[SOLVED] Can't get ipv6 address by dhcp for vmbr0

C

chineseswish

New Member
Nov 12, 2024
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After upgrade to new version,I can't obtain ipv6 dhcp address again.How do it in the 9.0.11?

I try setup /etc/network/interfaces :
iface vmbr0 inet6 dhcp
Click to expand...
Problem still exists.
I try use dhclient -6 vmbr0 and success.
I setup ipv6 address static

Code: 
iface vmbr0 inet manual
        address 192.168.3.86/24
        gateway 192.168.3.1
        bridge-ports enp6s0
        bridge-stp off
        bridge-fd 0
        mtu 9000
 
Install "apt install isc-dhcp-client" should fix it.

Y

Thread 'Proxmox 9.0.4 doesn't get IP by DHCP'

After changing /etc/network/interfaces on a fresh install to:

iface vmbr0 inet dhcp

and running ifreload -a I'm receiving an error message:

vmbr0: cmd '/sbin/dhclient -pf /run/dhclient.vmbr0.pid -lf /var/lib/dhcpdhclient.vmbr0.leases vmbr0' failed([Errno 2] No such file or directory: '/sbin/dhclient')

Indeed there is no file 'dhclient' in /sbin forlder.

Strangely enough it looks like the installer runs DHCP client to pick the IP bound to MAC address up but makes it static.

It worked for sure on version 8.3 or 8.4. But not with v9. Can anyone help please?
 
encryptedserver said:
Install "apt install isc-dhcp-client" should fix it.

Y

Thread 'Proxmox 9.0.4 doesn't get IP by DHCP'

After changing /etc/network/interfaces on a fresh install to:

iface vmbr0 inet dhcp

and running ifreload -a I'm receiving an error message:

vmbr0: cmd '/sbin/dhclient -pf /run/dhclient.vmbr0.pid -lf /var/lib/dhcpdhclient.vmbr0.leases vmbr0' failed([Errno 2] No such file or directory: '/sbin/dhclient')

Indeed there is no file 'dhclient' in /sbin forlder.

Strangely enough it looks like the installer runs DHCP client to pick the IP bound to MAC address up but makes it static.

It worked for sure on version 8.3 or 8.4. But not with v9. Can anyone help please?
Click to expand...
Thanks for you help.I already install it but no ipv6 address assigned.

I current add a script use cron at boot to fix this issue.But I want a simple solution.
Code: 
#!/bin/bash
until ip link show vmbr0 | grep "state UP" > /dev/null; do
        sleep 1
done
sudo dhclient -6 vmbr0

But this get IPv6 address is masked by /128:
Code: 
4: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9000 qdisc noqueue state UP group default qlen 1000
    link/ether 38:bc:01:93:7a:c2 brd ff:ff:ff:ff:ff:ff
    inet 192.168.3.254/24 scope global vmbr0
       valid_lft forever preferred_lft forever
    inet6 2408:8234:12:cb0::5/128 scope global dynamic
       valid_lft 259199sec preferred_lft 172799sec
    inet6 fe80::3abc:1ff:fe93:7ac2/64 scope link proto kernel_ll
       valid_lft forever preferred_lft forever

Normal get IPv6 address is /64.
 
Last edited:
Solution:
1. Install dhcpcd5
2. Edit /etc/dhcpcd.conf ,append my config.
Code: 
allowinterfaces vmbr0

interface vmbr0
static ip_address=192.168.3.254/24
static routers=192.168.3.1
static domain_name_servers=192.168.3.1 1.2.4.8 223.5.5.5
ipv6rs
dhcp6
3. Reboot system and use ip a ,vmbr has correct IPv6 address.
 
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