[CentOS] pppoe problems

[Aleksandar Milivojevic]

Quoting kai <centos at sandsengen.com>:

> I'm having problem connecting to my isp with my sangoma s518.
> Everything seems to run smooth and wanrouter are training to
> connect....but forever..

Check that username and password in /etc/ppp/pap-secrets and  
chap-secrets are correct.  It might seem trivial, but I got burned  
with it once.  Also check that you pointed it to correct Ethernet  
interface.  If the modem is directly connected to the Ethernet  
interface (in other words, it is used only as connection to the modem)  
you want to have that Ethernet interface in UP state, but with no IP  
address on it (well, at least in default config).  You could do  
something like "ifconfig eth0" or "ip addr show dev eth0" to check if  
the interfaces is up or down (you should see word UP in the flags).

For example, your /etc/sysconfig/network-scripts/ifcfg-eth0 (assuming  
we are talking about eth0 interface here) should look something like:

DEVICE=eth0
ONBOOT=yes
BOOTPROTO=none
HWADDR=_mac_address_of_interface_here_
TYPE=Ethernet

Than you'd simply bring it up with "ifup eth0" command (if it was down).

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