Chapter 31Fixing Common Problems (Tasks)
This chapter contains information for troubleshooting common
problems that occur with Solaris PPP 4.0. The following topics are covered:
The sources PPP Design, Implementation, and Debugging
by James Carlson and the Australian National University's web site also have
detailed advice for PPP troubleshooting. For more information, see Professional Reference Books About PPP
and Web Sites About PPP.
Solving PPP Problems (Task Map)
Use the following
task map to quickly access advice and solutions for common PPP problems.
Table 31-1 Task Map for Troubleshooting PPP
Tools for Troubleshooting PPP
PPP links generally have three major areas
of failure: Failure of the link to be established
Poor performance of the link during regular usage
Problems that can be traced to the networks on either side
of the link
The easiest way to find out if PPP works is to run a command
over the link. Run a command such as ping or traceroute to a host on the peer's network. Then observe the results.
However, you should use PPP and UNIX debugging tools to monitor performance
of an established link or to troubleshoot a problematic link.
This section explains how to obtain diagnostic information from pppd and its associated log files. The remaining sections in this
chapter describe common problems with PPP that you can discover and fix with
the aid of the PPP troubleshooting tools.
 How to Obtain Diagnostic Information From pppd
The next procedure shows
how to view the current operation of a link on the local machine.
Become superuser on the local machine. Run pppd with
the serial device configured for PPP as the argument: # pppd /dev/ttyname debug updetach |
The next
examples show the resulting displays for a dial-up link and a leased-line
link when pppd runs in the foreground. If you run pppd debug in the background, the output that is produced is sent
to the /etc/ppp/connect-errors file.
Example 31-1 Output From a Properly Operating Dial-up Link
# pppd /dev/cua/b debug updetach
have route to 0.0.0.0/0.0.0.0 via 172.21.0.4
serial speed set to 230400 bps
Using interface sppp0
Connect: sppp0 <--> /dev/cua/b
sent [LCP ConfReq id=0x7b <asyncmap 0x0> <magic 0x73e981c8> <pcomp> <accomp>]
rcvd [LCP Ident id=0x79 magic=0x0 "ppp-2.4.0b1 (Sun Microsystems, Inc., Dec 6
2000 09:36:22)"]
Peer Identification: ppp-2.4.0b1 (Sun Microsystems, Inc., Dec 6 2000 09:36:22)
rcvd [LCP ConfRej id=0x7b <asyncmap 0x0>]
sent [LCP Ident id=0x7c magic=0x0 "ppp-2.4.0b1 (Sun Microsystems, Inc., Nov 15
2000 09:38:33)"
sent [LCP ConfReq id=0x7d <magic 0x73e981c8> <pcomp> <accomp>]
rcvd [LCP ConfAck id=0x7d <magic 0x73e981c8> <pcomp> <accomp>]
rcvd [LCP ConfAck id=0x78 <magic 0xdd4ad820> <pcomp> <accomp>]
sent [LCP ConfAck id=0x78 <magic 0xdd4ad820> <pcomp> <accomp>]
sent [LCP Ident id=0x7e magic=0x73e981c8 "ppp-2.4.0b1 (Sun Microsystems, Inc.,
Nov 15 2000 09:38:33)"]
sent [IPCP ConfReq id=0x3d <addr 0.0.0.0> <compress VJ 0f 01>]
rcvd [LCP Ident id=0x7a magic=0xdd4ad820 "ppp-2.4.0b1 (Sun Microsystems, Inc.,
Dec 6 2000 09:36:22)"]
Peer Identification: ppp-2.4.0b1 (Sun Microsystems, Inc., Dec 6 2000 09:36:22)
rcvd [IPCP ConfReq id=0x92 <addr 10.0.0.1> <compress VJ 0f 01>
sent [IPCP ConfAck id=0x92 <addr 10.0.0.1> <compress VJ 0f 01>
rcvd [IPCP ConfNak id=0x3d <addr 10.0.0.2>]]
sent [IPCP ConfReq id=0x3e <addr 10.0.0.2> <compress VJ 0f 01>]
rcvd [IPCP ConfAck id=0x3e <addr 10.0.0.2> <compress VJ 0f 01>]
local IP address 10.0.0.2
remote IP address 10.0.0.1
|
Example 31-2 Output From a Properly Operating Leased-Line Link
# pppd /dev/se_hdlc1 default-asyncmap debug updetach
pppd 2.4.0b1 (Sun Microsystems, Inc., Oct 24 2001 07:13:18) started by root, uid 0
synchronous speed appears to be 0 bps
init option: '/etc/ppp/peers/syncinit.sh' started (pid 105122)
Serial port initialized.
synchronous speed appears to be 64000 bps
Using interface sppp0
Connect: sppp0 <--> /dev/se_hdlc1
sent [LCP ConfReq id=0xe9 <magic 0x474283c6><pcomp> <accomp>]
rcvd [LCP ConfAck id=0xe9 <magic 0x474283c6><pcomp> <accomp>]
rcvd [LCP ConfReq id=0x22 <magic 0x8e3a53ff><pcomp> <accomp>]
sent [LCP ConfReq id=0x22 <magic 0x8e3a53ff><pcomp> <accomp>]
sent [LCP Ident id=0xea magic=0x474283c6 "ppp-2.4.0b1 (Sun Microsystems, Inc., Oct
22 2001 14:31:44)"]
sent [IPCP ConfReq id=0xf7 <addr 0.0.0.0> <compress VJ Of o1>]]
sent [CCP ConfReq id=0x3f <deflate 15> <deflate(old#) 15> <bsd v1 15>]
rcvd [LCP Ident id=0x23 magic=0x8e3a53ff "ppp-2.4.0b1 (Sun Microsystems, Inc., Oct
22 2001 14:31:44)"]
Peer Identification: ppp-2.4.0b1 (Sun Microsystems, Inc., Oct 22 2001 14:31:44)
rcvd [IPCP ConfReq id=0x25 <addr 10.0.0.1> <compress VJ Of 01>]
sent [IPCP ConfAck id=0x25 <addr 10.0.0.1> <compress VJ Of 01>]
rcvd [CCP ConfReq id=0x3 <deflate 15> <deflate(old#) 15 <bsd v1 15>]
sent [CCP ConfAck id=0x3 <deflate 15> <deflate(old#) 15 <bsd v1 15>]
rcvd [IPCP ConfNak id=0xf8 <addr 10.0.0.2>]
rcvd [IPCP ConfReq id=0xf7 <addr 10.0.0.2> <compress VJ Of 01>]
rcvd [CCP ConfAck id=0x3f <deflate 15> <deflate(old#) 15 <bsd v1 15>]
Deflate (15) compression enabled
rcvd [IPCP ConfAck id=0xf8 <addr 10.0.0.2> <compress VJ Of 01>]
local IP address 10.0.0.2
remote IP address 10.0.0.1
|
|
Previous Contents Index Next 