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Cisco 2960G Broadcast handling

its_peznet
Level 1
Level 1

Hi Community,

 

I have a situation where I need two hosts connected to a 2960G switch to send wire-speed broadcast traffic (all F's), between the two hosts.  The two hosts are the only devices on this isolated VLAN and there is no layer 3 interface for the switch on this vlan.  Also, storm control is disabled.

 

I am seeing a high number of packet drops on both of these ports.  This happens both with mls qos disabled, and with it enabled.

 

What I don't understand is why two ports (at 100m, I might add) that only communicate with each other, will show packet drops ever.  I would think that the switch is able to pass wire-speed 100m between 2 ports.

 

If anyone has any insight into the handling of broadcast traffic at an asic level, I would really appreciate the insight.

 

thank you

 

This leads me to suspect that the switch treats broadcast traffic differently from unicast traffic.

1 Reply 1

Hello,

 

which packets are being dropped ? Post the output of 'show interfaces x' where 'x' is one (or both) of the interfaces concerned...

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