ADSL from SuSE 7.0, Diagnosis

Support knowledgebase (hoe_adsl_diag)

SuSE Linux: Versions since 7.0
Kernel: Version 2.2.x

Situation:

Note for SuSE 7.1 users

Procedure:

1. The command ifconfig informs you whether the Ethernet adapter is ready. The output must contain the sections lo and eth0.
   If this is not the case, the network configuration must be repeated.

2. Before you start, the output of route -n should only contain the value 0.0.0.0 in the column Gateway.
   If a default gateway is set here, the error is usually caused by one of the following situations:
   • The default gateway is the interface eth0:
     A default gateway was entered during the network configuration. -> Repeat the network configuration as described in hoe_adsl_pppoe.html.
   • The default gateway is the interface ippp0:
     You use an ISDN adapter and activated "auto" under "Dial mode".
     Repeat the ISDN configuration and select "manual" for "Dial mode".

   Alternatively, the default gateway problem can be circumvented by entering the option

   replacedefaultroute
   

   in the file /etc/ppp/peers/pppoe.

3. Start pppoed with the debug option:
   pppoed -C pppoe -D -d 9

4. When a connection is established, pppoed sends messages to the terminal window and writes them to the syslog file (/var/log/messages).

5. pppd only sends its messages to the syslog file.
   Start
   tail -f /var/log/messages before you establish a connection, in order to view the messages in the syslog file. The following stages should be achieved:
   1. Dec 24 00:00:00 Earth pppd[11205]: pppd 2.3.10 started by hoe, uid 0
      => our pppd started
   2. Dec 24 00:00:00 Earth pppd[11205]: sent [LCP ConfReq id=0x1 ]
      => our pppd sends packets
   3. Dec 24 00:00:00 Earth pppd[11205]: rcvd [LCP ConfReq id=0x1 ]
      => the other side sends packets
   4. Dec 24 00:00:00 Earth pppd[11205]: rcvd [IPCP ConfAck id=0x1 ]
      => the authentication was successful
   5. Dec 24 00:00:00 Earth pppd[11205]: local IP address 192.168.1.1
      => the IP addresses were assigned dynamically
   6. Dec 24 00:00:00 Earth pppd[999]: Script /etc/ppp/ip-up started (pid1010)
      

6. By now, pppd should have appended a gateway entry to the routing table. You can check this with route -n.

7. If your provider supports dynamic IP assignment, the file /etc/resolv.conf should contain valid name server entries.
   Example:
   nameserver 194.25.2.129 (for T-Online in Germany; replace with your provider's name server)

8. Test your access with
   ping -c10 213.95.15.204
   and subsequently
   ping -c10 www.suse.de
   If this works, you are connected to the Internet.

• You can view the transmitted packets with
  tcpdump ether proto 0x8863 '||' ether proto 0x8864

  The output should look somewhat like the following:
  18:11:28.478641 0:0:1c:b5:74:38 Broadcast 8863 60:
1109 0000 0004 0101 0000 0000 0000 0000
0000 0000 0000 0000 0000 0000 0000 0000
0000 0000 0000 0000 0000 0000 0000

  Please also check the URL http://www.suse.de/~bk/PPPoE-project.html

• Since the software is still in the test phase, bugs may have been eliminated in the latest version, which you can get from
  http://www.davin.ottawa.on.ca/pppoe/

• Information on PPPoE and additional solutions for PPPoE is provided at
  http://www.suse.de/~bk/PPPoE-project.html

• The package documentation is available under /usr/doc/packages/pppoed/ on your server.

ADSL with Linux and PPP over Ethernet(PPPoE)

T-DSL and ADSL with SuSE Linux 7.1 and kernel 2.4