Junos Disable Vs Deactivate Interfaces - Networkers-Online.Com

http://www.networkers-online.com/blog/2016/05/junos-disable-vs-deactivate/

JUNOS Disable vs Deactivate interfaces

Networkers May 9, 2016

Confusing betwixt disabling in addition to deactivating interfaces on JUNOS is a mutual error that leads to all sorts of problems during implementing changes on alive network boxes. Let's expect in addition to clarify the differences quickly.

Disabling an interface:

Disabling an interface inwards JUNOS is equivlaent to interface shutdown inwards Cisco, it is going to accept the interface administratevly downwards completely without impacting the configuration on that interface every bit y'all tin displace encounter below.

--- Interface inwards UP UP the world  triton@neptune> demo interfaces ge-0/0/0 terse  Interface               Admin Link Proto    Local                 Remote  ge-0/0/0                up    upwards  ge-0/0/0.0              up    up   inet     172.18.0.1/24    -- Disable the interface  triton@neptune> configure  triton@neptune# laid upwards interfaces ge-0/0/0 disable    [edit]    -- Interface is taken administratevely down, notice the configuration is nonetheless at that spot indicated past times unit of measurement 0.0    triton@neptune# run demo interfaces ge-0/0/0 terse  Interface               Admin Link Proto    Local                 Remote  ge-0/0/0                down  downwards  ge-0/0/0.0              up    downwards inet     172.18.0.1/24  

Deactivating interfaces' configuration:

Deactivation is a JUNOS characteristic that tin displace survive used amongst whatever configuration block or snippet in addition to non is specifically tied to interfaces. When y'all deactivate a configuration y'all completely withdraw the touching of that configuration every bit if it was deleted without truly deleting it.

--- Interface is inwards UP UP the world  triton@neptune# run demo interfaces ge-0/0/0 terse  Interface               Admin Link Proto    Local                 Remote  ge-0/0/0                up    upwards  ge-0/0/0.0              up    up   inet     172.18.0.1/24    --- Deactivate the configuration  triton@neptune# deactivate interfaces ge-0/0/0    [edit]  triton@neptune# commit    --- Note that the configuration is no longer active, only the interface is nonetheless UP  triton@neptune# run demo interfaces ge-0/0/0 terse  Interface               Admin Link Proto    Local                 Remote  ge-0/0/0                up    upwards  

Key Takeaways

1 Deactivation is a JUNOS characteristic that deactivates configuration snippets in addition to shouldn't survive confused amongst disabling or shutting downwards interfaces. 2 Deactivating configuration on an interface volition withdraw the lawsuit of the configuration without removing it only volition buy the farm along the interface inwards UP the world which tin displace touching routing in addition to other functions for L3 protocols to discovery the changes. 3 Disable statements should survive used to accept interfaces downwards in addition to non deactivation.