I have been noticing a lot lately while doing the INE OSPF labs on their CSR100v's that when I issue the no form of certain commands, the router will not remove the command or worse will only remove a section of it.
For example:
R5#sh run | s router ospf
router ospf 1
area 3 nssa
summary-address 0.0.0.0 0.0.0.0 not-advertise
network 150.1.5.0 0.0.0.255 area 0
network 155.1.0.0 0.0.0.255 area 0
network 155.1.5.0 0.0.0.255 area 3
network 155.1.45.0 0.0.0.255 area 0
network 155.1.58.0 0.0.0.255 area 3
neighbor 155.1.0.4
neighbor 155.1.0.3
neighbor 155.1.0.2
neighbor 155.1.0.1
R5#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R5(config)#router ospf 1
R5(config-router)#no summary-address 0.0.0.0 0.0.0.0 not-advertise
R5(config-router)#do sh run | s router ospf
router ospf 1
area 3 nssa
summary-address 0.0.0.0 0.0.0.0 not-advertise
network 150.1.5.0 0.0.0.255 area 0
network 155.1.0.0 0.0.0.255 area 0
network 155.1.5.0 0.0.0.255 area 3
network 155.1.45.0 0.0.0.255 area 0
network 155.1.58.0 0.0.0.255 area 3
neighbor 155.1.0.4
neighbor 155.1.0.3
neighbor 155.1.0.2
neighbor 155.1.0.1
R5(config-router)#no summary-address 0.0.0.0 0.0.0.0
R5(config-router)#do sh run | s router ospf
router ospf 1
area 3 nssa
network 150.1.5.0 0.0.0.255 area 0
network 155.1.0.0 0.0.0.255 area 0
network 155.1.5.0 0.0.0.255 area 3
network 155.1.45.0 0.0.0.255 area 0
network 155.1.58.0 0.0.0.255 area 3
neighbor 155.1.0.4
neighbor 155.1.0.3
neighbor 155.1.0.2
neighbor 155.1.0.1
I clearly told the router to remove the summary statement but it would not until dropped the option on the end.
Other times with nssa commands in particular, if I use the no form of the command with all the options, the router will just remove the options and not the main command.
Any ideas why this is happening?
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