wr erase
config replace nvram:startup
conf t
no vlan 2-1000
This one is a no-brainer, but I only started using it today (I was either manually deleting each vlan with “no vlan x” or deleting the vlan.dat and reloading the router):
So simple:sw1(config)#no vlan 2-1000Verify that VLANs (2-1000) are gone:sw1(config)#do sh vlan brVLAN Name Status Ports
—- ——————————– ——— ——————————-
1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4
Fa0/5, Fa0/6, Fa0/7, Fa0/8
Fa0/9, Fa0/10, Fa0/11, Fa0/12
Fa0/16, Fa0/17, Fa0/18, Fa0/19
Fa0/20, Fa0/21, Fa0/22, Fa0/23
Fa0/24, Fa0/25, Fa0/26, Fa0/27
Fa0/28, Fa0/29, Fa0/30, Fa0/31
Fa0/32, Fa0/33, Fa0/34, Fa0/35
Fa0/36, Fa0/37, Fa0/38, Fa0/39
Fa0/40, Fa0/41, Fa0/42, Fa0/43
Fa0/44, Fa0/45, Fa0/46, Fa0/47
Fa0/48, Gi0/1, Gi0/2, Gi0/3
Gi0/4
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
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