Hoi Baurine,
Do you happen to have the ability to tcpdump on the DHCP server? I am
confident that linux-cp (and the lcpng) will forward this traffic out
because it's a broadcast packet (and all traffic will be handled), but I am
not confident that the packet is (a) arriving at the DHCP server and (b)
being returned or (c) being forwarded through the TAP to your dhclient.
Can you possibly tcpdump on the *DHCP* *server ?*
groet,
Pim
On Wed, Mar 1, 2023 at 8:36 PM Bauruine <li...@tuxli.ch> wrote:
> Hi Xiaodong
>
> Yes and if i add an ip to the tap in Linux it also shows up in VPP. I'm
> adding the full config at the end of the mail.
>
> No I can't get an answer that's what I'm trying to achieve.
>
> [stefan@gw02:~]$ sudo dhclient -v ge0-3
> Listening on LPF/ge0-3/00:0d:b9:50:99:0a
> Sending on LPF/ge0-3/00:0d:b9:50:99:0a
> Sending on Socket/fallback
> DHCPDISCOVER on ge0-3 to 255.255.255.255 port 67 interval 3
> (xid=0x5538f068)
> DHCPDISCOVER on ge0-3 to 255.255.255.255 port 67 interval 3
> (xid=0x5538f068)
> DHCPDISCOVER on ge0-3 to 255.255.255.255 port 67 interval 7
> (xid=0x5538f068)
>
> [stefan@gw02:~]$ grep -v "\#" /etc/vpp/startup.conf | grep -v -e '^$'
> unix {
> nodaemon
> log /var/log/vpp/vpp.log
> full-coredump
> cli-listen /run/vpp/cli.sock
> gid vpp
> exec /etc/vpp/bootstrap.vpp
> }
> api-trace {
> on
> }
> api-segment {
> gid vpp
> }
> socksvr {
> default
> }
> cpu {
> main-core 1
> workers 2
> skip-cores 0
> }
> plugins {
> plugin lcpng_nl_plugin.so { enable }
> plugin lcpng_if_plugin.so { enable }
> }
> logging {
> default-syslog-log-level info
> class linux-cp/if { rate-limit 10000 level debug syslog-level debug }
> class linux-cp/nl { rate-limit 10000 level debug syslog-level debug }
> }
> lcpng {
> lcp-sync
> lcp-auto-subint
> }
> [stefan@gw02:~]$ grep -v -e '^$' /etc/vpp/bootstrap.vpp
> set interface state GigabitEthernet3/0/0 up
> lcp create GigabitEthernet3/0/0 host-if ge0-3
>
>
> On 01.03.23 20:08, Xiaodong Xu wrote:
>
> Hi Stefan,
>
> Did you also enable 'linux-nl' plugin, in addition to 'linux-cp'? I
> suppose 'linux-nl' is the one which syncs IP addresses/routes from Linux to
> VPP.
>
> BTW, were you able to get the IP address / route after you ran the dhcp
> client on the tap interface? If not what do the error / log messages look
> like?
>
> Xiaodong
>
> On Wed, Mar 1, 2023 at 10:42 AM Bauruine <li...@tuxli.ch> wrote:
>
>> Hi
>>
>> I would like to use VPP with the lcpng plugin as a home gateway where I
>> have to use dhcp to get an IP from my ISP. If I use the dhcp plugin of
>> VPP it works and I can see an IP address on the interface on Linux but
>> no route which was to be expected as lcpng doesn't sync routes from VPP
>> to Linux.
>>
>> Is it possible to use a dhcp client on Linux to get the IP and routes on
>> Linux where they are synced back to VPP? I naively tried "lcp create
>> GigabitEthernet3/0/0 host-if ge0-3" in VPP and then "dhclient -v ge0-3"
>> on Linux without success. Is there anything I have to configure or is
>> this not possible? I'm using VPP 23.02 with lcpng master.
>>
>> Any help is highly appreciated.
>>
>> Best regards,
>>
>> Stefan
>>
>>
>>
>>
>>
>
>
>
>
--
Pim van Pelt <p...@ipng.nl>
PBVP1-RIPE - http://www.ipng.nl/
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