Forum Discussion
Type11_8030
Nimbostratus
NimbostratusStrange traceroute behavior to Virtual Sever VIP
Hello, I have a self-ip on my BigIP running 9.x that is 10.7.24.1/22. When I do a traceroute from a machine behind it on the 10.7.25.x network (or 24 network for that matter) I see multiple hops but all to the BigIP self-ip
For reference 10.7.25.200 is the Virtual Server IP and 10.7.24.1 is the self-ip of the Big IP and the default route of the machine doing the traceroute.
traceroute to 10.7.25.200 (10.7.25.200), 30 hops max, 40 byte packets
1 10.7.24.1 (10.7.24.1) 0.527 ms 0.156 ms 0.147 ms
2 10.7.24.1 (10.7.24.1) 0.221 ms 0.244 ms 0.284 ms
3 10.7.24.1 (10.7.24.1) 0.236 ms 0.282 ms 0.279 ms
4 10.7.24.1 (10.7.24.1) 0.363 ms 0.402 ms 0.350 ms
5 10.7.24.1 (10.7.24.1) 0.484 ms 0.405 ms 0.405 ms
6 10.7.24.1 (10.7.24.1) 0.484 ms 0.541 ms 0.522 ms
7 10.7.24.1 (10.7.24.1) 0.608 ms 0.662 ms 0.653 ms
8 * 10.7.24.1 (10.7.24.1) 1.230 ms 1.409 ms
9 10.7.24.1 (10.7.24.1) 0.884 ms 0.771 ms 1.342 ms
10 10.7.24.1 (10.7.24.1) 0.834 ms 0.848 ms 1.478 ms
11 10.7.24.1 (10.7.24.1) 0.960 ms * 1.126 ms
12 10.7.24.1 (10.7.24.1) 1.001 ms 1.637 ms 0.973 ms
13 10.7.24.1 (10.7.24.1) 1.582 ms 1.345 ms 0.978 ms
14 * 10.7.24.1 (10.7.24.1) 1.594 ms 1.534 ms
15 10.7.24.1 (10.7.24.1) 1.435 ms 2.354 ms 1.226 ms
16 10.7.24.1 (10.7.24.1) 1.334 ms * 2.599 ms
17 10.7.24.1 (10.7.24.1) 1.392 ms 1.387 ms 1.347 ms
18 10.7.24.1 (10.7.24.1) 2.345 ms * 2.280 ms
19 10.7.24.1 (10.7.24.1) 1.515 ms 2.090 ms 1.468 ms
20 * 10.7.24.1 (10.7.24.1) 2.431 ms 1.990 ms
21 10.7.24.1 (10.7.24.1) 1.939 ms 2.094 ms *
22 10.7.24.1 (10.7.24.1) 2.459 ms 2.030 ms 2.721 ms
23 10.7.24.1 (10.7.24.1) 1.707 ms * 2.866 ms
24 10.7.24.1 (10.7.24.1) 2.264 ms 2.013 ms *
25 10.7.24.1 (10.7.24.1) 2.709 ms 2.041 ms 2.701 ms
26 * 10.7.24.1 (10.7.24.1) 2.567 ms 2.628 ms
27 10.7.24.1 (10.7.24.1) 2.443 ms * 2.383 ms
28 10.7.24.1 (10.7.24.1) 2.060 ms 2.580 ms *
29 10.7.24.1 (10.7.24.1) 2.421 ms 2.248 ms 2.452 ms
30 * 10.7.24.1 (10.7.24.1) 2.661 ms 2.357 ms
when I traceroute to the self-ip and not the Virtual Server IP I do not see this
traceroute 10.7.24.1
traceroute: Warning: Multiple interfaces found; using 10.7.24.3 @ bge1
traceroute to 10.7.24.1 (10.7.24.1), 30 hops max, 40 byte packets
1 10.7.24.1 (10.7.24.1) 2.898 ms 0.546 ms 1.084 ms
when I traceroute to machines behind it it does not do this
traceroute: Warning: Multiple interfaces found; using 10.7.24.3 @ bge0
traceroute to 10.7.24.4 (10.7.24.4), 30 hops max, 40 byte packets
1 10.7.24.4 (10.7.24.4) 0.872 ms 0.259 ms 0.221 ms
Any ideas for the strange traceroute?
thanks!
Type11_8030in case it helps here is netstat -rn from the BigIP
Destination Gateway Genmask Flags MSS Window irtt Iface
127.1.1.0 0.0.0.0 255.255.255.248 U 0 0 0 tmm0
10.7.15.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
127.2.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
163.176.30.0 10.7.2.1 255.255.255.0 UG 0 0 0 external
10.7.0.0 0.0.0.0 255.255.252.0 U 0 0 0 external
10.7.24.0 0.0.0.0 255.255.252.0 U 0 0 0 internal
127.0.0.0 - 255.0.0.0 ! - - - -
0.0.0.0 10.7.2.1 0.0.0.0 UG 0 0 0 external
0.0.0.0 10.7.15.1 0.0.0.0 UG 0 0 0 eth0
Mark_62387If you have a Ip forwarder VIP configured, you need to exclude the IP address you are using for the standard VIPs.