>>101です
現在の手元の資料でrtx1000の設定です
# RTX1000 Rev.7.01.16 (Tue Jul 22 19:41:01 2003)
#
# IP configuration
ip routing on
ip route default gateway 192.168.1.253
ip route xxx.xxx.xxx.x29 gateway 192.168.1.4
ip route xxx.xxx.xxx.x30 gateway 192.168.1.4
# LAN configuration
ip lan1 address 192.168.1.247/24
ip lan1 nat descriptor 1
ip lan2 address 192.168.100.254/24
# PP configuration
pp disable all
# TUNNEL configuration
tunnel disable all
# NAT Descriptor configuration
nat descriptor type 1 masquerade
nat descriptor address outer 1 192.168.1.246
# TFTP configuration
tftp host 192.168.100.215