Hi all. I have a Netra440 with 10 interfaces, the 2 onboard + 2 cards
with 4 interfaces each. I have ce2 & ce6 setup for multipathing
failover. I'm dropping packets on ce2, but when I failover I don't on
ce6. I'm really stumped about the network dropping packets. It seems
to be localized to a logical interface on the OCS.

The interfaces are connected to a switch, which is connected to a
router.

I have tried to change everything in between but it's still dropping:
The tests I ran included:
1) Changed the physical interface to ce2 - moved the cable to another
unused interface on the server. Eliminates possbility it's the network
card interface
2) Changed cables - eliminates bad cable possbility
3) Changed ports on switch - elimates chance it's a bad port on the
router.
4) Failed over to redundant interface. ce2 and ce6 are configured as
redunant interfaces. If I pull the cable on ce2 then ce6 comes up with
the same IP. When I do this I can run a ping test I get no dropped
packets to ce6. This is the part that doesn't make any sense to me. I
don't see how it's possible for dropped packets to be linked to a
logical interface like that.

At the beginning of the tests I was manually setting ce2 to 100/full
with no autonegotiate. I did the same on the switch, but not on ce6. I
could remove the manual configuration on ce2, but I don't know what
that would gain.

Please help!

Thanks,
Ben..

On Mar 6, 12:55 pm, "bozothedeathmachine"
<bozothedeathmach...@gmail.com> wrote:

> At the beginning of the tests I was manually setting ce2 to 100/full
> with no autonegotiate. I did the same on the switch, but not on ce6. I
> could remove the manual configuration on ce2, but I don't know what
> that would gain.

There are approximately no cases where turning off autonegotiation is
sensible. If you want to force a particular speed/duplex it is far
better to leave it on but to turn off advertising the other options.

--tim

On 6 Mar 2007 04:55:48 -0800
"bozothedeathmachine" <bozothedeathmachine@gmail.com> wrote:

> Hi all. I have a Netra440 with 10 interfaces, the 2 onboard + 2 cards
> with 4 interfaces each. I have ce2 & ce6 setup for multipathing
> failover. I'm dropping packets on ce2, but when I failover I don't on
> ce6. I'm really stumped about the network dropping packets. It seems
> to be localized to a logical interface on the OCS.
>
> The interfaces are connected to a switch, which is connected to a
> router.
>
> I have tried to change everything in between but it's still dropping:
> The tests I ran included:
> 1) Changed the physical interface to ce2 - moved the cable to another
> unused interface on the server. Eliminates possbility it's the network
> card interface
> 2) Changed cables - eliminates bad cable possbility
> 3) Changed ports on switch - elimates chance it's a bad port on the
> router.
> 4) Failed over to redundant interface. ce2 and ce6 are configured as
> redunant interfaces. If I pull the cable on ce2 then ce6 comes up with
> the same IP. When I do this I can run a ping test I get no dropped
> packets to ce6. This is the part that doesn't make any sense to me. I
> don't see how it's possible for dropped packets to be linked to a
> logical interface like that.
>
> At the beginning of the tests I was manually setting ce2 to 100/full
> with no autonegotiate. I did the same on the switch, but not on ce6. I
> could remove the manual configuration on ce2, but I don't know what
> that would gain.
>
> Please help!
>
> Thanks,
> Ben..
>
Hi
Maybe running these scripts may help in pin pointing some differences?
http://www.sun.com/bigadmin/jsp/desc...network_config
http://www.sun.com/bigadmin/jsp/desc...heck__determin

--
Cheers Malcolm °¿° (Linux Counter #276890)
SLED 10.0 x86_64 Kernel 2.6.16.27-0.9-smp
up 10 days 13:01, 4 users, load average: 0.17, 0.18, 0.10

bozothedeathmachine wrote:
> Hi all. I have a Netra440 with 10 interfaces, the 2 onboard + 2 cards
> with 4 interfaces each. I have ce2 & ce6 setup for multipathing
> failover. I'm dropping packets on ce2, but when I failover I don't on
> ce6. I'm really stumped about the network dropping packets. It seems
> to be localized to a logical interface on the OCS.
>
> The interfaces are connected to a switch, which is connected to a
> router.
>
> I have tried to change everything in between but it's still dropping:
> The tests I ran included:
> 1) Changed the physical interface to ce2 - moved the cable to another
> unused interface on the server. Eliminates possbility it's the network
> card interface
> 2) Changed cables - eliminates bad cable possbility
> 3) Changed ports on switch - elimates chance it's a bad port on the
> router.
> 4) Failed over to redundant interface. ce2 and ce6 are configured as
> redunant interfaces. If I pull the cable on ce2 then ce6 comes up with
> the same IP. When I do this I can run a ping test I get no dropped
> packets to ce6. This is the part that doesn't make any sense to me. I
> don't see how it's possible for dropped packets to be linked to a
> logical interface like that.
>
> At the beginning of the tests I was manually setting ce2 to 100/full
> with no autonegotiate. I did the same on the switch, but not on ce6. I
> could remove the manual configuration on ce2, but I don't know what
> that would gain.
>
> Please help!
>
> Thanks,
> Ben..
>

Try letting your interfaces autoconfigure. In most situations it is the
recommended and supported way to get it right.

Some older hardware has problems with autoconfiguration. Only if you
are SURE that this is the case with your hardware should you configure
manually.

Ok. I've reset the the interface to autonegotiate. It comes up at 100/
full, and I'm still dropping packets.

362 packets transmitted, 289 packets received, 20% packet loss
round-trip (ms) min/avg/max = 0/3/1001

Any other ideas?

Thanks for the 1st round if responses.

bozothedeathmachine wrote:
> Ok. I've reset the the interface to autonegotiate. It comes up at 100/
> full, and I'm still dropping packets.
>
> 362 packets transmitted, 289 packets received, 20% packet loss
> round-trip (ms) min/avg/max = 0/3/1001
>
> Any other ideas?
>
> Thanks for the 1st round if responses.
>

Are BOTH ends of the link set to autonegotiate? Did they negotiate to
the same speed and duplex? If BOTH show as 100/full you have eliminated
speed/duplex errors as a problem.

I hope you didn't do anything REALLY stupid like wrapping a few turns of
the cable around a fluorescent light or a big tranformer. :-)