Dell PowerConnect 2708 User Manual

Also see for 2724 - PowerConnect Switch: Appendix Datasheet Getting started guide

Contents

Dell PowerConnect 2708 User Manual Manual pdf 11 page image

11MAC Address Supported FeaturesMAC Address Capacity SupportThe PowerConnect 2708, 2716, and 2724 switches support a total of 8K MAC addresses, and thePowerConnect 2748 supports a total of 16K MAC addresses.Auto-Learning MAC AddressesThe switch enables MAC address auto-learning from incoming packets. The MAC addresses arestored in the Bridging Table.Automatic Aging for MAC AddressesMAC addresses from which no traffic is received for a given period of time are aged out. Thisprevents the Bridging Table from overflowing.Managed and Secure Modes VLAN-aware MAC-based SwitchingIn Managed or Secure mode, the switch system always performs VLAN-aware bridging. Classicbridging (IEEE802.1D) is not performed (where frames are forwarded based only on theirdestination MAC address). However, a similar functionality may be configured for untaggedframes. Addresses are associated with ports by learning them from the incoming frames sourceaddress.Unmanaged Mode Classic BridgingIn Unmanaged Mode, the switch performs classic bridging. Frames are forwarded based on theirdestination MAC address only, regardless of the VLAN tag.Layer 2 FeaturesPort MirroringThe port mirroring mechanism monitors and mirrors network traffic by forwarding copies ofincoming and outgoing packets from a monitored port to a monitoring port. Users can specifywhich target port receives copies of all traffic passing through one or more source ports.Storm ControlStorm Control enables limiting the amount of Multicast and Broadcast frames accepted andforwarded by the switch. When Layer 2 frames are forwarded, Broadcast and Multicast frames areflooded to all ports on the relevant VLAN. All nodes connected to these ports accept and attemptto process these frames, thus placing load on both the network links and the host operating system.