triadatea.blogg.se - Cisco mac address filtering

It is crucial for any corporate communication and any failure will be very costly. Local area networks segments are also part of the access layer.Ĭore layer is the high-speed switching backbone of any network. Access layer : The access layer consists of the remote office sites using ISDN, Frame Relay etc.Address summarization and media translation are applied in the distribution layer. Distribution layer : The Distribution Layer is responsible for routing traffic between VLANs, Broadcast domain definition, Inter-VLAN routing, and security.

Core layer: Designed for fast switching, high availability and redundancy.

The Access Layer is responsible for Layer 2 services, such as VLAN membership, traffic filtering based on broadcast or MAC addresses. The Distribution Layer is responsible for routing traffic between VLANs, Broadcast domain definition, Inter-VLAN routing, and security. Provide back-bone High speed switching in a campus network enviornment The primary function of a Core Layer is to switch traffic as fast as possible and providing connectivity between switch blocks, WAN blocks and/ or any other blocks that may be present. Control of traffic: Ability to detect undesirable application traffic flows at the network access layer and allow for selected control (drop or police) of undesirable traffic.įunction of the core layer and distribution Layer Handle switch bandwidth: You can move data from one network to another to perform load balancing.ĥ. Support for various devices: The campus access layer supports multiple device types including phones, APs, video cameras, and laptops, with each requiring specific services and policies.Ĥ. Create separate collision domains: A switch can be configured to use separate collision domain for each connected node to improve performance.ģ. Enable MAC address filtering: Here, the switch is configured to allow/deny access to network resources depending on the host machine's MAC address (also called the physical address).Ģ. Typically, the following are performed at the Access Layer (AL):ġ. These devices also provide LAN segmentation.

The devices functioning at Access Layer are usually characterized with higher port density and lower cost. Layer 2 switching is done based on physical (MAC) addresses, whereas Layer 3 switching is based on logical address. Layer 2 switching is based on hardware based bridging, whereas Layer 3 switching is based on hardware based routing. The address table lists the destination MAC address, the associated VLAN ID, and port number associated with the address and the type (static or dynamic). Static address: a manually entered unicast address that does not age and that is not lost when the switch resets. Show mac address-table vlan - Displays the MAC address table information for the specified VLAN.ĭynamic address: a source MAC address that the switch learns and then ages when it is not in use.

Show mac address-table static - Displays only static MAC address table entries. Show mac address-table learning - Displays MAC address learning status of all VLANs or the specified VLAN. Show mac address-table interface - Displays the MAC address table information for the specified interface. Show mac address-table dynamic - Displays only dynamic MAC address table entries. Show mac address-table count - Displays the number of addresses present in all VLANs or the specified VLAN. Show mac address-table aging-time - Displays the aging time in all VLANs or the specified VLAN.

Show mac address-table address - Displays MAC address table information for the specified MAC address. The address table includes these types of addresses:Ĭommands for Displaying the MAC Address Table All MAC addresses in the address table are associated with one or more ports. The MAC address table contains address information that the switch uses to forward traffic between ports. Layer2 Technologies 1.1 Configure and verify switch administration