08-18-2003 10:11 AM - edited 03-02-2019 09:41 AM
I have a Cisco 1900 Switch that has 7 of it's ports connected to seperate small networks. It's trunk port (A) is connected to a Cisco 2611 router. The switch is configured for seperate VLANs and so is the router. When I show the running config on the switch the VLAN configuration is there but if I restart the switch, the VLAN configurations are lost, then I have to manually enter them one at a time. I also noticed that I can only enter the VLAN configurations in either Transparent or Server mode. Below is a sample of the running config of both the router and switch, including the "sh ver" of the switch.
Am I missing something to allow the switch to save the VLAN configurations?
Thanks for any help.
Jeff
Router:
interface FastEthernet0/1
description Port Connected to Port A on Cisco Switch
no ip address
no ip route-cache
no ip mroute-cache
speed 100
full-duplex
no cdp enable
!
interface FastEthernet0/1.1
encapsulation isl 1
ip address x.x.x.x x.x.x.x
no ip redirects
no ip route-cache
no ip mroute-cache
no cdp enable
!
interface FastEthernet0/1.2
encapsulation isl 2
ip address x.x.x.x x.x.x.x
no ip redirects
no ip route-cache
no ip mroute-cache
no cdp enable
!
interface FastEthernet0/1.3
encapsulation isl 3
ip address x.x.x.x x.x.x.x
no ip redirects
no ip route-cache
no ip mroute-cache
no cdp enable
Switch:
vtp client
vtp trap disable
!
vlan 2 name "VLAN0002" sde 100002 state Operational mtu 1500
vlan 3 name "VLAN0003" sde 100003 state Operational mtu 1500
tftp server "X.X.X.X"
tftp filename "cat1900EN.9.00.03.bin"
interface Ethernet 0/1
duplex full
no cdp enable
!
interface Ethernet 0/2
no cdp enable
!
interface Ethernet 0/3
duplex full
vlan-membership static 2
no cdp enable
!
interface Ethernet 0/4
vlan-membership static 3
no cdp enable
!
interface FastEthernet 0/26
duplex full
! spantree start-forwarding
! trunk On
no cdp enable
Switch#sh ver
Cisco Catalyst 1900/2820 Enterprise Edition Software
Version V9.00.03 written from x.x.x.x
Copyright (c) Cisco Systems, Inc. 1993-1999
CGM Switch uptime is 0day(s) 03hour(s) 01minute(s) 05second(s)
cisco Catalyst 1900 (486sxl) processor with 2048K/1024K bytes of memory
Hardware board revision is 5
Upgrade Status: No upgrade currently in progress.
Config File Status: No configuration upload/download is in progress
27 Fixed Ethernet/IEEE 802.3 interface(s)
Base Ethernet Address: 00-02-FD-B6-D5-80
08-18-2003 11:04 AM
Jeff,
Usually, the vlan configuration is stored in the vlan.dat file and saved to the Flash on the switch. Do you see a "vlan.dat" file when you perform a show flash on the switch ?
Regards,
Rajesh
08-18-2003 01:58 PM
Thanks for the reply.
I did a show ? and there is no option to show flash. I even tried entering the command, but it was unrecognized.
Thanks.
Jeff
08-18-2003 02:04 PM
You will need to leave the switch in server or transparent mode. In client mode, no data is stored..it expected to get information from a vtp server (maybe another client). If there is none, there is no vlan information after a reboot.
Server mode will allow the switch to interact with other switches. Transparent mode will not.
08-18-2003 02:17 PM
Thanks for the reply.
How do I leave it in Server mode? If I do, will the VLAN configuration be saved and loaded on reboot?
Thanks for the help.
Jeff
08-19-2003 11:50 AM
Usually I'm adding Vlans via a console port, like that:
DuqSW05-RC30#vlan database
DuqSW05-RC30(vlan)#vlan 10
VLAN 10 added:
Name: VLAN0010
DuqSW05-RC30(vlan)#exit
APPLY completed.
Exiting....
DuqSW05-RC30#
If you whant to see the vlan.dat perform this:
DuqSW05-RC30#sho flash:
Directory of flash:/
2 -rwx 1750311 Feb 28 1993 19:08:13 c2900XL-c3h2s-mz.120-5.3.WC.1.bin
3 -rwx 105970 Jul 17 2000 21:26:29 c2900XL-diag-mz-120.5.2-XU
4 drwx 10176 Feb 28 1993 19:09:25 html
111 -rwx 3416 Jun 27 2003 11:22:27 config.text
112 -rwx 272 Dec 31 1969 19:00:26 env_vars
5 -rwx 111 Feb 28 1993 19:06:45 info
167 -rwx 111 Feb 28 1993 19:09:25 info.ver
168 -rwx 660 Oct 21 1993 04:11:36 vlan.dat
3612672 bytes total (464896 bytes free)
DuqSW05-RC30#
Hope this help
Yves
08-19-2003 01:48 PM
Thanks for the reply, but my switch does not support the show flash command.
Jeff
08-19-2003 02:00 PM
Since this is a 1900 I dont think the last post or several of the others apply. There is no vlan database per se. In command line enter
Cisco1924#sh vtp
VTP version: 1
Configuration revision: 21
Maximum VLANs supported locally: 1005
Number of existing VLANs: 16
VTP domain name :
VTP password :
VTP operating mode : Server
VTP pruning mode : Disabled
VTP traps generation : Enabled
Configuration last modified by: 133.7.10.254 at 00-00-0000 00:00:00
Look for operating mode, if its client that might be the problem. Enter config mode and enter
Cisco1924(config)#vtp ?
client VTP client
domain Set VTP domain name
password Set VTP password
pruning VTP pruning
server VTP server
transparent VTP transparent
trap VTP trap
Set it to server or transparent. Exit
Then try a show vlan. Create some vlans if necesary and reboot to see if they stay.
08-19-2003 03:02 PM
Thank you for the reply. I will try this and post the results.
Jeff
08-29-2003 04:11 AM
I made sure the VTP mode was server and the VLANs existed before I rebooted the switch. When the switch came up it did not have the VLAN configurations. When I create a VLAN after every VLAN I create it defaults to client and I have to set it to Server to create the next VLAN. When I do the VLAN configuration I do them in the Menu system not the command line. Would this make a difference of it's ability to save the VTP mode and VLANs?
Thanks for any help.
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