reloading switch

liven

Is the vlan database maintained even if you delete the startup config and reload?

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georgemc

yes

phreak

Yes.

2900-12-1#show vlan
VLAN 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
100 test active
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active

2900-12-1#

2900-12-1#erase start
Erasing the nvram filesystem will remove all files! Continue? [confirm]
[OK]
Erase of nvram: complete
2900-12-1#reload
Proceed with reload? [confirm]

00:02:35: %SYS-5-RELOAD: Reload requested

###############

AFTER ERASE START AND RELOAD....

Switch>enable
Switch#show vlan
VLAN 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
100 test active
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active

Switch#

What you need to do is erase the vlan.dat file out of flash...

Switch#dir flash:
Directory of flash:/

2 -rwx 1810419 Mar 01 1993 00:09:58 c2900xl-c3h2s-mz.120-5.WC12.bin
3 -rwx 8192 Mar 01 1993 00:09:58 e2rb.bin
4 drwx 704 Mar 01 1993 00:10:36 html
16 -rwx 109 Mar 01 1993 00:10:37 info
17 -rwx 109 Mar 01 1993 00:10:37 info.ver
19 -rwx 616 Mar 01 1993 00:01:24 vlan.dat

3612672 bytes total (678400 bytes free)
Switch#

Switch#del flash:/vlan.dat
Delete filename [vlan.dat]?
Delete flash:/vlan.dat? [confirm]
Switch#show flash

Directory of flash:/

2 -rwx 1810419 Mar 01 1993 00:09:58 c2900xl-c3h2s-mz.120-5.WC12.bin
3 -rwx 8192 Mar 01 1993 00:09:58 e2rb.bin
4 drwx 704 Mar 01 1993 00:10:36 html
16 -rwx 109 Mar 01 1993 00:10:37 info
17 -rwx 109 Mar 01 1993 00:10:37 info.ver

3612672 bytes total (679424 bytes free)
Switch#

AFTER ABOVE STEP:

Switch>show vlan
VLAN 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
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active

Switch>

liven

phreak wrote:

Yes.

2900-12-1#show vlan
VLAN 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
100 test active
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active

2900-12-1#

2900-12-1#erase start
Erasing the nvram filesystem will remove all files! Continue? [confirm]
[OK]
Erase of nvram: complete
2900-12-1#reload
Proceed with reload? [confirm]

00:02:35: %SYS-5-RELOAD: Reload requested

###############

AFTER ERASE START AND RELOAD....

Switch>enable
Switch#show vlan
VLAN 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
100 test active
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active

Switch#

What you need to do is erase the vlan.dat file out of flash...

Switch#dir flash:
Directory of flash:/

2 -rwx 1810419 Mar 01 1993 00:09:58 c2900xl-c3h2s-mz.120-5.WC12.bin
3 -rwx 8192 Mar 01 1993 00:09:58 e2rb.bin
4 drwx 704 Mar 01 1993 00:10:36 html
16 -rwx 109 Mar 01 1993 00:10:37 info
17 -rwx 109 Mar 01 1993 00:10:37 info.ver
19 -rwx 616 Mar 01 1993 00:01:24 vlan.dat

3612672 bytes total (678400 bytes free)
Switch#

Switch#del flash:/vlan.dat
Delete filename [vlan.dat]?
Delete flash:/vlan.dat? [confirm]
Switch#show flash

Directory of flash:/

2 -rwx 1810419 Mar 01 1993 00:09:58 c2900xl-c3h2s-mz.120-5.WC12.bin
3 -rwx 8192 Mar 01 1993 00:09:58 e2rb.bin
4 drwx 704 Mar 01 1993 00:10:36 html
16 -rwx 109 Mar 01 1993 00:10:37 info
17 -rwx 109 Mar 01 1993 00:10:37 info.ver

3612672 bytes total (679424 bytes free)
Switch#

AFTER ABOVE STEP:

Switch>show vlan
VLAN 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
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active

Switch>

thanks that is a mighty kind example

phreak

No problem

I showed two different ways to look at the flash too....

dir flash:

and show flash

There are always many ways of doing the same thing on Cisco gear it seems.

networker050184

In order to delete the VLAN data base you must delete the vlan.dat file.

dtlokee

The answer depends on the mode of the switch, when in VTP transparent the VLANs are stored in the startup config, in server mode they are stored in the VLAN.DAT.

r_durant

dtlokee wrote:

The answer depends on the mode of the switch, when in VTP transparent the VLANs are stored in the startup config, in server mode they are stored in the VLAN.DAT.

Hmmm...I wasn't aware of that, I always thought the VLANs were all stored in the VLAN.dat...good to know!!

dtlokee

VLAN.DAT is only good for VLANs 1-1005, if you want to create the extended range (1006-4094) VLANs then you will need to go to transparent mode which uses the config file, not VLAN.DAT

phreak

Yeah! Thanks for the information. I was not aware of that either.

The only reason I knew the answer that I did is that I was fiddling with vlans at the office here one day, and I tried the erase start reload routine and found they still were there.

Thanks for the info. Maybe that should be added to the master CCNA info document?

liven

thanks again guys, I am really thankful for the info.

arcanium

Thanks for the info, the transparent vtp setting was holding me up as well