iDRAC 9 Diagnostics
The iDRAC web interface confuses me, so I noted where to find the diagnostic commands.
Use this path through the drop-down menu at the top of the window:
Dashboard » System » Storage » Configuration » Maintenance » iDRAC Settings
The Diagnostics Console Command is under Maintenance and Diagnostics.
The commands are:
arp
usage: arp
Displays the ARP table. In my case:
fe80::abcd:xxxx:xxxx:abcd dev bond0 lladdr 12:xx:xx:xx:34
fe80::abcd:xxxx:xxxx:abcd dev bond0 lladdr 12:xx:xx:xx:34 router REACHABLE
or:
fe80::abcd:xxxx:xxxx:abcd dev bond0 lladdr 12:xx:xx:xx:34 router DELAY
Whether it is REACHABLE or DELAY doesn’t matter much. More on ARP here.
ifconfig
Displays info about a network interface.
usage: ifconfig
bond0 Link encap:Ethernet HWaddr F4:EE:08:XX:XX:XX
inet6 addr: 2001:718:1:fff0:XXXX:XXXX:XXXX:XXXX/64 Scope:Global
inet6 addr: fe80::f52c:2f7d:XXXX:XXXX/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1749 errors:0 dropped:0 overruns:0 frame:0
TX packets:2801 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3259327 (3.1 MiB) TX bytes:1492890 (1.4 MiB)
netstat
usage: netstat
Displays the routing table:
Kernel IPv6 routing table
Destination Next Hop Flags Metric Ref Use Iface
::1/128 :: Un 0 5 0 lo
::1/128 :: U 256 1 0 lo
2001:xxx:1:xxxx::/64 :: UA 256 2 0 bondX
fe80::xxxx:xxxx:xxxx:xxxx/128 :: Un 0 3 0 bondX
fe80::/64 :: U 256 1 0 bondX
ff00::/8 :: U 256 4 0 bondX
::/0 fe80::xxxx:xxxx:xxxx:xxxx UGDA 1024 2 0 bondX
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 127.0.0.1:xxxxx 127.0.0.1:4xxx TIME_WAIT
tcp 0 0 127.0.0.1:xxxxx 127.0.0.1:4xxx TIME_WAIT
tcp 0 0 127.0.0.1:xxxxx 127.0.0.1:4xxx ESTABLISHED
tcp 0 0 127.0.0.1:xxxxx 127.0.0.1:4xxx TIME_WAIT
tcp 0 0 2001:xxx:1:xxxx::xxxx:xxxx 2001:xxx:1:x::xx:xxxx ESTABLISHED
tcp 0 0 ::ffff:127.0.0.1:443 ::ffff:127.0.0.1:xxxxx ESTABLISHED
This line is the interesting one:
::/0 fe80::xxxx:xxxx:xxxx:xxxx UGDA 1024 2 0 bondX
The IPv6 address after ::/0 is the default gateway. The UGDA flags mean:
U - the route is up
G - the route is to a Gateway
D - it’s Dynamically created (by a routing daemon or DHCP)
A - it’s installed by an ICMP redirect (by the router)
ping and ping6
usage:
ping6 2001:4860:4860::8888
ping 1.1.1.1
These commands verify connectivity to a destination address.
gettracelog
Shows a log of network communication. It wasn’t as helpful as I hoped when I had DNS issues.