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1. #Cisco mac address lookup model how to#
2. #Cisco mac address lookup model software#
3. #Cisco mac address lookup model series#

The EVC model does not have the concept of trunks, VLAN interfaces, or a Switch Virtual Interface (SVI).

#Cisco mac address lookup model series#

If EFPs belong to the same BD and have the same BD number, then the EFPs receive traffic even if they have different VLAN numbers.Ĭisco IOS XR on ASR 9000 Series routers uses the Ethernet Virtual Circuit (EVC) model. The BD has one-to-many mappings with EFPs: all of the EFPs in a node for a specific EVC are grouped with use of the BD. The BD enables you to decouple the VLAN from the broadcast domain. Bridge Domain (BD) - A BD is an Ethernet broadcast domain internal to the device.Because multiple EVCs can pass through one physical interface, the main purpose of an EFP configuration is to recognize the traffic that belongs to a specific EVC on that interface and to apply the forwarding behavior and features specific to that EVC. An EFP is defined as an end-point of an EVC within a node. EVC - EVC is an end-to-end representation of a single instance of L2.Ethernet Flow Point (EFP) - EFP is an L2 logical subinterface that is used in order to classify traffic under a physical or a bundle interface.The EVC model eliminates the Cisco IOS restriction of 4,096 VLANs maximum. With the EVC model, this concept is decoupled in order to allow more flexibility and higher scale. Traditionally, the VLAN tag defines the classification, the VLAN, the forwarding, and which Content Addressable Memory (CAM) table to use in order to perform a MAC address lookup. The EVC model allows Cisco IOS XR to leverage the current 802.1Q VLAN tags in a new way. The ASR 9000 Series router does not follow the IEEE model of Layer 2 (L2) configuration, most notably 802.1Q and 802.1AD.

If your network is live, make sure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration. The information in this document was created from the devices in a specific lab environment. ASR 9000 Series routers use the EVC model while Carrier Routing System (CRS) routers that run Cisco IOS XR do not.

#Cisco mac address lookup model software#

This document is not restricted to specific software but is restricted to 9000 Series Aggregated Service Router (ASR)-related hardware versions that use the Ethernet Virtual Circuit (EVC) model in order to configure L2VPN. There are no specific requirements for this document.

#Cisco mac address lookup model how to#

(ETA: What if you can't get to the Console port? How do you get the IP address of the switch in order to SSH or (if you must) Telnet in?)Ĭouldn't you just use CDP? #show cdp nei detail will show you the ip of the connected devices.This document describes how to convert a Cisco IOS ® Layer 2 switching configuration to a Cisco IOS XR Layer 2 Virtual Private Network (L2VPN) configuration. The amazing thing to me is, this far into the 21st Century, this is still the only way I could find to get this information - i.e.

Also, 'sh ip arp | i 0/24' will show just the MAC address(es) on that port.) If you're all Cisco, 'show cdp neighbor' (or 'sh cdp nei') will get you to the next switch. (Small tip: When you see a large number of MAC addresses showing up on a single port, there's a switch on that port into which those MAC addresses are connected. It helps to Ping the subnet's broadcast address (e.g. :^D After beating Google to death over it, hoping for some useful tool, I ended up using exactly the same process (plus the online MAC address lookup to ID the device manufacturer), so I can affirm this works perfectly, if you work it.Īs you can see, the 'sh arp' or 'sh ip arp' commands also give you the MAC addresses, so essentially the 'sh mac add' is only to get the port in which the device is connected. Thanks for posting this *after* I finished a "What's Connected Where" jihad on our network.