PPPoE User Suddenly internet is not working even user is connected

[Igor Smitran]

Staled sessions should be cleared by pppoe concentrator based on LCP probes.

LCP probe every 30 seconds.

If 3 LCP probes fail than clear virtual interface.

I think every modern pppoe concentrator has this capability included 
(including Mikrotik).

There is no need for additional scripting, making system more 
complicated than it is currently.


Igor


On 31.5.23. 14:15, Suman Dash wrote:
> This is common in ISP networks as I have seen similar issues myself. It has
> nothing to do with freeradius. The issue is PPPoE is a jitter sensitive
> protocol and the connection becomes zombie if there is a small jitter in
> the network. Once the session becomes zombie , it looks like the user is
> connected but there is no traffic between the user & NAS.
>
> To tackle this, 1. Avoid Jitters 2. Disconnect User in 24 hrs timeframe. 3.
> If PPPoE clients are icmp reachable use a watchdog script to remove session
> if unreachable.
>
> Regards
>
> On Wed, May 31, 2023 at 1:28 PM Igor Smitran <sigor at blic.net> wrote:
>
>> Most likely you are having routing problems.
>>
>> User gets IP from dynamic pool. When user gets IP address from address
>> block that is wrongly routed he will not get internet access.
>>
>> After reconnecting he is mostly likely getting address from correctly
>> routed address block and everything is fine.
>>
>> Maybe it's a good start to check your ip pools on pppoe concentrator and
>> routing for those address blocks.
>>
>>
>> Igor
>>
>> On 31.5.23. 09:49, Vijay A wrote:
>>> Once a user is connected, Mikrotik doesn't keep any concern with Radius
>> for
>>> browsing related things. it's all about network .
>>>
>>> Regards
>>> Vijay A.
>>>
>>> On Sat, May 27, 2023 at 1:56 PM Imdad Hasan <imdadalikadiwala0 at gmail.com
>>>
>>> wrote:
>>>
>>>> Hi All,
>>>>
>>>> One of my clients is complaining to me sometimes, a pppoe user suddenly
>>>> showing no internet at the user side but the user is connected with
>>>> mikrotik pppoe server.. when he disconnects it from mikrotik and after
>>>> re-connection, that user's internet is working fine at the user side..
>>>>
>>>> So, is this related to the radius accounting response or something?
>>>>
>>>> Because this issue is not there when he is connected to a local user
>> which
>>>> is created in mikrotik without radius.
>>>>
>>>>
>>>> Thanks
>>>> Imdad
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