Github user remibergsma commented on the pull request:
https://github.com/apache/cloudstack/pull/1231#issuecomment-164163586
Thanks for the quick fix @wilderrodrigues.
Bit explanation: redundant routers worked fine in our 4.7 cloud, then all
of a sudden were broken. Root cause was due to `virtual_router_id` was set to
vpc_id. When we got more than 255 it broke, as this `keepalived` setting can
only be 0-255. This keeps the default in the template, which is in
`keepalived.conf.templ`:
```
virtual_router_id 51
```
Thanks @fborn for discovering the issue!
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