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Port Errors - rxNoPacketBufferCount

I am seeing Rcv Errs on some our copper gig ports on a WS-X4448-GB-RJ45 module. The card is pretty full . Only 5 or six hosts are getting the erors.

A show port list the errors as Rcv Errs. A show port counter lists the errors as rxNoPacketBufferCount. The Rcv Err count and the rxNoPacketBufferCount count are the same.

I do not see any other errors (CRC, undersize, oversizce, jabber) on the port.

Could anyone point me in the right directinon on what might be causing the rxNoPacketBufferCount errors?

Thanks.

Don

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New Member

Re: Port Errors - rxNoPacketBufferCount

Cisco defines this as the number of received "no packet buffer" packets.

This is the number of times that no packet buffer was available to store an incoming packet. In this condition, the router or L3 switch drops the complete packet.

I have a hunch that the X4448, being only having 6Gbps of shared bandwidth to the switching fabric, is probably being oversubscribed and eventually running out of rx buffers. This is especially true if you have a number of hosts/servers/uplinks running 1000BaseT.

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