Test system image: 1.5-rolling-202501250006
brief:
1. no pppoe: static route works
2. add pppoe interface
3. change static route: not working
I use 192.168.51.0/24 for test.
```
vyos@vyos# show protocols static route 192.168.51.0/24
interface eth0 {
}
interface lo {
distance 10
}
[edit]
vyos@vyos# delete protocols static route 192.168.51.0/24 interface lo
[edit]
vyos@vyos# commit
[edit]
vyos@vyos# ip route show
default nhid 10 via 192.168.12.1 dev eth0 proto static metric 20
192.168.12.0/24 dev eth0 proto kernel scope link src 192.168.12.70
192.168.10.0/24 nhid 10 via 192.168.12.1 dev eth0 proto static metric 20
192.168.51.0/24 nhid 7 dev eth0 proto static metric 20
[edit]
# 192.168.51.0/24 dev eth0 appears above
vyos@vyos# delete protocols static route 192.168.51.0/24 interface eth0
[edit]
vyos@vyos# set protocols static route 192.168.51.0/24 interface lo
[edit]
vyos@vyos# commit
[edit]
vyos@vyos# ip route show
default nhid 10 via 192.168.12.1 dev eth0 proto static metric 20
192.168.12.0/24 dev eth0 proto kernel scope link src 192.168.12.70
192.168.10.0/24 nhid 10 via 192.168.12.1 dev eth0 proto static metric 20
192.168.51.0/24 nhid 13 dev lo proto static metric 20
[edit]
# 192.168.51.0/24 changed to dev lo
vyos@vyos# show interfaces pppoe
Configuration under specified path is empty
[edit]
vyos@vyos# set interfaces pppoe pppoe0 authentication username test
[edit]
vyos@vyos# set interfaces pppoe pppoe0 authentication password test
[edit]
vyos@vyos# set interfaces pppoe pppoe0 source-interface eth1
[edit]
vyos@vyos# commit
[edit]
# pppoe added above, I tested on my vyos env (with a working pppoe config) and then using live image for minimum test env ( with random config).
vyos@vyos# ip route show
default nhid 10 via 192.168.12.1 dev eth0 proto static metric 20
192.168.12.0/24 dev eth0 proto kernel scope link src 192.168.12.70
192.168.10.0/24 nhid 10 via 192.168.12.1 dev eth0 proto static metric 20
192.168.51.0/24 nhid 13 dev lo proto static metric 20
[edit]
# now try to change route
vyos@vyos# delete protocols static route 192.168.51.0/24 interface lo
[edit]
vyos@vyos# set protocols static route 192.168.51.0/24 interface eth0
[edit]
vyos@vyos# commit
[edit]
vyos@vyos# ip route show
default nhid 10 via 192.168.12.1 dev eth0 proto static metric 20
192.168.12.0/24 dev eth0 proto kernel scope link src 192.168.12.70
192.168.10.0/24 nhid 10 via 192.168.12.1 dev eth0 proto static metric 20
192.168.51.0/24 nhid 13 dev lo proto static metric 20
[edit]
vyos@vyos#
# not changed
```