Viewing the differences between a running configuration and a backup configuration

Prerequisites

Use the cfg-restore {flash | tftp | sftp} <FILE-NAME> diff command to view the list of configuration changes that are removed, modified, or added to the running configuration.

Procedure

Execute the show running-config command to show the running configuration of the switch.

switch(config)# show running-config

Running configuration:

; JL255A Configuration Editor;
; Ver #12:08.1d.9b.3f.bf.bb.ef.7c.59.fc.6b.fb.9f.fc.ff.ff.37.ef:ba
hostname "switch"
module 1 type jl255a
snmp-server community "public" unrestricted
vlan 1
   name "DEFAULT_VLAN"
   no untagged 11-13,15-18
   untagged 1-10,14,19-28
   ip address dhcp-bootp
   exit
vlan 100
   name "VLAN100"
   untagged 11-13
   no ip address
   exit
vlan 300
   name "VLAN300"
   untagged 15-18
   no ip address
   exit

Execute the show config golden_config command to show the backup configuration of the switch.

switch(config)# show config golden_config
; JL255A Configuration Editor;
; Ver #12:08.1d.9b.3f.bf.bb.ef.7c.59.fc.6b.fb.9f.fc.ff.ff.37.ef:ba
hostname "switch"
module 1 type jl255a
; JL255A Configuration Editor;
; Ver #12:08.1d.9b.3f.bf.bb.ef.7c.59.fc.6b.fb.9f.fc.ff.ff.37.ef:ba
hostname "switch"
module 1 type jl255a

Execute the cfg-restore flash golden_config diff command to view the differences that will be applied.

switch# cfg-restore flash golden_config diff 

Configuration delete list:

vlan 1
   no untagged 11-13,15-18
   untagged 3-10
   exit
vlan 100
   untagged 11-13
   exit
vlan 300
   name "VLAN300"

   untagged 15-18
   no ip address
   exit

Configuration add list:

vlan 1
   no untagged 3-10
   untagged 11-13,15-18
   exit
vlan 100
   untagged 3-5
   exit
vlan 200
   name "VLAN200"
   untagged 6-10
   no ip address
   exit

NOTE:

If the running and the backup configuration is the same, no difference will be displayed.

switch(config)# cfg-restore flash modify diff

Current config and backup config is identical.

Execute the show cfg restore latest-diff command to display the difference between the running and the backup configuration.

switch(config)# show cfg-restore
 latest-diff           Shows the difference between running and back-up
                       configuration.
 status                Show configuration restoration status.

switch(config)# show cfg-restore latest-diff

Configuration delete list:

ip default-gateway 172.20.0.1
vlan 100
   name "VLAN100"
   no ip address
   exit

Configuration add list:

vlan 10
   name "VLAN10"
   no ip address
   exit

switch(config)#