The Connect from Intel Pro/1000 T to 1000base-t Port on Catalyst 4000 (WS-X4412-2GB-T= module) Not Working Properly
The connect from Intel Pro/1000 T to 1000base-t port on Catalyst 4000 (WS-X4412-2GB-T= module) is not working properly. The Intel Pro/1000 T NIC connects to a 10/100 OK. Auto-negotiation is set at both ends. We can successfully ping across the link. However performance is so poor as to make the connection unusable.
Re: The Connect from Intel Pro/1000 T to 1000base-t Port on Cata
When an Intel Pro/1000 T NIC is connected to a Catalyst switch, the customer may see poor network connections or excessive numbers of dropped packets. The problem arises when a module with a TBI interface transmits an odd byte packet to a receiver with a Gigabit Media Independent Interface (GMII).
The interoperability issue is a result of the implementation of Carrier Extension. Carrier Extension is detailed in sub section 126.96.36.199 in the IEEE 802.3 specification. Carrier Extension can be used to pad the last byte of a packet, so the packet is aligned on an even numbered boundary.
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