Wireless Access

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Access network design for branch, remote, outdoor, and campus locations with HPE Aruba Networking access points and mobility controllers.
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Issue with drop broadcast and multicast traffic

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  • 1.  Issue with drop broadcast and multicast traffic

    Posted Aug 26, 2013 09:29 AM

    Hi all,

     

    Initially i had lot of issues with client connectivities, then to increase the peroformance i have enabled drop broadcast and multicast option in WAP profile.

     

    Now as i enable that option, i am unable to print from IPAD. Printer and IPAD are in different subnets. As MAC OS uses mDNS for discovery process. Now i need to disable drop broadcast and multicast  option.

     

    Now i am worried, if i disable that option. i guess there would be vlan flooding ?? how to achieve printing without having lot of broadcast and multicast traffic??????



  • 2.  RE: Issue with drop broadcast and multicast traffic

    Posted Aug 26, 2013 11:04 AM

    Yes, "Enabling broadcast-filter all broadcast-filter arp" will also drop any multcast which includes your mdns traffic.

    Find the screen shot for the same.

     

    You could still enable the "convert broadcast arp request to unicast " converting arp request to unicast.

     

    bcmc.JPG

     

     

    May i know the size of your VLAN? What is the uplink configuration on the controller?

    You can write the acl to drop the other broadcast traffic like SSDP, netbios allowing mdns and any other traffic which we need.

     

    Thanks!

     



  • 3.  RE: Issue with drop broadcast and multicast traffic

    Posted Aug 27, 2013 05:16 AM

    my vlan size is /24 and in the uplink to the controller is 10G

     

    interface gigabitethernet 1/1
    description "GE1/1"
    trusted
    trusted vlan 1-4094
    switchport mode trunk
    switchport trunk allowed vlan's



  • 4.  RE: Issue with drop broadcast and multicast traffic

    Posted Aug 27, 2013 08:54 AM

    Hi,

     

    I have disabled drop multicast and broadcast option, now ipad is detecting the printer. But it is detecting sometimes. sometimes its showing cannot find air printers . :(



  • 5.  RE: Issue with drop broadcast and multicast traffic

    Posted Aug 28, 2013 08:24 AM

    There are some additional options available in the latest releases.  The airgroup feature allows you to use the controller to limit mDNS (bonjour) as well as allows you to forward it across vlans.  I have not implemented this yet but my understanding is you can enable the drop broadcast/multicast and enable airgroup and you will be able to see the printers from the ipad on a different subnet. A sample airgroup pdf link is included below.

     

    http://www.google.com/url?sa=t&rct=j&q=aruba%20airgroup&source=web&cd=2&cad=rja&ved=0CDIQFjAB&url=http%3A%2F%2Fwww.arubanetworks.com%2Fpdf%2Ftechnology%2FTB_AirGroupWLANServices.pdf&ei=0eodUqqbOuiysQTHroDoCg&usg=AFQjCNHuC70XVgGLBQtxedOYyJOq7WIf-Q&bvm=bv.51156542,d.cWc

     

     

    Thanks,

     

    Ian