How do i swap mgmt vlan remotely if L2 switch support only one L3 Vlan

Answered Question
Aug 26th, 2010
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Hi all,


We are trying to change switch management vlan from vlan 10 to vlan 20 with different gateway...


but we donot have remote hand support and how can we shut the current active L3 valn and un shut the new L3 vlan remotely?


If I am not wrong changing default gateway will not lost the connectivity... right?


Cisco Internetwork Operating System Software
IOS (tm) C2900XL Software (C2900XL-C3H2S-M), Version 12.0(5)WC8, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Thu 19-Jun-03 13:09 by antonino
Image text-base: 0x00003000, data-base: 0x0034E2F4

ROM: Bootstrap program is C2900XL boot loader

TW_DR_AS01 uptime is xxxxxx
System returned to ROM by reload
System image file is "flash:c2900xl-c3h2s-mz.120-5.WC8.bin"


cisco WS-C2924M-XL (PowerPC403GA) processor (revision 0x11) with 8192K/1024K bytes of memory.
Processor board ID FAB0431V0NV, with hardware revision 0x03
Last reset from warm-reset

Processor is running Enterprise Edition Software
Cluster command switch capable
Cluster member switch capable
24 FastEthernet/IEEE 802.3 interface(s)

32K bytes of flash-simulated non-volatile configuration memory.



How do we know.. the switch support only one L3 vlan?


Thanks,

Aung

Correct Answer by mlund about 6 years 8 months ago

Hi Aung


This is one possibilty You can use


1. Make sure You have a tftpserver running

2. Load the config to the server with "copy running tftp"

3. Edit the file on the tftpserver , replace the interface vlan 10 with interface vlan 20, change ip address, change default-gateway.

4. Upload the config to the switch "copy tftp startup"

5. Make sure You have vlan20 in the vlan database.

6. Reload the switch


This is another way to do it


1. Make sure You have a tftpserver running

2. Load the config to the server with "copy running tftp"

3. Edit the file on the tftpserver , so it looks like this,

< config above unchanged >

interface vlan 10

no ip address

shutdown

interface vlan 20

  ip address < new address >

  no shutdown

no ip default-gateway < old entry >

ip default-gateway < new entry >

< config below unchanged>

4. Upload the config to the switch "copy tftp startup"

5. Verify the config in the startup with "show start"

6. Make sure You have vlan20 in the vlan database.

7. Configure the switch with "config mem". This takes 5 to 10 seconds. You will loose you telnet, then do a new telnet to the new address.


The second option is not interupting any user traffic. 


/Mikael

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Correct Answer
mlund Tue, 08/31/2010 - 05:23
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  • Silver, 250 points or more

Hi Aung


This is one possibilty You can use


1. Make sure You have a tftpserver running

2. Load the config to the server with "copy running tftp"

3. Edit the file on the tftpserver , replace the interface vlan 10 with interface vlan 20, change ip address, change default-gateway.

4. Upload the config to the switch "copy tftp startup"

5. Make sure You have vlan20 in the vlan database.

6. Reload the switch


This is another way to do it


1. Make sure You have a tftpserver running

2. Load the config to the server with "copy running tftp"

3. Edit the file on the tftpserver , so it looks like this,

< config above unchanged >

interface vlan 10

no ip address

shutdown

interface vlan 20

  ip address < new address >

  no shutdown

no ip default-gateway < old entry >

ip default-gateway < new entry >

< config below unchanged>

4. Upload the config to the switch "copy tftp startup"

5. Verify the config in the startup with "show start"

6. Make sure You have vlan20 in the vlan database.

7. Configure the switch with "config mem". This takes 5 to 10 seconds. You will loose you telnet, then do a new telnet to the new address.


The second option is not interupting any user traffic. 


/Mikael

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