output 00:12:36, i can see i got the configuration, but was not shown

DEBUG:netmiko:read_channel: RP/0/RP0/CPU0:iosxr#
DEBUG:netmiko:read_channel: 
DEBUG:netmiko:read_channel: 

RP/0/RP0/CPU0:iosxr#

RP/0/RP0/CPU0:iosxr#
DEBUG:netmiko:write_channel: show run

DEBUG:netmiko:read_channel: 
DEBUG:netmiko:read_channel: 
DEBUG:netmiko:read_channel: 

RP/0/RP0/CPU0:iosxr#

RP/0/RP0/CPU0:iosxr#

RP/0/RP0/CPU0:iosxr#show run

Wed Aug  7 00:12:36.891 UTC

DEBUG:netmiko:read_channel: Building configuration...
!! IOS XR Configuration version = 6.5.2
!! Last configuration change at Wed Aug  7 00:10:24 2019 by admin
!
hostname iosxr
domain name abc.inc
username admin
 group root-lr
 group cisco-support
 secret 5 $1$k7Sg$3/RgUwUsA2x74RY0mwVlH1
!
tpa
 vrf default
  address-family ipv4
   default-route mgmt
  !
 !
!
line console
 exec-timeout 0 0
 absolute-timeout 0
 session-timeout 0
!
line default
 exec-timeout 0 0
 absolute-timeout 0
 session-timeout 0
 transport input ssh
!
call-home
 service active
 contact smart-licensing
 profile CiscoTAC-1
  active
  destination transport-method http
 !
!
interface MgmtEth0/RP0/CPU0/0
 ipv4 address 10.10.20.175 255.255.255.0
 ipv4 address 10.10.20.100 255.255.255.0 secondary
 ipv4 address 192.168.0.1 255.255.255.0 secondary
!
interface GigabitEthernet0/0/0/0
 ipv6 enable
!
interface GigabitEthernet0/0/0/1
 ipv6 enable
!
interface GigabitEthernet0/0/0/2
 ipv6 enable
!
interface GigabitEthernet0/0/0/3
 ipv6 enable
!
interface GigabitEthernet0/0/0/4
 ipv6 enable
!
interface GigabitEthernet0/0/0/5
 ipv6 enable
!
interface GigabitEthernet0/0/0/6
 ipv6 enable
!
router static
 address-family ipv4 unicast
  0.0.0.0/0 10.10.20.254
 !
!
netconf agent tty
!
netconf-yang agent
 ssh
!
ssh server v2
ssh server vrf default
ssh server netconf vrf default
end

RP/0/RP0/CPU0:iosxr#
DEBUG:netmiko:write_channel: 

DEBUG:netmiko:read_channel: 
DEBUG:netmiko:read_channel: 
DEBUG:netmiko:write_channel: 

DEBUG:netmiko:read_channel: 
DEBUG:netmiko:write_channel: 

DEBUG:netmiko:read_channel: 

DEBUG:netmiko:write_channel: 

DEBUG:netmiko:read_channel: 
DEBUG:netmiko:write_channel: 

DEBUG:netmiko:read_channel: RP/0/RP0/CPU0:iosxr#
DEBUG:netmiko:read_channel: 
DEBUG:netmiko:read_channel: 

RP/0/RP0/CPU0:iosxr#

RP/0/RP0/CPU0:iosxr#
DEBUG:netmiko:write_channel: show run

DEBUG:netmiko:read_channel: 
DEBUG:netmiko:read_channel: 

RP/0/RP0/CPU0:iosxr#

RP/0/RP0/CPU0:iosxr#
DEBUG:netmiko:read_channel: show run

Wed Aug  7 00:12:40.687 UTC
Building configuration...
!! IOS XR Configuration version = 6.5.2
!! Last configuration change at Wed Aug  7 00:10:24 2019 by admin
!
hostname iosxr
domain name abc.inc
username admin
 group root-lr
 group cisco-support
 secret 5 $1$k7Sg$3/RgUwUsA2x74RY0mwVlH1
!
tpa
 vrf default
carlmontanari commented 5 years ago

Can you try adding the following to your connect handler:

global_delay_factor=4

XR tends to be pretty slow so we may need to slow Netmiko down as well. I would expect to see some errors/exceptions though so that's a bit strange. Give that a go and let us know if it helps!

erick-abreu commented 5 years ago

Nice @carlniger !! works like a charm! thanks a lot