Category: How to configure layer 3 vlan interface on juniper ex switch

I'd like to have a Layer 3 interface in each switch that resides in VLAN so we can remotely manage the swtiches. Create a managment routing instance type virtual router place the RVI in this routing instance. All routing to this management RVI now is isolated from all other routing on the device. I don't have access to a switch at the moment, so creating the actual syntax is a bit hard.

Accept for the IP address duh you can configure this on all three switches. Should work I think. Ok, so I've placed all of the set cmds, and verified the configuration, but I still don't have pings between the switches.

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Showing results for. Search instead for. Did you mean:. Layer3 Vlan Interface? I've extended VLAN to all three switches and verified it is passing traffic. Could anyone please provide an example of such configuration. Thanks in Advance!This may not always be the case but most engineers try to keep VLAN numbers, names and subnets related for simplicities sake. You can also specify the tag number instead of the name if you like. All interfaces on a Juniper EX Series switch are configured as access ports by default.

There are two types of ports on a Juniper switch, Access and Trunk. You will learn how to configure interface trunking in a later lab. In order to configure the switch to perform L3 switching, you must first create the L3 VLAN Interface using the set interfaces vlan unit 10 family inet address Also another command that you should be familiar with is show interfaces vlan terse which will display administrative and operational status of the L3 VLAN interfaces.

Logical Lab Topology None Provided. You need to establish a console session to SW1 and log into the device using the root account or a user account with super-user privileges. It is recommended that you attempt to complete these lab objectives the first time without looking at the Lab Instruction section.

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If you are a student preparing for the Juniper JNCIA Certification Exam than you are more likely to remember how to complete these objectives if you attempt to complete them the first time on your own with the use of the core knowledge section found in this lab. You should only resort to the Lab Instruction section to verify your work.I know this is an oft asked question, I did already try searching The Google as well as this forum, to no avail, so now I'm posting a new probably duplicate thread!

I'm new to Juniper, and I'm trying to figure out how to set the bridge's IP address for in-band management. It was working after initial setup, but then after a reboot it was complaining about not being able to commit due to the same IP address configured to multiple devices so I deleted the offending line, now I'm not able to reach the switch's web interface, telnet, ping, etc. I'm not using the physical out-of-band management interface, so if I understand correctly I shouldn't be doing anything with "me0"?

I tried "set interfaces vlan unit 0 family inet address Does it need a reboot after setting an IP address? Go to Solution. If you think I earned it! If this solution worked for you please flag my post as an "Accepted Solution" so others can benefit. Basically the vlan. Based on this it looks like the ex uses ELS. I ended up explicitly adding the 'default' VLAN to the vlans section, set it's vlan id to 1 apparently you can't set l3-interface irb.

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How to Configure Multiple VLANs on Junos Switches

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Search instead for. Did you mean:. Configure Management IP Address. This is the only switch on the network, EX Solved! Message 1 of 4 7, Views.

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All forum topics Previous Topic Next Topic. No reboot is needed. Please refer to the below KB for configuration.

how to configure layer 3 vlan interface on juniper ex switch

Message 2 of 4 7, Views. Accepted by topic author it-sfwa. There are two parts to the configuration both need to be done to activate the interface. Message 3 of 4 7, Views. Thank you both for your helpful input.

how to configure layer 3 vlan interface on juniper ex switch

Message 4 of 4 7, Views. Day One Million!For example, some switch models that support layer 3 routing are the, etc. That is, you can assign an IP address directly on the routed port. The above feature means that you can implement Layer 3 functionality in your network without using a regular router. A similar scenario using the new Cisco Nexus switches is described in the article here. Of course you can expand this scenario with more Vlans and more Layer 2 switches as needed.

Configure VLANs in Juniper Switch

These two IP addresses will serve as the default gateway addresses for hosts belonging to Vlan10 and Vlan20 on the Layer2 switches respectively. That is, hosts connected to Vlan10 on the closet L2 switches will have as default gateway the IP address Similarly, hosts connected to Vlan20 on the closet switches will have address Also, all interfaces connecting the three switches must be configured as Trunk Ports in order to allow Vlan10 and Vlan20 tagged frames to pass between switches.

Enable Layer 3 routing Layer3-Switch config ip routing. Layer3-Switch config interface vlan20 Layer3-Switch config-if ip address Specifically, it allows host Moreover, access to anything else i. ASA config route outside 0. The above ASA sample configuration shows the necessary static routing required on the ASA to route packets back to vlan10 The answer is NO.

If there is no routing device in the network Layer 3 switch or Router then hosts connected to two different VLANs on the same Layer 2 switch will not be able to communicate. The only way to provide inter vlan routing on a Layer 2 switch is to have a Layer 3 switch or Router in the network which will receive the packets for each Layer2 VLAN and then route them to the other VLAN accordingly.

This is usually useful for providing internal LAN segmentation and traffic control. Note that vlan10 is still considered as inside zone higher security level for the ASA. The ASA also must have a static route pointing to internal vlan10 route inside The Layer3 switch needs only to have a default route pointing to the ASA This document provides the configuration and troubleshooting steps applicable to the creation of Layer 3 interfaces.

This is known as inter-VLAN routing. On Catalyst switches it is accomplished by the creation of Layer 3 interfaces switch virtual interfaces SVIs. Note : This document uses a Catalyst as an example.

Before you attempt this configuration on a series switch, ensure that you meet these prerequisites:. See this table in order to determine whether your switch can support interVLAN routing. This document assumes that Layer 2 has been configured and that the devices within the same VLAN connected to the communicate with one another.

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared default configuration. If your network is live, make sure that you understand the potential impact of any command. In this section, you are presented with the information to configure the features described in this document. This logical diagram explains a simple interVLAN routing scenario. The scenario can be expanded to include a multi-switch environment if you first configure and test inter-switch connectivity across the network before you configure the routing capability.

Enable routing on the switch with the ip routing command. Even if IP routing was previously enabled, this step ensures that it is activated. See the Prerequisites section for more information. Tip : Check the show running-configuration. Verify whether ip routing is enabled. The command, if enabled, appears towards the top of the output.

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Make note of the VLANs that you want to route between. In this example, you want to route traffic between VLANs 2, 3 and If they do not exist, add them on the switch.For switching to begin, you must explicitly configure at least one VLAN, even if your network is simple and you want only one broadcast domain to exist.

A group of clients requires that a higher-than-average level of security be applied to traffic entering or exiting the group's devices. A group of clients requires that the group's devices receive less broadcast traffic than they are currently receiving, so that data speed across the group is increased.

how to configure layer 3 vlan interface on juniper ex switch

Assign at least one switch port interface to the VLAN for communication. After assigning one or more interfaces to the VLAN, the interfaces function in access mode. All interfaces in a single VLAN are in a single broadcast domain, even if the interfaces are on different switches. You can assign traffic on any switch to a particular VLAN by referencing either the interface sending traffic or the MAC addresses of devices sending traffic. The following example creates a VLAN using only a few required steps.

Then, three interfaces are assigned to that VLAN, and these interfaces, which function in access mode, transmit traffic among themselves.

how to configure layer 3 vlan interface on juniper ex switch

You can also specify that a trunk interface is a member of all VLANs that are configured on this switch. After you assign one or more interfaces to the VLAN, the interfaces function in access mode. After creating a VLAN, all users connected to interfaces that are assigned to the VLAN can communicate with each other but not with users on other interfaces in the network. The number of VLANs supported per switch varies. Use the command set vlans vlan-name vlan-id? Understanding Integrated Routing and Bridging.

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Let us know what you think. Do you have time for a two-minute survey? Maybe Later. A LAN has a large amount of broadcast traffic.This example describes how to create Layer 3 subinterfaces on trunk interfaces of a distribution switch and access switch so that you can route traffic among multiple VLANs:.

Overview and Topology. Configuring the Access Switch Subinterfaces. Configuring the Distribution Switch Subinterfaces. For the distribution switch, one EXF switch.

This model is designed to be used as a distribution switch for aggregation or collapsed core network topologies and in space-constrained data centers. Configured the necessary VLANs.

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In a large office with multiple buildings and VLANs, you commonly aggregate traffic from a number of access switches into a distribution switch. 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.

One 1-Gigabit Ethernet port on the access switch's uplink module connects to one 1-Gigabit Ethernet port on the distribution switch. Any Layer 2 switch with multiple 1-Gigabit Ethernet ports and at least one 1-Gigabit Ethernet uplink module. To quickly create and configure subinterfaces on the access switch, copy the following commands and paste them into the switch terminal window:. To quickly create and configure subinterfaces on the distribution switch, copy the following commands and paste them into the switch terminal window:.

Verifying That Subinterfaces Were Created. Verify that the subinterfaces were properly created on the access switch and distribution switch. The status is listed as upindicating the link is working. Verify that the distribution switch is correctly routing traffic from one VLAN to another. If all the ping packets are transmitted and are received by the destination address, the subinterfaces are up and working.

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