| Mikrotik PPPoE server - Failing Hi Guys,
Here is the scenario.
I have an rb750 connected to a cisco router(client) for some months now with no issues over ethernet. The customers pppoe username and password are on the 750, and not stored on a radius server.
Today the client calls up to say they have not internet,
When I look in the logs all i can see is;
PPPOE connection established from (MAC ADDRESS)
PPPOE-0 waiting for call
PPPOE-0 authenticated
PPPOE-0 terminating
PPPOE-0 disconnecting...
I have removed the customers secret, and redone it again. I have also removed the pppoe server and also redone this again too.
When I changed the customers password on the rb750, it does tell me the authenticating is failing.
Their router just seems not to be picking up the public ip address from us as it terminates just after authenticating.
The only issue that occured that I can see is that the rb750 lost power at the time this happened.
Any ideas guys how to troubleshoot? There will be no techie there until tomorrow to test it with a laptop. |
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 TomS_Git-r-donePremium,MVM
join:2002-07-19
London, UK
kudos:4 | You could always try a reboot of the Cisco, not that you should need to.
Failing that, I am pretty well versed in debugging on Ciscos, so if you need a hand I might be able to help out.
Useful debugging commands for Cisco in this scenario:
debug pppoe events
debug ppp authentication
Should give you a pretty good idea what is going on.
Basic PPPoE flow should be:
Client tx PADI
Client rx PADO
Client tx PADR
Client rx PADS
If you get to PADS then PPPoE is fine, and its probably failing in PPP itself, where the second command above should provide some detail. |
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| Thanks Tom, unfortunatly I do not have access to the cisco router as the customer has a 3rd party handling that side of it.
They wont be back until the morning. |
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 InssomniakThe GlitchPremium
join:2005-04-06
Cayuga, ON
kudos:1 | reply to Bigpaddy_Irl
I get that if a wireless link is failing.
Turn on PPPoE debug, mikrotik has some amazing PPPoE debugging built in.
--
OptionsDSL Wireless Internet
»www.optionsdsl.ca |
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lutful... of ideasPremium
join:2005-06-16
Ottawa, ON | reply to Bigpaddy_Irl
PPPoE failure immediately after authentication could be during the Path MTU discovery process. During debugging check if Mikrotik sends Don't Fragment packet or if Cisco sends ICMP Fragmentation Required packet. |
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| reply to Bigpaddy_Irl
Found the problem, a corrupt firmware image on the cisco.
As soon as it was updated, it flew it! |
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