ISP PPPoE dialer connection is flapping with virtual interface
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12-28-2016 09:27 AM - edited 03-05-2019 07:45 AM
Dear all,
I am facing issue with PPPoE connection this connection was working from the past 2 month suddenly one day stopped working.
always getting log like bound or unbound dialer 1 interface with virtual interface 1 line protocol up/down
dialer interface no longer able to get any ip address through ipcp, expecting your help.
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12-28-2016 01:25 PM
Hello,
under the dialer interface, make sure you have configured:
dialer idle-timeout 0
dialer persistent
Which router and IOS are you using ? Can you post the config ?
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12-28-2016 09:30 PM
Using 1900
below are the exact configuration
interface Dialer1
ip address negotiated
ip accounting output-packets
ip nbar protocol-discovery
ip nat outside
ip virtual-reassembly in
encapsulation ppp
ip tcp adjust-mss 1414
dialer pool 1
dialer idle-timeout 0
ppp pap sent-username ***** password *******
no cdp enable
end
interface GigabitEthernet0/0
description Outside interface
no ip address
duplex auto
speed auto
pppoe enable group global
pppoe-client dial-pool-number 1
end
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12-29-2016 12:10 AM
Hello,
try and make the additions below to the configuration of your dialer interface:
interface Dialer1
ip address negotiated
ip accounting output-packets
ip nbar protocol-discovery
ip mtu 1400
ip nat outside
ip virtual-reassembly in
encapsulation ppp
ip tcp adjust-mss 1360
dialer pool 1
dialer idle-timeout 0
dialer persistent
ppp pap sent-username ***** password *******
no cdp enable
That said, the problem might be at a lower level, the physical one possibly. Can you change the cabling ?
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12-30-2016 09:44 AM
Hello
Can you check for the correct authentication?
debug ppp negotiation
debug ppp authentication
Also debug the ppoe sessions
debug ppoe events
show ppoe session
Chap
int dialer1
mtu 1492
ip tcp adjust-mms 1452
ppp chap hostname xxxx
ppp chap password xxxxxx
IP route 0.0.0.0 0.0.0.0 dialer1
res
paul
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Kind Regards
Paul
