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From: opschk@GANGES.UCOP.EDU
Newsgroups: comp.protocols.tcp-ip.ibmpc
Subject: Seeking help with ka9q as a router between 2 subnets
Message-ID: <9105292222.AA27607@ganges.ucop.edu>
Date: 29 May 91 22:22:28 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 109


I have setup 2  286's in the following configuration:

dopey has 2 ethernet cards: 1 connected to the 141 subnet, with an ip adress of
128.48.141.8, the other to the 144 subnet with an ip adress of 128.48.144.1
this is its autoexec file:

hostname dopey.ucop.edu
attach packet 0x66 nt2 3 1500 # this is on the 144 subnet
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 128.48.144.1 broadcast 128.48.144.255

route add 128.48.141.0/24 nt1
route add 128.48.144.0/24 nt2
#
# 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 16
tcp mss 216
tcp window 1500
#
# start up the servers
#
start telnet
start smtp
start ftp
start echo
start discard
start rip
#
#
domain cache size 150
domain suffix ucop.edu
route add default nt1 128.48.141.100


tintin has 1 ethernet card connected to the 144 subnet with an ip adress of
128.48.144.2, its autoexec file is:

hostname tintin.ucop.edu
attach packet 0x65 nt1 10 1500 # this is on the 144 subnet

ifconfig nt1 netmask 0xffffff00 ip 128.48.144.2 broadcast 128.48.144.255

route add 128.48.144.0/24 nt1
#
# 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 16
tcp mss 216
tcp window 1500
#
# start up the servers
#
start telnet
start smtp
start ftp
start echo
start discard
start rip
#
domain cache size 150
domain suffix ucop.edu
route add default nt1 128.48.141.100

dopey is supposed to act as a gateway 144 <-> 141

From other hosts, I can ping 128.48.141.8 (dopey's adress on the 141 subnet),
but I can't ping any host on the 144 subnet.

I turned the trace on . So if ping 128.48.144.1 (dopey) from 128.48.144.2
(tintin), from 144.2 I get the following output:
Wed May 29 12:18:59 1991 - nt1 sent:
Ether: len 42 00:00:c0:c6:3f:23->ff:ff:ff:ff:ff:ff type ARP
ARP: len 28 hwtype 10 Mb Ethernet prot IP op REQUEST
sender IPaddr 128.48.144.2 hwaddr 00:00:c0:c6:3f:23
target IPaddr 128.48.144.1 hwaddr 00:00:00:00:00:00

on 144.1 I get the following input:
Wed May 29 14:14:11 1991 - nt2 recv:
Ether: len 60 00:00:c0:c6:3f:23->ff:ff:ff:ff:ff:ff type ARP
ARP: len 46 hwtype 10 Mb Ethernet prot IP op REQUEST
sender IPaddr 128.48.144.2 hwaddr 00:00:c0:c6:3f:23
target IPaddr 128.48.144.1 hwaddr 00:00:00:00:00:00

the ping is unsuccessful.

Is there something I am missing in the autoexec file ??

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