Infuture we plan to shift the sepm from one server to other where vlan is change. What is the requirement to fullfil this change without any issue.

Provide some useful info which can help me while change it.

You just need to follow this document

How to move Symantec Endpoint Protection Manager from one server to another server

http://www.symantec.com/business/support/index?page=content&id=TECH199292

Have a look at following KB:

How to move Symantec Endpoint Protection Manager 12.1 from one machine to another

See the article 

http://www.symantec.com/business/support/index?page=content&id=TECH199292

https://www-secure.symantec.com/connect/forums/how-move-sepm-one-server-another-different-ip-address-and-host-name

Hi

Follow the below article and let me know if this helps

http://www.symantec.com/business/support/index?page=content&id=TECH199292

Regards

Hi,

Thank you for posting in Symantec community.

VLAN is changing it means there will be change in IP address and I guess in the hostname as well.

There are multiple scenarios which we should consider while moving SEPM from one server to another server

1) SEPM is having same hostname and IP address

2) SEPM server has a different IP and same hostname

OR

SEPM server has a same IP and different hostanme

3) SEPM server has a differenet IP and different hostaname.

Refer this article to check how it can be done:

How to move SEPM from one server to another server.

https://www-secure.symantec.com/connect/articles/hot-move-sepm-one-server-another-server