traceroute issue
Hi experts,
I met an issue regarding traceroute.
When I set default route, I can trace all paths.
[root@localhost ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.44.2 0.0.0.0 UG 0 0 0 eno16777736 169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eno16777736 192.168.44.0 0.0.0.0 255.255.255.0 U 0 0 0 eno16777736 [root@localhost ~]# traceroute -I 172.25.252.129 traceroute to 172.25.252.129 (172.25.252.129), 30 hops max, 60 byte packets 1 192.168.44.2 (192.168.44.2) 0.089 ms 0.057 ms 0.045 ms 2 172.27.226.254 (172.27.226.254) 36.412 ms 36.620 ms 36.645 ms 3 172.25.252.129 (172.25.252.129) 24.081 ms 24.685 ms 24.663 ms
If I do not set default route but using static routes, I can not trace all paths.
[root@localhost ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eno16777736 172.25.252.129 192.168.44.2 255.255.255.255 UGH 0 0 0 eno16777736 192.168.44.0 0.0.0.0 255.255.255.0 U 0 0 0 eno16777736 [root@localhost ~]# traceroute -I 172.25.252.129 traceroute to 172.25.252.129 (172.25.252.129), 30 hops max, 60 byte packets 1 192.168.44.2 (192.168.44.2) 0.185 ms 0.221 ms 0.074 ms 2 * * * ------------------- 3 172.25.252.129 (172.25.252.129) 5.753 ms 13.348 ms 13.770 ms
When I add static route for next hop (
172.27.226.254[root@localhost ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eno16777736 172.25.252.129 192.168.44.2 255.255.255.255 UGH 0 0 0 eno16777736 172.27.226.254 192.168.44.2 255.255.255.255 UGH 0 0 0 eno16777736 ------------------- 192.168.44.0 0.0.0.0 255.255.255.0 U 0 0 0 eno16777736 [root@localhost ~]# traceroute -I 172.25.252.129 traceroute to 172.25.252.129 (172.25.252.129), 30 hops max, 60 byte packets 1 192.168.44.2 (192.168.44.2) 0.143 ms 0.102 ms 0.065 ms 2 172.27.226.254 (172.27.226.254) 7.625 ms 8.337 ms 8.306 ms ------------------- 3 172.25.252.129 (172.25.252.129) 8.275 ms 8.258 ms 8.228 ms
Then, If I have multiple networks and I can only set one default route, so I must use static routes for other networks, but I can not trace all paths on these networks unless adding all next hops. How can I resolve this issue? Are there any alternative ways?
Responses