Solved

Local networks where multicast is not supported

Posted on 2006-11-29
6
344 Views
Last Modified: 2010-04-10


How often it can happens?

We use multicast to find other clients in the local network.

Windows network only if it make a sense.
0
Comment
Question by:cdesigner
  • 3
  • 2
6 Comments
 
LVL 57

Expert Comment

by:giltjr
ID: 18042858
What?  I am not sure I understand.

All local networks should support Multicast.  However in order to receive a multicast packet, you must have something that is listening on a specific multicast address.
0
 
LVL 9

Author Comment

by:cdesigner
ID: 18044626
I just want to know,  any possibility that some of our clients does not support multicast in the local network.
Is it possible at all? That the local network does not support multicast.
Maybe some old hardware may cause this problems ( routers, hubs, switches etc. )?

Currently we use broadcast ( and multicast as an option ), but we think to set multicast by default and we want to know about any possible problems.
0
 
LVL 57

Expert Comment

by:giltjr
ID: 18045220
HUB would cause no problem as they are only electronic switches, no smarts, no frame or packet inspection.

Older layer 2 switches would also cause no problem as they do not look any further than the layer 2 headers.

Newer switches, layer 3 switches could be configured to block multicast packets, but they would have to be configured that way on purpose.  Most routers do not router multicast packets.

You should encounter about the same issues with broadcast.  Broadcasts can not cross routers, thus they can't cross physical LAN segments or logical (VLAN's).  
0
Zoho SalesIQ

Hassle-free live chat software re-imagined for business growth. 2 users, always free.

 
LVL 9

Author Comment

by:cdesigner
ID: 18047201
router not a problem. ok, I will try again ;)

We use broadcast now. Is it possible that somewhere broadcast will work but multicast not? ( without any special attention to switch configuration )
0
 
LVL 57

Accepted Solution

by:
giltjr earned 200 total points
ID: 18047946
Off hand I can't think of a "normal" situation where broadcast would work, but multicast would not.
0
 
LVL 4

Expert Comment

by:Trilotech
ID: 18050448
If you are talking about a multicast from your office that you want someone else to get from a remote office via the internet, then you will have problems as the internet does not widely support multicast.

For multicast to work everything would need to be internal.
0

Featured Post

VMware Disaster Recovery and Data Protection

In this expert guide, you’ll learn about the components of a Modern Data Center. You will use cases for the value-added capabilities of Veeam®, including combining backup and replication for VMware disaster recovery and using replication for data center migration.

Join & Write a Comment

Suggested Solutions

Title # Comments Views Activity
SSL RA VPN 7 75
MAC Access List to Block DHCP Traffic on a Cisco SG500 19 35
Use of Training Budget 12 67
mini spy rotating camera 3 13
Hello All, I have been training on Multicast for a while now and whenever I start the topic , I find out that my friends /  Colleagues mention that they do not know how to test Multicast Joins. As most of the multicast would be video traffic and …
Every server (virtual or physical) needs a console: and the console can be provided through hardware directly connected, software for remote connections, local connections, through a KVM, etc. This document explains the different types of consol…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…

708 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now