I am trying to upgrade the IOS of L2 switch 2950 from my tftp server.
But it is getting error.
When I ping my tftp server from router 2611 and reverse, the ping is good.
What can be the problem?
Assuming that 10.200.200.10 is a legitimate IP address and is unique in the network then I do not see a problem with assigning that address to VLAN49. You can put an IP address on only 1 VLAN and it can be any VLAN on the switch that you choose. If you put that address on VLAN49 and if the TFTP server is in the same subnet, then you should be able to download the new code. If the TFTP server is in a different subnet (or if you will want access to the switch from any address in any different subnet or if you want the switch to access any destination address in a different subnet) then you will also need to configure a default gateway on the switch pointing to a layer 3 routing interface in the subnet of 10.200.200.10.
I do not believe that the switch having an IP address will impact any of the production traffic in your network.