Hi Xuekun,
The transaction ID used by VPP is from a series of random numbers, however,
each VPP seeds the RNG the same, so the sequence will be the same. Please
update:
static clib_error_t *
dhcp_client_init (vlib_main_t * vm)
{
dhcp_client_main_t *dcm = &dhcp_client_main;
dcm->vlib_main = vm;
dcm->vnet_main = vnet_get_main ();
dcm->seed = 0xdeaddabe; <<<<<
return 0;
}
the client-ID is user provided on the API.
Regards
Neale
De : <[email protected]> au nom de Xuekun <[email protected]>
Date : mardi 11 décembre 2018 à 03:51
À : "Dave Barach (dbarach)" <[email protected]>, vpp-dev <[email protected]>
Objet : Re: [vpp-dev] get the same IP address from DHCP server for two VPP DHCP
clients
No, they have different MACs.
Here is the JIRA (https://jira.fd.io/browse/VPP-1528) with pcap captured. My
quick glance found the two SUTs sent the same “transaction id” in the DHCP
discover that why they got the same IP address.
1,SUT1_TX:
[cid:[email protected]]
2, SUT2_TX:
[cid:[email protected]]
Is there anyone can take a look? 😊
Thanks.
From: Dave Barach (dbarach) <[email protected]>
Sent: Monday, December 10, 2018 10:36 PM
To: Hu, Xuekun <[email protected]>; vpp-dev <[email protected]>
Subject: RE: [vpp-dev] get the same IP address from DHCP server for two VPP
DHCP clients
Just to ask: is there any chance that the 2x UUT’s are using the same MAC
address by mistake?
D.
From: [email protected]<mailto:[email protected]>
<[email protected]<mailto:[email protected]>> On Behalf Of Xuekun
Sent: Monday, December 10, 2018 9:05 AM
To: Dave Barach (dbarach) <[email protected]<mailto:[email protected]>>;
vpp-dev <[email protected]<mailto:[email protected]>>
Subject: Re: [vpp-dev] get the same IP address from DHCP server for two VPP
DHCP clients
I also think it is a very basic functionality, so I tried with two different
DHCP servers, but … ☹
I will attach the pcap file into the JIRA. Thanks.
From: Dave Barach (dbarach) <[email protected]<mailto:[email protected]>>
Sent: Monday, December 10, 2018 8:47 PM
To: Hu, Xuekun <[email protected]<mailto:[email protected]>>; vpp-dev
<[email protected]<mailto:[email protected]>>
Subject: RE: get the same IP address from DHCP server for two VPP DHCP clients
This sounds more like dhcp server misconfiguration than a dhcp client bug in
vpp, but anyway...
You can submit a Jira ticket, but it will end up in “information request” state
immediately if it doesn’t include a pcap capture which shows both transactions.
The vpp dhcp client code is not new, and it’s been tested pretty carefully.
HTH... Dave
From: [email protected]<mailto:[email protected]>
<[email protected]<mailto:[email protected]>> On Behalf Of Xuekun
Sent: Monday, December 10, 2018 1:45 AM
To: vpp-dev <[email protected]<mailto:[email protected]>>
Subject: [vpp-dev] get the same IP address from DHCP server for two VPP DHCP
clients
Hi, All
Have anyone met the same issue? Should I submit a JIRA?
I tried 18.10 and master, both the SUTs got the same IP address from my
corporate DHCP server and my setup dnsmasq DHCP server.
vpp configure:
set int state TenGigabitEthernet6/0/1 up
set dhcp client intfc TenGigabitEthernet6/0/1
show int address
Thx, Xuekun
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