troubleshooting Lab3

[Kayla Smith]

I wasn't able to ping out of Sauron (my Mordor host). I was wondering if someone could look at my routing table and see if there was anything that looked obviously wrong with it.

root@sauron:~# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.3.0 192.168.3.1 255.255.255.0 UG 0 0 0 eth0
192.168.3.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
0.0.0.0 192.168.3.1 0.0.0.0 UG 0 0 0 eth0

Also, is anyone working in the lab on Sunday want to work together?

[fred_deakin]

Hi Kayla,

Which IP address were you trying to ping to?

Fred

[Rich Simms]

root@sauron:~# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.3.0 192.168.3.1 255.255.255.0 UG 0 0 0 eth0
192.168.3.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
0.0.0.0 192.168.3.1 0.0.0.0 UG 0 0 0 eth0

No need for a static route on Sauron. Since it is at the end (like a stub network) you just need a default gateway to the router on that segment.

What ping error are you getting?

I'd also check:

Layer 1 - Sauron and the Mordor router are both cabled to same VMnet
Layer 2 - Check ARP tables or check MAC addresses with Wireshark to make sure source and destination MACs are correct.
Layer 3 - check interfaces for correct IPs, masks, and broadcast addresses, check that there is a route in the routing tables for the packet you are sending out to the destination and BACK again.

- Rich