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glenn77

1 Rookie

 • 

68 Posts

30386

November 18th, 2005 01:00

Block multicast

How do I stop my 5324 and 6024f switches from forwarding multicasts
It also seems to be broadcasting packets as well
 
thks
Glenn

sentinel-master

345 Posts

November 21st, 2005 21:00

Multcast packets begin with MAC Layer OUI of 01-00-5E-xx-xx-xx and are meant to be forwarded by layer 2 switches
 
With dumb Layer 2 switches - a multicast will behave like a Broadcast and go everyhwere - this is know as "flooding"
 
To prevent multicast flooding - you need to inspect the multicast packet and control the group its sending to or host is joining.
 
Turn on IGMP Snooping and this should control where the multicast packets go to

GregG1

2 Intern

 • 

812 Posts

November 22nd, 2005 10:00

Note:

IGMP Snooping requires an IGMP Querier device on the LAN to keep track of the multicast groups. The 6024 is capable of acting as an IGMP Querier when IGMP is enabled. See the following link to the online CLI Guide for IGMP command information:

<ADMIN NOTE: Broken link has been removed from this post by Dell>

Multicast Filtering should also be enabled on the 3300 series switch. See the following link to the online CLI Guide:

 

<ADMIN NOTE: Broken link has been removed from this post by Dell>

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