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authorBeniamino Galvani <bgalvani@redhat.com>2016-01-27 11:21:23 +0100
committerBeniamino Galvani <bgalvani@redhat.com>2016-02-02 15:23:34 +0100
commit1d1a3e0afb85478cda43670b8ed92a6db6c83f3e (patch)
tree97b240693fba36064c44c19b458031a3089f7beb /sysusers.d
parentcd72d2044ad28b475bf84a38ba6db45292467dd8 (diff)
dhcp: delay restarts after NAKs
The server might answer to a DHCPREQUEST with a NAK and currently the client restarts the configuration process immediately. It was observed that this can easily generate loops in which the network is flooded with DISCOVER,OFFER,REQUEST,NAK sequences. RFC 2131 only states that "if the client receives a DHCPNAK message, the client restarts the configuration process" without further details. Add a delay with exponential backoff between retries after NAKs to limit the number of requests and cap the delay to 30 minutes.
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