On 2019-08-09 09:42:10 +0200, Beniamino Galvani wrote:
On Thu, Aug 08, 2019 at 06:07:41PM +0200, Vincent Lefevre wrote:On 2019-08-08 13:37:04 +0200, Michael Biebl wrote:Bringing Vincent into the loop here. Vincent, can you gather the information Beniamino is asking for? Am 08.08.19 um 09:51 schrieb Beniamino Galvani:Would it be possible to capture a dump of DHCP packets for a success and for a failure?Each time after DHCP Request, there are 1 NAK packet (from 10.0.1.1) and 2 NAK packets (from 140.77.1.11 and 140.77.1.12), but not always
^^^ ACK Grrr... I meant "ACK". Sorry. Being a bit tired...
in the same order. With the internal DHCP client, this seems to be a success only if an ACK packet comes first. There is no such issue with the external one.
By an ACK packet, I meant, one of the 2 packets from 140.77.1.*.
Do you need more information?Could you capture DHCP packets with: tcpdump -i enp0s25 -s 0 -w dhcp.pcap udp port 67 or port 68 when using dhclient and the failing internal client, and attach the files?
dhcp-dhclient.pcap - using dhclient (success, though NAK came first)
dhcp-int-failure.pcap - using the internal client (failures until
I stopped the capture; ACK never came first)
dhcp-int-success.pcap - using the internal client (success after
several requests, once ACK came first)
--
Vincent Lefèvre <vincent vinc17 net> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
Attachment:
dhcp-dhclient.pcap
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Attachment:
dhcp-int-failure.pcap
Description: Binary data
Attachment:
dhcp-int-success.pcap
Description: Binary data