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New Member

Overruns in Cisco IOS based 6500

Hi,

A server is connected to a GBIC interface of a Catalyst 6509. telnet to the server is very slow and checking the interface shows high overruns only.. Both server and switch port are working in full duplex and speed 1000 (but not hardcoded )

Regs

Kas

2 REPLIES

Re: Overruns in Cisco IOS based 6500

Overruns occur when the internal First In, First Out (FIFO) buffer of the chip is full, but is still trying to handle incoming traffic.

Data from the network will be received into the buffer, whereupon the chip will attempt to move the data from the buffer to the router's shared memory for the CPU to process. If the chip is not able to move the data from its internal FIFO buffer into shared memory faster than the rate at which data is received on the interface, then the internal FIFO buffer will be full, incoming data will be dropped, and the overrun counter will be incremented.

Try to replace the cable between the Server and switchport and also try to hardcore the Speed and duplex.

regards,

-amit singh

New Member

Re: Overruns in Cisco IOS based 6500

Hardcoding is an option I am already deploying but could not understand as to how the cable can be responsible...

Regs

Kas

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