This question already has an answer here:
Two of my nodes running geth version 1.5.3 have been working great on testnet since 24th November 2016 by using this command:
geth --rpc --datadir /mydatadir/.ethereum/testnet --networkid 3
but recently they seem to be working on another chain or fork different from testnet.etherscan.io. Transactions and balances are different on my nodes from the public testnet explorer. Last transactions created by the nodes don't even exist on testnet.etherscan.io so I guess my nodes are working off the main testnet chain.
For example, the address 0xf28dafbfeb41bf32869c9d498da0d651d0206ed4 has 9,041 ethers according to testnet.etherscan.io but it has 10,121 according to my nodes:
Besides, my nodes are reporting last block is #667887 meanwhile testnet.etherscan.io says it is #690562
Has been there any kind of fork on testnet lately? Is parameter networkid = 3 right to work on Ropsten testnet? Do I have to upgrade my node to work on the standard testnet chain again? Thx!
P.S.: After reading the 5 answers at Ropsten testnet is under kind of attack? What can we do? my conclusion is Geth as of now cannot operate on last testnet Kovan. Right? So, only option seems to be to wait for new geth release or migrate my nodes to Parity, is that correct?