Broadcast on Switch

[QUARK TARO]

I have a single switch with 24 ports which is connected to 3rd party network through an uplink. The entire network is in a single subnet/vlan with 400 nodes on 3rd party and 5 nodes on my switch. Out of 400 nodes only 10 devices from 3rd party are required to communicate to my systems.

Since the entire network is in a same broadcast domain, I see a huge arp and other broadcast messages on my switch.

Is there a way that no broadcast messages from 3rd party reach my network without vlan segregation? I can get the MAC address of 10 nodes from 3rd party which required to communicate with my 5 nodes.

In summary my switch should allow communication from 10 nodes of 3rd party with my 5 nodes and the switch should drop everything including broadcast.

[Mark Malone]

Hi

Is there a way that no broadcast messages from 3rd party reach my network without vlan segregation?

not really that's what the switch is programmed to do at layer 2  , if your getting excessive broadcasts you can stop it using storm control but if you want to stop broadcast frames you need to segregate with L3 or use another vlan to the 3rd party

you could still stop the users talking at layer 2 in same vlan anyway depending what your switches supports mac acls or vacls , or even basic switchport protected mode stop them talking to anyone in same broadcast

[QUARK TARO]

How do I set storm control on 3750 switch to prevent excessive arp broadcast?