Bug 15757 - udhcpc: unicast renew fails sporadically
Summary: udhcpc: unicast renew fails sporadically
Status: NEW
Alias: None
Product: Busybox
Classification: Unclassified
Component: Networking (show other bugs)
Version: 1.34.x
Hardware: All Linux
: P5 normal
Target Milestone: ---
Assignee: unassigned
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-09-06 09:04 UTC by json.wago
Modified: 2023-09-06 09:07 UTC (History)
2 users (show)

See Also:
Host:
Target:
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Attachments
config (33.11 KB, application/octet-stream)
2023-09-06 09:04 UTC, json.wago 		Details
pcap of the failed dhcp renew (5.78 KB, application/octet-stream)
2023-09-06 09:06 UTC, json.wago 		Details
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Description json.wago 2023-09-06 09:04:31 UTC 
Created attachment 9631 [details]
config

When using busybox udhcpc in combination with OpenDHCP server, its sometimes observed that udhcpc fails to handle/recognize the ACK for the unicast REQUEST (renew).
The following broadcast renew is handled successfully. This behavior is not observed when using a different dhcp-server like dnsmasq or isc-dhcp-server.

The unhandled dhcp ACK is seen on the interface that udhpc is listening on (via tcpdump).
Comment 1 json.wago 2023-09-06 09:06:55 UTC 
Created attachment 9634 [details]
pcap of the failed dhcp renew