Linux RH 5.0: Strange route table?

Linux RH 5.0: Strange route table?

Post by Alex Krowit » Thu, 12 Mar 1998 04:00:00



I'm trying get PPP working after upgrading from RedHat 4.2 to 5.0. One
lead I'm working on is some weird output from the route command
(before adding the ppp interface!):

# route -n
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
127.0.0.1       0.0.0.0         255.255.255.255 UH    0      0      2   lo
127.0.0.0       -               255.0.0.0       !     0      -      0   -

Is it my imagination, or is the route table corrupted? Does anyone
know what this might mean?

Thanks,
Alex

 
 
 

Linux RH 5.0: Strange route table?

Post by James Carlso » Thu, 12 Mar 1998 04:00:00



> I'm trying get PPP working after upgrading from RedHat 4.2 to 5.0. One
> lead I'm working on is some weird output from the route command
> (before adding the ppp interface!):

> # route -n
> Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
> 127.0.0.1       0.0.0.0         255.255.255.255 UH    0      0      2   lo
> 127.0.0.0       -               255.0.0.0       !     0      -      0   -

> Is it my imagination, or is the route table corrupted? Does anyone
> know what this might mean?

That's a standard Linucism.  You're seeing a loopback interface route
to 127.1 (as expected) plus a black hole route for the bogus 127.0/8
network.  This is done so that if you install a default route on your
system, you won't accidentally attempt to forward 127.x junk through
the default route.  You'll get "network is unreachable" instead.

(Try doing "ping 127.1" and "ping 127.2".)

--

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Lexington MA  02173-7999 / USA          42.423N    Fax:  +1 781 402 8092
"PPP Design and Debugging" ------- http://id.wing.net/People/carlson/ppp

 
 
 

Linux RH 5.0: Strange route table?

Post by Jim » Sat, 21 Mar 1998 04:00:00


There is a serious change in ppp from 4.0 to 5.0 -- be sure to read the
README and the README.linux files installed in the ppp directory.


>I'm trying get PPP working after upgrading from RedHat 4.2 to 5.0. One
>lead I'm working on is some weird output from the route command
>(before adding the ppp interface!):

># route -n
>Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
>127.0.0.1       0.0.0.0         255.255.255.255 UH    0      0      2   lo
>127.0.0.0       -               255.0.0.0       !     0      -      0   -

>Is it my imagination, or is the route table corrupted? Does anyone
>know what this might mean?

>Thanks,
>Alex

 
 
 

1. Multilink PPP (MLPPP), Linux RH 5.0, Bitsurfer Pro ISA

Howdy!

I've been trying to get MLPPP working from a linux box running Redhat 5.0
for a few days now.  I can connect fine over 1B, and can use the other B for
voice calls.  It's obviously (I'm assuming here so watch out) not a case of
bad SPIDs/DNs because both Bs work.

Some info:

ISDN phone co: Bell Atlantic
ISP: Buffnet (uses Ascend routers)
Linux hardware: an old Gateway 486SX/33 w/ Pentium Overdrive 83, 32M, 256k
cache, 5.4G among 3 HD's, scsi card with some external periphs, Cabletron
E21X, and 10x CD.
Linux software: kernel 2.0.34, pppd 2.3.5, all patches listed by Redhat are
applied

That leaves a few choices:


    Basically this configures the modem to use MLPPP and DOV.  FYI, the
manual I have does not list the Factory Profiles correctly.  AT&F0
configures the modem for Single-link PPP (I verified this by checking the
relevant AT settings listed).  The dial string I use is ATD1234567&7 which
was recommended by Motorola tech support, which differs from the manual.
The manual lists two ways of dialing: after the & repeat the number; just
include the &.

2) The card isn't configured properly under linux.  Currently it is
recognized as COM3 on IRQ3 at 0x3e8 and I use setserial to configure it for
spd_vhi.  Here's my options file from /etc/ppp:

connect "chat -vf /root/mypppscr"
user <myuser>
/dev/modem
115200
-detach
modem
lcp-max-configure 30
ipcp-accept-local
ipcp-accept-remote
noipx
lock
debug
asyncmap 0x00000000
crtscts
defaultroute
noipdefault
mru 1024

Here's the chat script file:

REPORT CONNECT
ABORT BUSY
ABORT 'NO CARRIER'
'' +++ATZ

OK ATD1234567\&7 CONNECT

3) The modem has a defect or there's a problem with the line.  Inside I'm
using Cat 5.

Any ideas?  I'm going to try and get a number from Mot Tech Support where I
can attempt an MLPPP connection and they can monitor things, or have them
connect to me.  I've already done this with my ISP and no matter what I've
tried nothing happens with the 2nd B.  I will also contact BA and have them
run some tests.

Thanks!

----------------------------------------
Andrew Chaplin, Computer Operator
Information Technology Services, Canisius College
chaplina at canisius dot edu (remove devnull when replying via email)

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