Hey all 
I want to preface this with the information that I am a complete vyos beginner (although not new to networking, sysadmin …) so I might as well be missing something very obvious in the configuration.
I have a pretty straight forward setup, vyos as my router/dhcp server/dns resolver for a set of servers in my homelab (all virtualized).
On the WAN side it’s pretty straight forward, my upstream router hands vyos a static IP based on its MAC address and internet access.
On the LAN side I want vyos to:
- hand out predefined IPs to clients based on their MAC address
- inform each DHCP client what its hostname is (this is where I’m seeing not so reliable results)
- Resolve A and PTR queries for the clients’ FQDN
My problem is that while sometimes my clients are getting their hostname from the vyos dhcp server it’s not always (even for the same client across reboots) and the hostname that I’ve observed my clients getting is either their desired hostname, their FQDN or localhost.
Things that work well:
- reliably assign IP to clients based on their MAC address
- Name resolution (i.e.
dig master0 @10.0.0.1anddig -x 10.0.0.3 @10.0.0.1reply with the expected A and PTR records, same works from clients of vyos)
Things that don’t really work:
- Reliably set hostname (oscillates between hostname, fqdn and
localhost) -
show dhcp server statisticsandshow dhcp server leases state allalways come back empty, regardless of how many clients are connected and got their IP through DHCP (but always statically leased). Minor observation, doesn’t really affect operations.
My config (redacting / minifying for space and privacy) is :
interfaces {
ethernet eth0 {
address dhcp
description WAN
offload { ... }
}
ethernet eth1 {
address 10.0.0.1/24
description LAN
offload { ... }
}
loopback lo {}
}
nat {
source {
rule 100 {
outbound-interface eth0
source {
address 10.0.0.0/24
}
translation {
address masquerade
}
}
}
}
service {
dhcp-server {
shared-network-name LAN {
subnet 10.0.0.0/24 {
default-router 10.0.0.1
lease 86400
name-server 10.0.0.1
static-mapping bootstrap {
ip-address 10.0.0.8
mac-address <REDACTED>
}
static-mapping lb {
ip-address 10.0.0.2
mac-address <REDACTED>
}
static-mapping master0 {
ip-address 10.0.0.3
mac-address <REDACTED>
}
static-mapping master1 {
ip-address 10.0.0.4
mac-address <REDACTED>
}
static-mapping master2 {
ip-address 10.0.0.5
mac-address <REDACTED>
}
static-mapping worker0 {
ip-address 10.0.0.6
mac-address <REDACTED>
}
static-mapping worker1 {
ip-address 10.0.0.7
mac-address <REDACTED>
}
}
}
}
dns {
forwarding {
allow-from 10.0.0.0/24
cache-size 0
listen-address 10.0.0.1
}
}
ssh { ... }
}
system {
...
host-name router
ipv6 {
disable-forwarding
}
login { ... }
name-server 192.168.50.1
name-server eth0
ntp { ... }
static-host-mapping {
host-name bootstrap {
alias bootstrap.sub.domain.com
inet 10.0.0.8
}
host-name lb {
alias api-int.sub.domain.com
inet 10.0.0.2
}
host-name master0 {
alias master0.sub.domain.com
inet 10.0.0.3
}
host-name master1 {
alias master1.sub.domain.com
inet 10.0.0.4
}
host-name master2 {
alias master2.sub.domain.com
inet 10.0.0.5
}
host-name worker0 {
alias worker0.sub.domain.com
inet 10.0.0.6
}
host-name worker1 {
alias worker1.sub.domain.com
inet 10.0.0.7
}
}
...
}