[comp.protocols.tcp-ip.ibmpc] ka9q as a router between an ethernet and a serial line

opschk@GANGES.UCOP.EDU (06/07/91)

I am setting up the following configuration:

Gateway PC (Dopey) has a wd8003 ethernet card connected to the 141 subnet.
Client PC (Sleepy) connected via an RS-232 cable to Gateway, the conection is
from com2 to com2 . Both PC's are diskless 286's with 1 Flopy Drive and 512k
of memory.

These are the configuration files:

Gateway:
-----------------
hostname dopey.ucop.edu
ip address [128.48.144.8]
attach asy 0x2f8 3 ppp nt2 8092 576 9600 # this is com2 on 144 subnet
ip address [128.48.141.8]
attach packet 0x65 nt1 10 1500 # this is on the 141 subnet

ifconfig nt1 netmask 0xffffff00 ip 128.48.141.8 broadcast 128.48.141.255
ifconfig nt2 netmask 0xffffff00 ip 128.48.144.8 broadcast 128.48.144.255

route add [128.48.141]/24 nt1
route add [128.48.144]/24 nt2
route add default nt1 [128.48.141.100]
# incorporate the local nameserver for lookups
#
domain addserver [128.48.141.1]  #nile
# for broadcasts to work!
#
arp add [128.48.141.255] ether ff:ff:ff:ff:ff:ff
arp add [128.48.144.255] ether ff:ff:ff:ff:ff:ff
# some standard parameters

ip ttl 255 # was 16
tcp mss 1024 # was 216
tcp window 4096 # 1500
#
# start up the servers
start telnet
start smtp
start ftp
start echo
start discard
start finger
start rip
rip add [128.48.141.255] 30 1
rip add [128.48.144.255] 30 1
#
domain cache size 150
domain suffix ucop.edu

Client:
-------------------


hostname sleepy.ucop.edu
ip address [128.48.144.2]
attach asy 0x2f8 3 ppp nt1 8092 576 9600 # this is com2 on 144 subnet
ifconfig nt1 netmask 0xffffff00 ip 128.48.144.2 broadcast 128.48.144.255

route add [128.48.144]/24 nt1
route add default nt1 [128.48.144.8]
# incorporate the local nameserver for lookups
#
domain addserver [128.48.141.1]  #nile
#
# for broadcasts to work!
arp add [128.48.144.255] ether ff:ff:ff:ff:ff:ff
# some standard parameters

ip ttl 255
tcp mss 1024
tcp window 4096
#
# start up the servers
start telnet
start smtp
start ftp
start echo
start discard
start finger
start rip
rip add [128.48.144.255] 30 1
#
domain cache size 150
domain suffix ucop.edu


from nile( 128.48.141.1 ) I can ping 141.8 and 144.8, but I can't ping
144.2 ( client ). Upon turning the traces on, nothing is recorded, when I
ping 144.2 from 144.8 or vice-versa.

If, I change ppp to slip, I still can't ping 144.2, but whenthe tracing is on,
there is rip output on 144.8 and it is received by 144.2, 144.2 does not
generate any rip output. If I ping 144.2( client ) from 144.8/141.8, the trace
shows output being sent, received by 144.2, 144.2 sends a packet and it's never
received by 144.8 . If I ping 144.8 from 144.2, there is output being sent from
144.2( client ) and it is never received by 144.8 (gateway). In this case, it's
clear that the link 144.8 -> 144.2 is working but 144.2 -> 144.8 is not.

My purpose of doing this to test the routing between an ethernet and a serial
line. Is that the best way to do it ?
Any suggestions as to why the current settings are not working?


			Many Thanks in Advance
			Camille Kayruzian, opschk@ganges.ucop.edu
			415 987 03 62