IPoE clients suddenly not pingable from VyOS

General questions
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1

Hi everyone,

I have test setup that works perfectly then suddenly our IPoE clients IP address were unable to ping from VyOS. I’m able to ping the gateway (10.10.1.1) from VyOS but I can’t ping the ONU IP address 10.10.1.2. From ONU I can’t ping the 10.10.1.1 and IP address of the VyOS. Im using VyOS 1.5-rolling-202309250022 version. Thanks!

set interfaces ethernet eth0 address ‘dhcp’
set interfaces loopback lo
set nat source rule 100 outbound-interface ‘eth0’
set nat source rule 100 source address ‘10.10.1.0/24’
set nat source rule 100 translation address ‘masquerade’
set service dns forwarding allow-from ‘10.10.1.0/24’
set service dns forwarding cache-size ‘0’
set service ipoe-server authentication interface eth0
set service ipoe-server authentication mode ‘radius’
set service ipoe-server authentication radius accounting-interim-interval ‘60’
set service ipoe-server authentication radius dynamic-author key ‘secret’
set service ipoe-server authentication radius dynamic-author port ‘3799’
set service ipoe-server authentication radius dynamic-author server ‘0.0.0.0’
set service ipoe-server authentication radius nas-identifier ‘vyos’
set service ipoe-server authentication radius nas-ip-address ‘192.168.1.17’
set service ipoe-server authentication radius rate-limit enable
set service ipoe-server authentication radius server 192.168.1.33 acct-port ‘1813’
set service ipoe-server authentication radius server 192.168.1.33 key ‘secret’
set service ipoe-server authentication radius server 192.168.1.33 port ‘1812’
set service ipoe-server interface eth0 client-subnet ‘10.10.1.0/24’
set service ipoe-server interface eth0 mode ‘l2’
set service ipoe-server interface eth0 network ‘shared’
set service ipoe-server name-server ‘8.8.8.8’

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2

You say “then suddenly”.

So it works if you reboot the VyOS but then after x minutes it stops working?

From your screenshot it seems like the hosts asking about 10.10.1.1 refuse to learn the mac-address through ARP because we can for example see 10.10.1.4 asking “who-has 10.10.1.1” and get a reply but then 1 second later ask again?

How does it look if you run the same tcpdump on the 10.10.1.4 host?

3

My setup works perfectly in weeks but one day IPoE clients were unable to ping.

Same result even I rebooted the VyOS VM.

…get a reply but then 1 second later ask again?
That’s correct I can see ARP Request again.

4

Yes but if you can see the arp requests, where did you do the tcpdump?

Because when 10.10.1.4 receives the arp reply it shouldnt ask the same question again 1 second later.

Also if your setup worked fine for weeks and suddently stopped working you should take a look at what you did to your network and boxes involved that time of day when it suddently stopped working.

Also “did you try to turn it off and on again?”…

5

Sorry, not VyOS fault. It’s on OLT side. There’s specific config in OLT that has been reverted to default after reboot. Thanks

6

Thanks for the followup :slight_smile:

7

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