[c-nsp] C3750E 10GE Interface: Problem with L2 broadcast/ARP

[Kevin Graham]

What's the STP state for this interface on the VLAN in question? There's not much information to go on but this would be both expected and correct if it's blocking.

[sent from my mobile]

On May 6, 2010, at 7:46 AM, "Christian Schuler" <cschuler at pironet-ndh.com> wrote:

Hi,

I'm debugging for some time on a problem with ARP resolution in our
datacenter environment. I found out that ARP requests are not forwarded
on one particular 10GE trunk interface, which is therefore unusable.
With a monitor and wireshark I see the ARP request coming in and going
out on all other ports, but not on Te1/0/2. Actually there are no L2
broadcast packets at all on this port.

We already made a software upgrade on the switch, with no improvement,
now we run:
WS-C3750E-48TD     12.2(52)SE

Has anybody an idea what is wrong ?

Port config is:
interface TenGigabitEthernet1/0/2
switchport trunk encapsulation dot1q
switchport trunk native vlan 900
switchport mode trunk
switchport nonegotiate
spanning-tree cost 200000


Christian

---------------------------------------------
PIRONET NDH Datacenter GmbH
Christian Schuler
http://www.pironet-ndh.com/itk 



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