Github user ustcweizhou commented on the issue:
https://github.com/apache/cloudstack/pull/2003
@swill
first_i_p in json -> firstIP in java. This is formatted by google.gson
it is defined in api/src/com/cloud/agent/api/to/IpAddressTO.java, and used
in server/src/com/cloud/network/router/CommandSetupHelper.java
so, the issue might be caused by commit
baac747089ef48ea6627a6aacf27156222862352
not sure.
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