Cisco mac address-table learning-mode conversational

Cisco mac address table learning mode conversational license#
Cisco mac address table learning mode conversational series#

FabricPath hierarchical MAC address carries the reserved ethertype 0x8903.FabricPath ODA, OSA are in standard MAC address format.Outer Destination Address is the switch ID of the device where the frame egresses the fabricPath network вЂ“ FabricPath device strips the header.The Outer Source Address is the switch ID of the device where the frame ingresses the FabricPath network вЂ“ encapsulates with FabricPath header.The switch ID is automatically assigned or may be manually configured.The switch ID that the system assigns to each FabricPath device as it enters the fabricPath network is used as outer MAC destination address (ODA) and outer Mac source address (OSA) in the fabricpath header.Using FabricPath and conversational way of MAC address learning, the device has to learn far fewer MAC addresses as compared to CE, hence smaller and more manageable MAC tables.FabricPath is very useful in high performance, low latency computing.FabricPath also allows LAN extension across datacenters at L2, which is useful in disaster recovery operations, as well as clustering applications such as databases.

It facilitates the MAC mobility and server virtualization, which means that you can physically move the L2 node but retain the same MAC address and VLAN association for the virtual machine.FabricPath can be used across the datacenters, some of which has only L2 connectivity, with no need for е…ѓ configuration and IP configurations.In FabricPath network, no need to run STP.FabricPath still delivers the packet on a best efforts basis (just like CE) but FabricPath can use multiple paths for the traffic, very unlike STP which has blocked ports in case of phy loop.It allows multipath networking at L2 level.

Cisco mac address table learning mode conversational license#

This license must be installed on all devices before configuring the FabricPath.

FabricPath requires an enhanced L2 License.

FabricPath retains the configurations across ISSU.

CE VLANs use the traditional MAC address learning by default but they can be configured to use the conversational way of MAC learning.

All FabricPath VLANs use the conversational MAC address learning.

This selective learning (conversational MAC address learning) allows you to scale the network beyond the limits of individual switch MAC address table.

Conversational MAC addresses learning consists of 3 way handshake.

Each interface learns only those MAC addresses which are actively speaking with the interfaces.

Meaning вЂ“ Each interface learns only those MAC addresses for interested hosts, rather than all MAC addresses in the domain.

Finally, using ECMP and the trees, the system automatically load-balances the traffic throughout the FabricPath network.

Known unicast traffic uses the equal cost multipath protocols (ECMP) to forward traffic throughout the network.

The frames carry the same FTag that is assigned at ingress throughout the fabricpath network and L2 IS-IS allows all devices to have the same view of all the trees built by the system.

L2 IS-Is does not require any configuration and becomes operational as soon as FabricPath is enabled.

L2 ISIS and е…ѓ ISIS are different and work independently.

FabricPath uses the L2 IS-IS protocol to forward traffic in the network using the fabricpath headers.

When the frame leaves the fabricPath network, to go to the CE network, the egressing interface decapsulates the frame and leaves the regular CE header.

The system builds paths, called trees, through FabricPath network and assigns a forwarding tag (FTag) by flow to all the traffic in the FabricPath network.

When a frame enters a FabricPath network from a Classical Ethernet network, the ingressing interfaces encapsulate the frame with FabricPath header.

The system uniquely assigns a unique switch ID to each device that is enabled with FabricPath.

Enhances mobility and virtualization in FabricPath network.

Provides a single control plane for unknown unicast, unicast, broadcast and multicast.

Provides built-in loop prevention and mitigation with no need to use STP.

Allows L2 multipathing in the fabricPath network.

Cisco mac address table learning mode conversational series#

You must have an F Series Module in Cisco Nexus7k to run FabricPath.

Cisco mac address-table learning-mode conversational