Layer 2 switch work on layer 2 of OSI model i.e. To route, the Layer 3 switch configuration uses interfaces called switched virtual interfaces (SVI), which are also called VLAN interfaces. We will use ACL 102 for VLAN 20 and ACL 103 for VLAN 30. Add rules to ACL 101 (for VLAN 10). There are three points we need to remember: By default, the routing capability is not turned on in a Layer 3 switch. Set the sensitivity in detecting rapid MAC mo vement, by using the following command to tell the switch how many times a MAC address can move ports in one second: set switch thrashlimit=5..255 Configuration on trunk groups A layer 3 etherchannel is similar to an interface on a router. Starting at '1' and using the same number on both sides keeps the configuration logical and easier to troubleshoot. . Work the same, just need a Cisco Layer 3 switch. Layer 3 switches can work at Layer 2 and Layer 3 and be deployed at the access layer or aggregation layer as user gateways. PC0 is sitting in Vlan 1. This is used with BGP. First to go System > Routing > Gateways and click "Add" and enter the IP address of the Layer 3 switch routed port. Switch(config)# vlan 3. Some of these services which make a layer 3 switch better than a layer 2 Switch are. Assign the physical switch ports to each VLAN. Configure Inter-VLAN Using Layer 3 Switches. << OUTPUT OMITTED >> ! Configure a loopback interface to be used as the router ID. The window that appears will allow the configuring of the first routed interface and a default route. Then, enable EIGRP so that it can exchange route information with other routers. In one common topology, known as a "router on a stick . This can be done by configuring a layer-3 switch, each with a main router in a wide area networking scenario so that the switch can manage all the local level VLAN routing. Switching algorithm is simple and is the same for most routed protocols. How to Configure Cisco Layer 3 Switch Juniper L3 Switch configuration examples Configure automatic backup whenever there is a "commit" executed. Step 12 Click the Idle-PC Finder button to select the optimal value for your computer's processor performance for Layer 3 Switch IOS. Switching at layer 3 . End with "CNTL/Z".] One for the uplink to the Firewall (which acts as the switch's default route), one for the data VLAN, and one for the voice VLAN. Click Add. Assign an interface to the VLAN by specifying the logical . Layer 3 Configuration This chapter covers the following Layer 3 sections: IPv4 IPv6 Ingress and Egress Per-Port for IPv4 and IPv6 Counters ACLs and Route Maps VARP OpenFlow DirectFlow Decap Groups Nexthop Groups Global Knob to Set MTU for all Layer 3 Interfaces Support for L3 MTU on 7280R3/7500R3/7800R3 Segment Security Switch (config-if)# ip address 172.16.1.1 255.255.255.252. Configuration Notes This example uses router configurations of AR3600 V200R007C00SPCc00. In the example below, 10.0.0.4 is the FTP server, the " transfer-on-commit " tells the switch to backup the config to FTP when "commit" happens. Acts as a switch to connect devices within the same subnet. Layer 3 switch is conceived as a technology to improve network routing performance on large LANs. Trunk configuration differs slightly on a Layer 3 switch. Opposite to layer 2 switch a layer 3 switch use the IP address along with MAC address for forwarding the data packets in the network. Switch(config)# interface range fa 0/1-3. Configure IP address 192.168..1/30 on Switch1 and 192.168..2/30 on Switch2. interface GigabitEthernet0/2 no switchport ip address 172.16.2.42 255.255.255.252 duplex auto I'm having trouble configuring routing between Layer 3 switch and the router. It requires to be as short as possible, so the . Switch (config)# interface fastethernet0/1 Switch (config-if)# No switchport Switch (config-if)# ip address 192.168.1.2 255.255.255. Switch(config-vlan)# name Users. Layer 3 switch supports all switching features, while also has some basic routing functions to route between the VLANs. The Layer 3 forwarding (routing) logic forwards IP packets between VLANs. Layer 3 switches typically support two configuration options to enable IPv4 routing inside the switch, specifically to enable IPv4 on switch interfaces. The switch won't "switch" traffic on this interface but route it. a. Before we configure the port channel settings you need to make sure that all interfaces have the exact same configuration. In the ACL ID/Name drop down menu, choose 101. Layer 3 switches were developed to provide the network with the following advantages: Better fault isolation and traffic segregation Simplify security management Reduce broadcast traffic volume Easier VLAN configuration process Support Inter-VLAN routing Separate routing tables Reduce effort and time in troubleshooting PC1-192.168.1.10/24, PC2-192.168.1.20/24, PC3 - 192.168.2.10/24, PC4-192.168.2.20/24. Each IP address on a Layer 3 switch must be in a different subnet. 1. Port densityLayer 3 switches are enhanced Layer 2 switches and, hence, have the same high port densities that Layer 2 switches have. the most distinguish feature of layer 3 switch is its routing capability Unfortunately, in the implementation, the routing function on the switch is often not used because routing task is done by dedicated router You can save more money by using products from other vendor which produces managed switches. network layer where it route packet by using IP address, it is used widely on VLANs. We will also configure the switch port connect to the router as native Layer 3 port. Thank you for reading More from this site Layer3-Switch (config-if)# no shut ! Enable routing on the switch with the ip routing command. Tab completion. Of course, keep in mind that not all UniFi switches support hardware support for L3 routing. Memory of MAC address table is the number of MAC addresses that a switch can keep, usually expressed as 8k or 128k. The 'no switchport' command enables native layer 3 functionality just like an Ethernet port on the router performs. End with CNTL/Z. Switch (config)# 2. Layer 3 switch can create and store the VLANs which breaks the big broadcast domain into small broadcast domains. 2. Step 11 In the Network Adapters window, select the NM-16ESW interface in Slot 0 and continue to the next step. Make the interface a static trunk port. Assigning an IP address to VLAN is easy, only read the "Assigning IP address to VLAN" section at the end of this articles. Using Layer 3 switches for inter-VLAN routing as opposed to traditional routers is popular (and recommended) for the following reasons: Performance versus Cost. Latency is the delay time that a data transfer suffers. . This configuration example shows a simple topology to illustrate how to connect a single Layer 2 access switch connected to multiple VLANs to a distribution switch, enabling traffic to pass between those VLANs. Step 13 For traffic passing between two VLANs, the switch routes the traffic using a Layer 3 routing interface on which you have configured the address of the IP subnet. Layer 3 switch are capable to do routing of data packets in a network. Hitting the tab key once you have enough unique text on the screen will auto-complete a command. A layer 3 switch is a device that forwards traffic (frames) based on layer 3 information (mainly through mac-address). Leave the RAM value of Layer 3 Switch as default and click Next. Provide a name for the network. To start using layer 3 routing, navigate to the switch details page by going to Switch > Monitor > Switches and clicking on the switch to be configured. Step 4 ip routing and the static routes - for which you need to know the remote network information. Inter-VLAN routing using a Layer 3 switch is simpler to configure than the router-on-a-stick method. Configure a route map and IP prefix list to redistribute all loopback addresses and leaf networks through BGP. Assign IP addresses per Table 3. For pfSense to know about the networks we need add static routes back to Layer 3 switch. One of the most critical functions of a Layer 2 Cisco Switch is to segment the network into different L2 VLANs, where each of these VLANs belongs to a separate L3 subnet. Short Bytes: Layer 3 switches offer a lot more functionalities than layer 2 switches. To decide the ip addresses yes you choose - so if ISP 1 uses 192.168.1.x and the router is .1 then you could assign the switch as .2. Configure these interfaces as a Layer 3 Etherchannel with LACP. Follow the steps below to create a new network: 1. Cisco Layer3 Switch Basic Configuration Example Table of Contents Summary Network Diagram Configuration Conditions Initial Configuration Configuration Summary On a Layer 3 switch, configure IP addresses on the SVI/routed ports to interconnect the network (VLAN). Create A Secure Network With Allied Telesis Managed Layer 3 Switches 7 Protecting the network 2. From a host, verify connectivity to a host in another VLAN using the ping command. spanning-tree mode pvst ! Configuration - Here is a topology in which we have a layer 3 switch connected to host devices namely PC1, PC2, PC3, PC4. Unifi switches - Layer3 configuration (routing) In this tutorial, we will show in a few steps how to configure a simple Layer3 routing, based on UniFi switches. Purpose of a layer 3 switch Because it's a layer 3 interface, we configure an IP address on it. Switch(config)# ip routing Switch(config)# interface fastethernet 2/1 Need to rerun a command? I have the following setup: SW1 - Layer 3 switch has 3 Vlans: Vlan 1 (off Fa0/2), Vlan 2 (off Fa0/3) and Vlan 3 (off Fa0/4). Layer 3 switch work on layer 3 of OSI model i.e. data link layer and sends a "Frames" to destination port using MAC address table which stores the mac address of a device associated with that port. Virtual routing interfaces (used by VLANs to route among one another) Loopback interfaces. Cisco Layer 3 Switch InterVLAN Routing Configuration The latest Cisco Catalyst Switches are equipped with the Enhanced Multilayer Image (EMI), which can work as a Layer 3 device with full routing capabilities, also known as a multi-layer switch (MLS). Open the UniFi Network application and navigate to the Settings > Networks section. interface GigabitEthernet0/1 no switchport ip address 172.16.2.18 255.255.255.252 duplex auto speed auto ! You can use your choice of number for the channel-group. Layer3-Switch (config-if)# ip address 10.20.20.20 255.255.255. After all, any network devices (routers, firewalls, computers, servers etc) have to be connected to a switch. Switch#Switch#conf t. Enter configuration commands, one per line. By following the above type of scenario the router working efficiency will improve and it can be used dedicatedly for long distance (WAN) connectivity and data transmission. step 3 - yes configure the switch ip vlan interfaces to match the ISP links. The idea of creating Layer-3 switch is basically to efficiently do inter-VLAN routing or to do internal routing between multiple broadcast domains (multiple LAN where each LAN has its own subnet) while keeping Layer-2 features such as spanning tree and trunking. Generally, 1K = 1024 VLANs is enough for a Layer 2 switch, and the typical number of VLANs for Layer 3 switch is 4k = 4096. InterVLAN routing on the switch works perfectly, but I cannot ping the subnet outside the switch. Here is the output of some commands: AURLHRSWDN01#sh run hostname AURLHRSWDN01 ip routing ! Giving IP addresses to All hosts. Select the appropriate UniFi Switch in the Router field. The switch bridges traffic within a VLAN. Cisco Switch Layer2 Layer3 Design and Configuration Written By Harris Andrea Layer2 and Layer3 switches are the foundation of any network. After the configuration is complete, the configuration can be verified by testing connectivity between the hosts. You can configure Layer 3 subinterfaces to route traffic between the VLANs. Switch (config)#ip routing. This article covers basic and advanced configuration of Cisco Catalyst Layer 3 switches such as the Cisco Catalyst 3560G, 3560E, 3560-X, 3750, 3750E, 3750-X, 3850 and 4500 series, and extends to include the configuration of additional features considered important to the secure and correct operation of these devices. 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