Introduction:
Command syntax of IOS XR is different than classis cisco IOS .In this document you will learn about “commit replace” command use in IOS XR.
As you know “write erase” command uses in IOS to wipe out entire configuration, similarly to wipe out entire running configuration in IOS XR you need to use “commit replace” command.
Configuration Example:
Here is a running configuration I have in router running IOS XR.
RP/0/0/CPU0:PE1#sh run
Sat Nov 23 22:36:27.493 TLT
Building configuration...
!! IOS XR Configuration 0.0.0
!! Last configuration change at Sat Nov 23 22:30:37 2013 by
!
hostname PE1
logging console debugging
service timestamps
interface Loopback0
ipv4 address 1.1.1.1 255.255.255.255
!
interface GigabitEthernet0/0/0/0
shutdown
!
interface GigabitEthernet0/0/0/1
ipv4 address 10.1.1.1 255.255.255.252
!
interface GigabitEthernet0/0/0/2
shutdown
!
interface GigabitEthernet0/0/0/3
shutdown
!
interface GigabitEthernet0/0/0/4
mtu 1514
l2transport
!
router ospf 100
router-id 1.1.1.1
area 0
mpls ldp auto-config
interface Loopback0
!
interface GigabitEthernet0/0/0/1
!
l2vpn
!
pw-class ETH_TO_PPP
encapsulation mpls
!
xconnect group GRP1
p2p GRP2
interface GigabitEthernet0/0/0/4
neighbor 2.2.2.2 pw-id 200
pw-class ETH_TO_PPP
!
interworking ipv4
!
mpls ldp
router-id 1.1.1.1
interface GigabitEthernet0/0/0/1
!
end
RP/0/0/CPU0:PE1#
Now to erase entire configuration you need to use “commit replace” command:
RP/0/0/CPU0:PE1#
RP/0/0/CPU0:PE1#conf t
Sat Nov 23 23:01:30.350 TLT
RP/0/0/CPU0:PE1(config)#commit replace
Sat Nov 23 23:01:39.447 TLT
This commit will replace or remove the entire running configuration. This
operation can be service affecting.
Do you wish to proceed? [no]: yes
RP/0/0/CPU0:ios(config)#exit
Now let’s see what we have in running configuration:
RP/0/0/CPU0:ios#sh run
Sat Nov 23 23:01:55.075 TLT
Building configuration...
!! IOS XR Configuration 0.0.0
!! Last configuration change at Sat Nov 23 23:01:45 2013 by UNKNOWN
!
end
RP/0/0/CPU0:ios#
You can see all configuration has been wipe out.
Please read more about “commit” commands in command reference before you apply any command on live router
Source Information:
Qestion about clear configuration under IOS XR
ERASE START UP CONFIG XR
