Thank you very much! Rodrigo's method solve the problem at once. There is not ICMP redirect message sent and everything becomes good. I've found another method : that is to add all addresses of Sun-1, Sun-2 to Solaris /etc/hosts file, no modification needed on Linux box. Then when ping each other, rediect message is received and ping succeed with a little delay.But, I don't understand why Solaris's ping need /etc/hosts as its telnetd and ftpd does. The last, I'd show my great thanks to you all. Best regards James Shen > On Wed, May 30, 2001 at 04:40:54PM +0800, shen jing wrote: > > > > Thank you very much. > > > > I've checked the file , they have the following content: > > > > /proc/sys/net/ipv4/conf/all/rp_filter : 1 > > /proc/sys/net/ipv4/conf/default/rp_filter: 0 > > /proc/sys/net/ipv4/conf/eth0/rp_filter: 0 > > /proc/sys/net/ipv4/conf/lo/rp_filter: 0 > > > > the ip route says: > > > > [root@xxxxxx lo]# ip route > > 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.1 > > 210.32.131.0/24 dev eth0 proto kernel scope link src 210.32.131.166 > > 127.0.0.0/8 dev lo scope link > > default via 210.32.131.1 dev eth0 > > default via 210.32.131.1 dev eth0 src 210.32.131.166 metric 1 > > [root@xxxxxx lo]# > > > > I don't understand what's the files under all/ and default/ for. > > And the tcpdump on linuxbox and snoop on Sun both shows > > icmp echo request and icmp echo reply has been received. > > But why 'ping 210.32.131.97' always show nothing when executed > > on 192.168.1.8? > > It might be that the linux router sends you ICMP redirects as the > forwarding interface is the same as the incoming interface but > it also should've happened when you "ping 192.168.1.8 "on Sun-1. > > How did you create eth0:0? With "ifconfig" or "ip addr"? > What is the output of "ifconfig -a"? Do you see 210.32.131.166 > as eth0:0 (meaning that it is an alias? If you'd created it with > "ip addr" you shouldn't have had ":0" there. > > I'd suggest you to send the output of tcpdump when you > "ping 210.32.131.97" on Sun-2 to see what is going on. > > Ramin > > > > > > > > > James Shen
