A dot1q vlan subinterface is a virtual cisco ios interface that is associated with a vlan id on a routed physical interface. I do remember my confusion about trunk configuration on cisco routers during my initial days of ccie lab preparation. Find answers to subinterface encapsulation on cisco 2651 router from the expert community at experts exchange. Subinterfaces are multiple logical interfaces configured on a main physical interface to allow to. If you want to completely remove the subinterface from your configuration you can simply go to global config mode and give a command no interface eg. Subinterfaces can be created on layer 3 physical interfaces and layer 3 port channels. All ftd configuration refers to the logical etherchannel interface instead of the member physical interfaces. The following example configures interface parameters in multiple context mode for the system configuration, and allocates the gigabitethernet 01. When i configure the public ip address directly on the physical interface i have inernet access as expected but when i configure it on a subinterface i do not. Cisco content hub configuring netflow and netflow data export. Using frame relay pointtopoint subinterfaces cisco press. Subinterface configuration 81933 the cisco learning network. Netflow configuration guide, cisco ios xe release 3s.
Subinterfaces with softwaredefined access sdaccess and multiprotocol label switching mpls are not supported. If you just want to shut your intervlan routing from that subinterface you can go. When setting up an etherchannel connection, remember the following points. To verify the configuration of a subinterface and its status on the vlan. The switch model is wsc375048pse with ios version c3750ipservicesmz. Cisco asa series general operations cli configuration guide, 9. How to create subinterface on a 3560 cisco community. 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. The number of subinterfaces allowed depends on your platform.
You dont need to create subinterfaces on a l3 switch. Find answers to creating subinterfaces on cisco asa 5505. Asa subinterface configuration issues cisco community. Instead make the port a trunk port and then create a l3 svi for each vlan you want to route eg. Network topology in the following example, we are using subinterfaces on the cisco 1900 integrated service router isr that have each been assigned a unique 802.
The rest configuration like nameif, security leevel and ip. To configure a large number of subinterfaces, we recommend entering all configuration data before you commit the interface command. Subinterface configuration 81933 the cisco learning. Some computer hardware devices, such as a touchscreen, can both send and receive data through the interface, while others such as a mouse or. Are there any advantages or disadvantages on each configuration.
Cisco 3900 series, 2900 series, and 1900 series software. The shutdown interfacespecific configuration command deactivates an interface. I have been trying to configure a cisco 2600 with subinterfaces to connect to switch. To configure ipv6 functionality for an interface or subinterface template, follow these steps. I am trying to set up a subinterface on my cisco asa 5515. And now my question is why creating a subinterface if you can use the physical interface directly.
Use cisco feature navigator to find information about platform support and cisco software image support. I hereby agree to receive information about the trainings offer from grandmetric sp. The exchange can be between software, computer hardware, peripheral devices, humans, and combinations of these. Using frame relay pointtopoint subinterfaces cisco. Policy based routing on subinterface of cisco 2621 solutions. Chapter description jonathan chin dicussess basic frame relay operations on cisco routers in a routerbased frame relay network.
A previous system i was working on already had this networking setup using 12 sub interfaces binding on ports 10,00060,000 for each interface, i no longer have access to this particular server and i just need to recreate the networking configuration. X, ip base, ip services, lan base, lan light platform. I am aware of all the background information to native vlans, just to repeat here that they are used for control traffic, that is cdp vtp pagp dtp on a router, subinterfaces can be defined to allow different vlan ids over a trunk from a connected switch to communicate, each vlan id will be on different subnet, the subinterfaces act as default gateways and have nothing to do with. How to configure subinterfaces on layer 3 interfaces.
Use the no shutdown command to activate an interface. Selects an interface and enters subinterface configuration mode. It eliminates many configuration issues such as the need for mapping the dlci to an ip address, broadcasting, etc. Select feature add template and then select an appropriate device model. Im trying to remove a vlan and sub interface to start over on my dhcp testing that i have a thread on, but i cant get the existing vlan and subinterface to delete from the router. How to configure vlan subinterfaces on cisco asa 5500 firewall. If anyone can provide me with any insight on this concept it would be greatly appreciated. A subinterface in a cisco router uses the parent physical interface for sending and receiving data. I create 2 routers interconnected by an ether link. Asa subinterface configuration issues i am trying to change my configuration to serve my networks public ip and dmz from subinterfaces on the same physical interface. From interface configuration mode, you can enter subinterface configuration mode. It is my understanding that i could connect one cable from the isp to the fast.
Vlan configuration guide, cisco ios xe gibraltar 16. An example is used to illustrate how multiple subinterfaces can be created under the same. Both configuration commands are performed on the hub router r3 in figure 42. Computer switch port 47 trunk with pvid 18, allow 17 several switches connected via 10g set to trunk switch port 2 trunk with pvid 18, allow 17 asa interface that has a sub interface of 04. Find answers to why a subinterface on cisco router from the expert community at experts exchange. Most asa models use routed ports for subinterface creation. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with cisco products and technologies. Best it help desk software for tech support in 2018. Svi interface config cisco svi interface config huawei. The netflow subinterface support feature provides the ability to enable netflow on a persubinterface basis. Jonathan chin dicussess basic frame relay operations on cisco routers in a routerbased frame relay network.
Cisco router subinterface to main interface vlan configuration. Selects an interface or interface range and enters subinterface configuration mode. By default, the cisco ios software allocates all unassigned dlcis advertised by the frame relay switch to the physical interface on the router. Subinterface encapsulation on cisco 2651 router solutions. 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. Cisco ios xr software supports vlan subinterface configuration on gigabit ethernet, 10gigabit ethernet, and fast ethernet interfaces. Commanddefault nodefaultbehaviororvalues commandmodes subinterfaceconfiguration commandhistory release modification release thiscommandwasintroduced. Basic software configuration using the cisco ios command. Im trying to route between 2 vlans using a c1760 with a wic4esw installed. Subinterface id enter the subinterface id as an integer between 1 and 4294967295. Pppoe client on subinterface i had a config working great on my 2811, so i thought it should work on a 2821. 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.
What is a subinterface in a cisco router and how to create. In this lab i have 3 3750 cisco routers connected by an ethernet switch all on vlan 146. Cisco 800 series integrated services routers software configuration guide. So where you would create a subinterface with an ip addressc create a l3 svi as above. Below is a snapshot of a configuration example of vlan subinterfaces. We are using the cisco 2600 router to do the intervlan routing between. Configuring frame relay subinterfaces cisco frame relay. What i need is to create a tunnel via internet, but the vendor will finish the internet link in ethernet, so as i have no free ports i was thinking about creating a new vlan in the switch for the vendor and a new subinterface in the router for that vlan. I am going to replace my home router with a cisco 1841.
Cisco 7600 series router sip, ssc, and spa software. I am trying to change my configuration to serve my networks public ip and dmz from subinterfaces on the same physical interface. Note the following configuration order before you configure evc. By default, a subinterface is active when you create it using the interface command. The ip address interfacespecific configuration command is used to assign an ip address to a subinterface. Mar 30, 2016 configuration examples for evcs on the cisco isr g2 router. In cisco vmanage nms, select the configuration templates screen. Perform these tasks in the order in which they appear. We show all required commands for multiple ssids and 802. On physical port the subinterface number must be defined.
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. Ipsec tunnels on subinterfaces 3497 the cisco learning. Enabling appletalk routing defining the vlan encapsulation format. Catalyst 2960x, catalyst 3560 example of trunk port configuration to carry the different vlan tags between two devices on. Configure ipv6 functionality for an interface or subinterface template. I have a router where i configure 5xdhcp pools, with 192. Do not be afraid to enable it on a pair of ports and try it. In subinterface configuration mode you can configure multiple virtual interfaces called subinterfaces on a single physical interface. A subinterface is a virtual interface created by dividing one physical interface into multiple logical interfaces.
Cisco 1751 router software configuration guide ol107001 to route appletalk over ieee 802. Physical interface vs multipoint subinterface in cisco frame. Vlan tagging, cisco asa subinterface problems hewlett. Hello, i am trying to configure a subinterface such as g101. To create subinterface on routed port, use vlan tag for which the traffic will be landed and sourced to and from subinterface. I am able to get routers 1 and 4 to ping, but no layer 3 connectivity between r6 and r1r4 in this configuration. The cisco support and documentation website provides online resources to download documentation, software, and tools. Layer 3 subinterface huawei snmp configuration example. But the nature of cisco 891 is that its both a router and a switch with 10 ports.
This section describes the commands you use to create and configure subinterfaces on the rpm atm switch interface. It doesnt show in this forum but the is under the f of fastether. A subinterface in a cisco router utilizes the guardian physical interface for. When i try to create a subinterface i get the following error. Can i configure ethernet subinterfaces on a 1921 or 2600. Cisco content hub configuring netflow and netflow data.
If a layer 3 port has a subinterface configured with dot1q as the native vlan, cisco recommends not to configure routing related configuration on the layer 3 port as it will hinder the functionality of the native vlan subinterface. But before i do that, i want to configure it so it will work out of the box. A terminal emulation program like putty is necessary if you are connecting directly to your cisco device via a cable or remotely connecting via telnet or ssh. As you said, we have setup a trunking port between the switch and router, then configure the configure the interface and sub interfaces in your router.
Basic software configuration using the cisco ios commandline interface ol559301 how to perform a basic software configuration using the cisco ios cli configuring the router hostname the hostname is used in cli prompts and default configuration filenames. I installed two cisco isr4331routers in my soho model and they are both set up with a glcge100fx fiber interface add on module for. Example 421 shows an example of the configuration steps required to create a multipoint subinterface. This is the way the frame relay code works in cisco ios software. If you choose to download putty, you have many programs to choose from on. He also explains how to configure a basic frame relay network involving cisco equipment and how to perform basic monitoring and troubleshooting using relevant cisco ios show and debug commands. It permits easy expansion should you need to add another pvc later. In computing, an interface is a shared boundary across which two or more separate components of a computer system exchange information. May 17, 2002 commands for configuring subinterfaces.
Cisco asa most asa models use routed ports for subinterface creation. Subinterface configuration mode is a submode of interface configuration mode. May 23, 2014 in this lab i have 3 3750 cisco routers connected by an ethernet switch all on vlan 146. In the following example, a subinterface is configured for serial line 2, which is configured for frame relay encapsulation. How to remove vlan and sub interfaces on cisco 2901 router. Both configuration are working fine, tested on cisco packet tracer and gns3. So this way, a new subinterface would be configured with the public ip address. Gns3 the software that empowers network professionals. 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.
Lets take a look at a configuration example for this. It is a kind of basic configuration example if we compare with ccie studies but all the times our mind doesnt really click on right time and if it happens during exam than we should really cross our fingers. Find answers to policy based routing on subinterface of cisco 2621 from the expert community at experts exchange. Commands for configuring subinterfaces cisco press. When a wan interface is configured with both an efp and a subinterface, and the dot1q encapsulation with the same vlan id is used, the traffic on the subinterface gets a higher priority than the traffic on an efp. Router on a stick is a network configuration used to allow the routing of traffic between different vlans. From the configuration below i notice the tech has configured a subinterface and assign the serial ip. Putty is actively supported, in wide use and available for free from putty download. Catalyst 2960x, catalyst 3560 example of trunk port configuration to carry the different vlan tags between two devices on the same physical link. 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. Cisco 800 series integrated services routers software. Etherchannel has been a part of the cisco ios for many years, so you should find that all your switches support it with proper configuration. What is a subinterface in a cisco router and how to create a.
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