4) is there any Qos difference between WS-X6816-10G-2T and WS-X6816-10G-2TXL? 5) is there any Qos difference between MSFC5 PFC4 and MSFC5 PFC4XL? .. 7) Pls share more about Central and Distributed Switching in Sup2T and which card support Distributed...

Hi Halima,The error is most likely a parity problem on the supervisor engine. This can be transient and recovered through software, or may be a hardware parity error that can cause a crash if it continues. There is more information here CSCsg28982 wh...

Sup1A should have MSFC1 which can run IOS, follow the steps and make sure you format bootflash at the end:http://www.cisco.com/en/US/products/hw/switches/ps708/products_tech_note09186a008015bfa6.shtml#conv_msfc_1Its old, but it should still work/ijay

Its most likely the downstream switch is originating the TCN and then a corresponding configuration BPDU is received. Unfortunately there's nothing on the originating switch to tell you it has generated the TCN. This is where detective work comes int...