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Bronze

show interface

This is from a Cat L3 switch. The interface is a L3 interface (it has an IP address assigned). So I understand the L3 Switched numbers below. What I don't understand is what kind of packets are L2 Switched on a L3 interface?

L2 Switched: ucast: 30699748 pkt, 2424085658 bytes - mcast: 5488306 pkt, 484304471 bytes

L3 in Switched: ucast: 2467261715 pkt, 174547700256 bytes - mcast: 2 pkt, 165 bytes mcast

L3 out Switched: ucast: 261213161 pkt, 161985629560 bytes

2 REPLIES
Silver

Re: show interface

Hi Jamey,

There is nothing called as Layer 2 interface or Layer 3 interface. I agree that LAN switch is a layer 2 device and it need not requiere an IP address for its functioning. The only reason why IP address given to a switch is that it comes handy to remotely manage the switch ( like telnet ) when the console ports on switch cannot be accessed.

Bronze

Re: show interface

The above data is from a CAT 6500 which is a Layer-3 switch. On Layer-3 switches each ethernet port can be a Layer 2 port (like a normal switch) or a Layer 3 port (like a router), much like the CAT 3550. My question was I see Layer 2 switched packets on an interface defined as Layer 3 and was wondering what kind of packets those would be.

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