For multiple context mode, complete this procedure in the system execution space. Cisco ios xr software supports vlan subinterface configuration on gigabit ethernet, 10gigabit ethernet, and fast ethernet interfaces. How to configure vlan subinterfaces on cisco asa 5500 firewall. I think you can actually use subinterfaces on the cat6500. The configuration of the router subinterfaces is similar to the configuration of physical interfaces, except that it is necessary to create the subinterface and assign a vlan. My goal is to create many subinterfaces on one physical interface connected to the internet subnet vlan. Mar 29, 2020 a step by step guide to configure inter vlan routing on the cisco router or layer 3 switches. To identify the hardware platform or software image information associated with a feature, use the feature navigator on. The syntax for the subinterface is always the physical interface, in this case f0 0, followed by a dot and a number of subinterface. A software interface may refer to a wide range of different types of interface at different levels. There is a big conceptual difference between programming a layer 2 device to pass frames that have different vlan tags and creating a virtual interface and associating it with a vlan on a layer 3 device. The switch model is wsc375048pse with ios version c3750ipservicesmz.
Cisco ios xr interface and hardware component configuration. Cisco ios xr software supports vlan subinterface configuration on gigabit ethernet, 10gigabit ethernet, and fast. The exchange can be between software, computer hardware, peripheral devices, humans, and combinations of these. Some computer hardware devices, such as a touchscreen, can both send and receive data through the interface, while. I am able to get routers 1 and 4 to ping, but no layer 3 connectivity between r6 and r1r4 in this configuration. My goal is to create many subinterfaces on one physical interface connected to the internet subnetvlan. Each subinterface will be configured for a vlan, security zone and security level. As an example, figure 312 shows a network diagram of a trunk link between an asa and a switch.
Dec 14, 2012 cisco ios software, 2800 software c2800nmspservicesk9m, version 12. Cisco 1710 software configuration manual pdf download. Associating a subinterface with a vlan implements inter vlan communication and applies to dot1q termination and qinq termination scenarios. After making the basic settings, create 3 different vlan groups according to the topology you have created on the switch. Spanning tree protocol stp is enabled by default for only nnis on all vlans. Vlan subinterfaces on cisco asa 5500 firewall configuration. Sep 21, 2011 the configuration of the router subinterfaces is similar to the configuration of physical interfaces, except that it is necessary to create the subinterface and assign a vlan. When a pc on vlan 10 needs to communicate to a pc on vlan 20 it will use the vlan interface as the default gateway and the switch will route the packet via layer3 and the. Youd probably have to use policy based routing to do the same on secondary interfaces and i think there is a processor impact on most platforms. Configuringlayer3subinterfaces thismoduledescribeshowtoconfigurethedot1qvlansubinterfacesonalayer3interface,whichforwards. How to configure intervlan routing sysnettech solutions. However, i should note that the above prompt is only visible when entering vlan interface 2 and above. After a vlan has been created, ports are assigned to the vlan.
Configure the ip address command on a subinterface and use the encapsulation dot1q vlan id native subcommand to tell the router both the vlan id and the fact that it is the native vlan. In computing, an interface is a shared boundary across which two or more separate components of a computer system exchange information. This tag is us ed for vlan and quality of service qos priority identification. The default en vlan 10 must communicate with eachother. Using the command line interface section of upgrading software in catalyst. Ciscos per vlan spanning tree implementations allow cisco devices to work just fine without vlan 1 but devices without a per vlan spanning tree solution use vlan 1 for bpdus. How to configure vlan subinterfaces on cisco asa 5500 firewall one of the advantages of the cisco asa firewall is that you can configure multiple virtual interfaces subinterfaces on the same physical interface, thus extending the number. One of the advantages of the cisco asa firewall is that you can configure multiple virtual interfaces subinterfaces on the same physical interface, thus extending the number of security zones firewall legs on your network. All the old routers is connected to the same internet facing subnet vlan and each of the old router have an unique ip in that internet facing subnet vlan. Data frames from those devices are still picked up and those devices may not be administered with a vlan id default vlan 1 or, given an alternative vlan id such as vlan 99. Cisco 1751 router software configuration guide ol107001 example the following is sample output from the debug vlan packet output. Once you create the svi vlan interface, you can create an access port on one of the switchports, and the vlan will be created, or if using a trunked switchport, you have to manually add the vlan. But you need to configure sub interfaces with default gateway to route the traffic. How to configure vlan subinterfaces on cisco asa 5500 firewall one of the advantages of the cisco asa firewall is that you can configure multiple virtual interfaces subinterfaces on the same physical interface, thus extending the number of security zones firewall legs on your network.
Catalyst 2960x, catalyst 3560 trunk port configuration example to carry the different vlan tags between two devices on the same physical link. Just want to point out that if you are not running an all cisco environment, disabling vlan 1 on a trunk will likely cause spanning tree issues. Creates a virtual subinterface and moves to subinterface configuration mode. Create a vlan subinterface by adding a subinterface number to the interface identification command. Vlan subinterface commandsonthe cisco ios xr software. Configure intervlan routing on cisco router using packet.
Configuring a management vlan interface free ccna workbook. Example 172 shows both native vlan configuration options with a small change to the same configuration in example 171. Cisco asa vlans and subinterfaces each interface on a cisco asa firewall is a security zone so normally this means that the number of security zones is limited to the number of physical interfaces that we have. What is a subinterface in a cisco router and how to create. Configuring vlan subinterfaces technical documentation. Subinterfaces with softwaredefined access sdaccess and multiprotocol. Cisco connected grid ethernet switch module interface card.
Vlan information is not saved in the runningconfig or startupconfig but in a separate file called vlan. A dot1q vlan subinterface is a virtual cisco ios interface that is associated with a vlan id on a routed physical interface. A subinterface in a cisco router uses the parent physical interface for sending and receiving data. This subinterface will accept frames on vlan 99, or, untagged frames fletch jun 8 16 at 17. I have a cisco 2811 router connected to a 3560 catalyst switch which has 5 vlans of which i need to protect ip traffic of 4 from 1. Figure 4 illustrates the configuration steps for two vlan subinterfaces. Vlan configuration guide, cisco ios xe gibraltar 16. So if you want your vlans hosts can communicate with each other, you must configure. Attached is a link to part of the ios config doc for 6500 switches 12. Extendedrange vlans are not saved in the vlan database. Page 7 defining the vlan encapsulation format assigning an ip address to a network interface configuring ipx routing over ieee 802. We happen to have the same switches for our cisco lab and they too run the 12. Jan 15, 2020 after creating the subinterface on the cisco router, check the status of the subinterface by executing the show ip interface brief command at the cli prompt. Configuration options for vlan ids 1006 through 4094 extendedrange vlans are limited to mtu, rspan vlan, private vlan, and unieni vlan.
The working unit of the layer 2 devices is the port. This tag is us ed for vlan and quality of service qos priority. Subinterfaces with softwaredefined access sdaccess is not supported. Secondary lan ip vs subinterface if you use subinterfaces, then you can apply an acl on each one to filter intervlan traffic. Subinterfaces can be created on layer 3 physical interfaces and layer 3 port channels. A subinterface is a virtual interface created by dividing one physical interface into multiple logical interfaces. Cisco asa series general operations cli configuration guide, 9. I configured an ip address on h1 and h2 so they are in the same subnet. This module provides command line interface cli commands for configuring 802.
Use cisco feature navigator to find information about platform support and cisco software image support. But the nature of cisco 891 is that its both a router and a switch with 10 ports. Both have a vlan interface assigned to each with an ip address such as 192. Applications or programs running on the operating system may need to interact via data streams, filters, and pipelines. For example, in layer 2 domain, traffic sent by pc in vlan 10 can only be received by pcs in the same vlan. This example shows how to enable ip routing on the router, create two subinterfaces, and specify the encapsulation, vlan number, and ip address for each subinterface. It means only hosts that are members of the same vlan can communicate with each other. Vlan subinterfaces let you divide a physical, redundant, or etherchannel interface into multiple logical interfaces that are tagged with different vlan ids. Hello, i am trying to configure a subinterface such as g101. Basically, on a vlan, no host can communicate with hosts within other vlans. There are limits on the number of vlans supported on each. Problem with vlan subinterface configuration hello, i am in interface mode, i have configured vlan subinterfaces under the internal2 link of my fortigate 200a.
Understanding vlans and routed vlan interface in cisco switch. Entering vlan 1 interface gives us the expected configif prompt. Vlans are broadcast domains defined within switches to allow control of broadcast, multicast, unicast, and unknown unicast within a layer 2 device vlans are defined on a switch in an internal database known as the vlan trunking protocol vtp database. Nov 26, 2006 here is what we need to do on the router. Secondary lan ip vs subinterface if you use subinterfaces, then you can apply an acl on each one to filter inter vlan traffic. Bridge groups on vlan interfaces are supported on the route processor rp software. X, ip base, ip services, lan base, lan light platform. How to config vlan and subinterface lakshitha ganepola.
Basically this is the same thing as the router on a stick configuration on cisco ios routers but on the asa we also have security zones. Will switch ports both access and trunk ports be properly forwarding broadcast packetsdhcp requests for vlan or vlans or would only trunk ports propagate. This module describes how to configure the dot1q vlan subinterfaces on a layer. Vlan subinterfaces on cisco asa 5500 firewall configuration posted on may 25, 2012 by routerswitch tech 0 comments one of the advantages of the cisco asa firewall is that you can configure multiple virtual interfaces subinterfaces on the same physical interface, thus extending the number of security zones firewall legs on your network. In this lab i have 3 3750 cisco routers connected by an ethernet switch all on vlan 146. A step by step guide to configure intervlan routing on the cisco router or layer 3 switches. Problem with vlan subinterface configuration fortinet. A cisco asa can have subinterfaces defined on an interface, vlan tags through that physical interface which are considered by the software as a separate logical interface. You can configure the same vlan id on a layer 2 vlan or layer 3 vlan interface and on a layer 3 subinterface. Basically you cannot use a vlan with the 11005 range on a subinterface if the switch is in vtp client or server mode. To display vlan subinterfaces, use the show vlans command in privileged exec mode.
Jan 15, 2020 after configuring the cisco routers interface and the tcpip settings of the computers, click switch and click the cli tab in the window that opens. We are using the cisco 2600 router to do the intervlan routing between. Step 4 click pc0 in the workspace and open command prompt from the popup window. This page includes information on the maximum number of subinterfaces that can be defined. I have a soho environment for which im using cisco 891k9 as the isp gw. Cisco ios xr software supports vlan subinterface configuration on gigabit ethernet and10gigabit ethernet interfaces. Do not configure more than 4,000 layer 3 interfaces, that includes. Understanding vlans and routed vlan interface in cisco.
Mar 31, 2020 use bridge groups on vlan interfaces also called fallback bridging to bridge nonrouted protocols. Basically you cannot use a vlan with the 11005 range on a subinterface if the switch is in vtp clien. Each subinterface must belong to a different layer2 vlan, with a separate layer3 subnet. A vlan interface in a router is used with the switch modules, or hwic. Aug 03, 2014 cisco ios xr software supports vlan subinterface configuration on gigabit ethernet, 10gigabit ethernet, and fast ethernet interfaces. Configuring svlan subinterfaces technical documentation. After creating the subinterface on the cisco router, check the status of the subinterface by executing the show ip interface brief command at the cli prompt. Isr routers, asr routers subinterfaces divide the parent interface into two or more virtual interfaces on which you can assign unique layer 3 parameters such as ip addresses and dynamic routing protocols parameters. Apr 03, 2020 a dot1q vlan subinterface is a virtual cisco ios interface that is associated with a vlan id on a routed physical interface. Because there is one trunk between swich and router so we need sub interfaces for multiple vlans. The subinterface number does not have to match the vlan number, although it can for convenience and readability. Cisco router subinterface to main interface vlan configuration.
An interface with one or more vlan subinterfaces is automatically configured as an 802. Vlans are broadcast domains defined within switches to allow control of broadcast, multicast, unicast, and unknown unicast within a layer 2 device. Currently all vlan s and routing are working perfectly. All the old routers is connected to the same internet facing subnetvlan and each of the old router have an unique ip in that internet facing subnetvlan.
Associating a subinterface with a vlan implements intervlan communication and applies to dot1q termination and qinq termination scenarios. Cisco ios xr software supports vlan subinterface configuration on 10gigabit ethernet, and fast ethernet interfaces. The problem is that we are unable to ping the ip address of these interfaces from a pc on the network. The following example shows how to configure the native vlan of a tengige0204 trunk interface as 1. After configuring the cisco routers interface and the tcpip settings of the computers, click switch and click the cli tab in the window that opens. Configure intervlan routing on cisco router using packet tracer. Subinterfaces can be created only on layer 3 physical interfaces. This switch worked fine with my cisco router 2900 series where i had the same settings setup. How to configure vlan on cisco switch sysnettech solutions.
If you want to delete the vlan information you should delete this file by typing delete flash. Subinterfaces are logical interfaces created on a hardware interface. Interface and hardware component configuration guide for cisco. Cisco ios software, 2800 software c2800nmspservicesk9m, version 12. Vlans are defined on a switch in an internal database known as the vlan trunking protocol vtp database.
863 955 1543 222 1542 598 800 1455 502 1313 1195 451 351 957 942 1144 221 219 426 540 1493 426 413 659 1464 85 1419 875 388 270 564 147 1327 1211 37 879 1147