UCS mac address problem

Hi all,
simple question....
may you know if, with release 1.4.1 there is some mac address learning bug?
i've go a blades with a mix of palo and other cards, some vnic are pinned to uplink with trunk and allowed vlan 501 on both side. On the UCS blades i've got ESX and ESXi. Service console is tagged to VLAN 501 (according to trunk configuration on UCS and uplink switch). Some blade had got these interface pinned on UCS6100 A and other one on B (with failover). The fact is that if i ping from outside UCS to inside UCS (ESX) no mac learning is performed on all infrastructure.
I'm sure problem is on UCS 'cause if i clear mac table on UCS nothing works......and all work if i begin to ping from UCS. I've also tried to put on uplink switch a static mac (ESX service console) but was not useful.
i hope is not a 1.4.1 bug......
tnx and tnx for help
dan

Are any of you using Uplink Pin Groups or have a disjointed Layer 2 network by chance?
Issues like these are ususally related to Pin Groups/Disjoint L2 using the wrong link as the DR port for incoming traffic. When traffic is generated from within UCS outbound, the MAC table gets updated on the upstream switch which allows traffic to flow, until it ages out.
If either of these are the case I suggest you have a look at Brad's videos, name video #6:
http://bradhedlund.com/2010/06/22/cisco-ucs-networking-best-practices/
Regards,
Robert

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Manufacturer's Name.............................. Cisco Systems Inc.
Product Name..................................... Cisco Controller
Product Version.................................. 7.6.130.0
Bootloader Version............................... 1.0.20
Field Recovery Image Version..................... 7.6.95.16
Firmware Version................................. FPGA 1.7, Env 1.8, USB console 2.2
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System Location..................................
System Contact...................................
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Redundancy Mode.................................. Disabled
IP Address....................................... 10.10.10.10
Last Reset....................................... Software reset
System Up Time................................... 25 days 2 hrs 53 mins 5 secs
System Timezone Location.........................
System Stats Realtime Interval................... 5
System Stats Normal Interval..................... 180
Configured Country............................... US - United States
Operating Environment............................ Commercial (0 to 40 C)
Internal Temp Alarm Limits....................... 0 to 65 C
Internal Temperature............................. +44 C
External Temperature............................. +22 C
Fan Status....................................... OK
State of 802.11b Network......................... Enabled
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UCS mac address problem

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