how to determine if nic is unplugged?

fancylad · 03-08-2009, 03:51 PM

can anyone tell me the best way to determine if there is a connectivity problem with a nic on solaris 8/10. i tried pulling the network cable from my ultra 10 box and then pinged an address on my subnet and got:

Quote:

Mar 8 16:46:14 unknown genunix: WARNING: hme0: fault detected in device; service degraded
Mar 8 16:46:14 unknown genunix: WARNING: hme0: No response from Ethernet network : Link down -- cable problem?

is this the only way? is there some log file i can check, a command to use?

hedgy102 · 03-08-2009, 04:28 PM

Hi,

/sbin/mii-tool should do the trick

hedgehog@darkstar:/proc$ sudo mii-tool eth1
eth1: negotiated 100baseTx-FD, link ok

hedgy102 · 03-08-2009, 04:31 PM

Otherwise, there is also ethtool

hedgehog@darkstar:/proc$ sudo ethtool eth1
Settings for eth1:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 32
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: pumbg
Wake-on: d
Current message level: 0x00000007 (7)
Link detected: yes

TBC Cosmo · 03-08-2009, 04:55 PM

Just to add to the list...

You can also use ip address show to check the physical link

Here, I have unplugged my ethernet cable:

Code:

2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
    link/ether 00:0c:76:b3:d9:5c brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.5/24 brd 192.168.0.255 scope global eth0
    inet6 fe80::20c:76ff:feb3:d95c/64 scope link
       valid_lft forever preferred_lft forever

Then plugged it back in

Code:

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:76:b3:d9:5c brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.5/24 brd 192.168.0.255 scope global eth0
    inet6 fe80::20c:76ff:feb3:d95c/64 scope link
       valid_lft forever preferred_lft forever

hedgy102 · 03-08-2009, 05:14 PM

Also, depending on your particular need, ethtool returns link status for nics that are down.

jlliagre · 03-08-2009, 05:53 PM

I'm afraid the suggested mii-tool and ethtool are Linux specific.

Under Solaris 10 and newer, you might use "dladm show-phys". For older releases, ndd or kstat should report the network status.

hedgy102 · 03-09-2009, 02:40 AM

Oops, sorry about that. Didn't notice this was a Solaris question.