Management VLAN Migration from /27 to /25

[Christian.R]

Hi Guys

Im planning a migration of a management Vlan.

Could you please review the following idea:

Is it possible to configure a secondary IP address on the mgmt Vlan interface (Access-Switch).

->with no connection loss<-

Then configure the new default gateway on the access-Switch.

->now connections loss<-

Then change the Subinterface IP address on the router to the new IP range.

->connection restored<-

(Via secondary IP on the Access-Switch / new Subnet)

Then clean up the Access-Switch mgmt vlan interface.

->delete old ip statement, move the same ip address from secondary to "primary", then delete the secondary statement

Thanks in advance for your help

Greetz Chris

[Mark Malone · Accepted solution]

Hi
sounds ok
creating a secondary does not cause any issue , will not bounce an interface

"move the same ip address from secondary to "primary", then delete the secondary statement"
You just remove the secondary part of the command to make it primary , it wont allow 2 of the same subnet under the interface even of secondary is configured

[Christian.R]

Hi Mark

Thanks for your input.

Regards

Chris

[Christian.R]

i did verify it in a test environment

example:

Interface Vlan 10

description mgmt vlan

ip address 192.0.0.1 255.255.255.0

ip address 192.0.0.2 255.255.255.0 secondary

->

as soon as you type (in interface vlan 10)

ip address 192.0.0.2 255.255.255.0

it will become the "primary" IP and the secondary statement will be deleted (since its the same IP address)

Thanks

Regards Chris

[Mark Malone]

ah grand :)