Netgear XCM8806 Chassis User Manual - Page 282
Displaying Learning and Flooding Settings, Guidelines for Enabling or Disabling Egress Flooding
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NETGEAR 8800 User Manual In this way, the communication between client 1 and client 2 is controlled. If client 1 needs to communicate with client 2 and has that IP address, client 1 sends out an ARP request to resolve the IP address for client 2. Guidelines for Enabling or Disabling Egress Flooding The following guidelines apply to enabling and disabling egress flooding: • Egress flooding can be disabled on ports that are in a load-sharing group. In a load-sharing group, the ports in the group take on the egress flooding state of the master port; each member port of the load-sharing group has the same state as the master port. • FDB learning takes place on ingress ports and is independent of egress flooding; either can be enabled or disabled independently. • Disabling unicast (or all) egress flooding to a port also prevents the flooding of packets with unknown MAC addresses to that port. • Disabling broadcast (or all) egress flooding to a port also prevents the flooding of broadcast packets to that port. • For NETGEAR 8800 switches, the following guidelines apply: • You can enable or disable egress flooding for unicast, multicast, or broadcast MAC addresses, as well as for all packets on one or more ports. • Disabling multicasting egress flooding does not affect those packets within an IGMP membership group at all; those packets are still forwarded out. • If IGMP snooping is disabled, multicast packets with static FDB entries are forwarded according to the FDB entry. Configuring Egress Flooding To enable or disable egress flooding on NETGEAR 8800 switches, use the following commands: enable flooding [all_cast | broadcast | multicast | unicast] ports [ | all] disable flooding [all_cast | broadcast | multicast | unicast] ports [ | all] Displaying Learning and Flooding Settings To display the status of MAC learning and egress flooding, use the following commands: show ports {mgmt | } information {detail} show vlan {detail {ipv4 | ipv6} | {ipv4 | ipv6} | virtual-router | stpd | security} The flags in the command display indicate the status. 282 | Chapter 10. FDB
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