Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Collision Domain Query

Hi All,

swithes A and B are seperated by a router. 3 hosts attachred to each switch. This = 6 seperate collision domains and 2 broadcast domains, yes? Cheers.

coolboarderguy...

3 REPLIES

Re: Collision Domain Query

Hi

If u have any vlans defined on the switches then u r broadcast domians are going to increase.if they are in the same vlan then u r query is correct.

Thanks

Mahmood

Re: Collision Domain Query

Hello,

in addition to Mahmood's post: your assumptions are correct, the router limits the broadcast domains, unless the router does inter-VLAN routing, in which case you would have only one broadcast domain, provided that all switchports are configured for the same VLAN. Your collision domains would always be 6, since the physical switchport itself is the boundary for the collision domain.

Have a look at the following links as well:

Broadcast Domain

http://www.linktionary.com/b/broadcast_domain.html

Collisions and Collision Domains

http://www.linktionary.com/c/collisions.html

HTH,

GNT

Green

Re: Collision Domain Query

There are EIGHT collision domains, and two broadcast domains:

The six hosts + the two links to the routers are the collision domains, and each side of the router is a broadcast domain.

Good Luck

Scott

126
Views
5
Helpful
3
Replies
CreatePlease login to create content