Questions tagged [vlan]

For questions about Virtual LANs (VLANs) which are used to divide what otherwise would be a single OSI layer-2 broadcast domain into multiple, logical OSI layer-2 broadcast domains.

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votes
1answer
3k views

Trying to configure HP Procurve VLANs to segment Unifi guest traffic to another network

My goal is to put all guest network traffic from the Ubiquiti Unifi access points onto their own subnet using VLAN 20 on a series of HP Procurve 2610-48-PWR switches. The Unifi Access controller ...
4
votes
1answer
856 views

Creating multiple trunk ports on a Cisco ME3400

I have a cisco ME 3400 switch . And I have configured fa0/23 as trunk port and connected this to a router for carrying multiple vlan traffic. And i have created some vlans eg: 1500, 1501 etc and added ...
4
votes
1answer
1k views

VLAN assignment based on mac-address or RADIUS attribute

I'd like to know how to assign someone's client device to a different VLAN based on MAC address of that device.What kind of hardware/software would make this solution possible (if possible at all)? ...
4
votes
1answer
349 views

Port Channel Hybrid Port Issue

I have a Dell Sonicwall NSA 4600 running the latest firmware with an Interface that's configured to have a secondary redundant port. This interface also has a VLAN sub interface assigned to it. On ...
4
votes
1answer
188 views

How can I config a route to cross VLAN?

I have a network topology like bellow: In the server A(left), I want to access the Server B(right). But in A there only two network interface, and they are all import, so I can not change any of them,...
4
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2answers
3k views

SG300 - no traffic across trunk

This one's got me banging my head against a wall... likely a simple answer, but I've tried everything I know. I heard the internet's a smart place. :) Have an SG300-28MPP connected to a clients' ...
4
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2answers
6k views

RADIUS VLAN Assignment with Cisco ISE

I am trying to install Cisco ISE 2.1 to be used as a RADIUS server with 802.1x on my switches. I want to dynamically assign a VLAN based to a user who connects on the switch port. The problem is that,...
4
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1answer
631 views

I have two vlans on the same router that can't ping each other

I'm using the student version of cisco packet tracer 6.2. I have two vlans that are connected to the same router but they can't ping each other. Here is the config from my router and my switch. My ...
4
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1answer
4k views

Cisco ASA and BVI interfaces

I'm in the middle of equipment migration and the setup is somewhat similar to Mike's (Configure Cisco ASA in Transparent mode: Layer2 DMZ w/ Vlan translation) but with a difference that I need the ...
4
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4answers
413 views

How do I fix my vlans connection to the Internet?

I have the following abridged configuration for a Ubiquiti switch: interfaces { ethernet eth1 { address 192.168.4.1/24 vif 101 { address 10.10.254.1/24 } ...
4
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1answer
916 views

Is it possible to assign each vlan to a physical port on the ZyXEL USG40?

I'm trying to configure a ZyXEL USG40 to act as a switch that can physically separate 3 vlans from each other. I was told this product would be sufficient to setup a company network with 3 separate ...
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2answers
1k views

IP Phones causing printing issue

Background We have Mitel IP phones. The phones use dhcp option 125 to get configuration information, and this tells them to use 802.11q tags for vlan id #5, with address range 192.168.16.0/24. Our ...
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0answers
111 views

PVLANs/Port isolation in IPv6 networks

We're currently using port isolation to prevent communication between computers on the same vlan and use client isolation on our guest wifi. The reason for having this enabled is to prevent unwanted ...
4
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2answers
2k views

Subnet-based VLAN assignment on Cisco

Is it possible to assign a switch port to a VLAN based on the fact that the host IP address is on a certain subnet? I have found the following references from HP and Netgear, but I have been unable ...
3
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3answers
25k views

Is it possible to access more than one VLAN?

If I have a layer 2 switch, is it possible to access two VLANs from one computer? VLAN1: 192.168.1.x with netmask 255.255.255.0 VLAN2: 192.168.2.x with netmask 255.255.255.0 If my computer has only ...
3
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2answers
431 views

Is there 64k range VLAN support?

All i have learnt and understood so far about VLAN is - we can create a max of 4k VLANs (subjected to platform capability). However, as per the protocol 802.1Q there is only 12 bits kept for ...
3
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8answers
1k views

Trunk port or access port?

In a colo/DC environment, if you had a customer wanting to do their own VLANs & subnetting, would you configure the port going to their L3 switch as a trunk port or an access port?
3
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3answers
1k views

Do VLANs within a subnet need to have their own subnet for router on a stick?

I have been creating a network lab in packet tracer for practice. I have 3 vlans in subnet A and I am trying to configure router on a stick at gig6/0 on the bottom left of the image. Do I need to ...
3
votes
4answers
38k views

Deleting VLAN on Cisco 887

How can I delete a VLAN config from a Cisco 887VA with IOS 15.3? For some testing I have created VLAN2 and no longer need it but now I can't get rid of it from show running-config. From config mode ...
3
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2answers
766 views

Benefits of employing devices that support vlan trunking

What are the benefits of employing devices that support vlan trunking. Would this feature be a useful addition for a symmetric switch that has no support ether channel?
3
votes
2answers
8k views

Multicast between VLANs

I've following scenario Upper computer on VLAN 10 is sending some multicast messages and lower computer on VLAN 10 sends IGMP join periodically. Lets say MC address is 224.1.1.1 Now, computer on ...
3
votes
3answers
8k views

Block communication between hosts in the same VLAN

I've a pfsense firewall with a managed switch, and i created a VLAN: all works fine, but what i want to do is to block the communication between the hosts in my VLAN. For example, i want that an host ...
3
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2answers
1k views

Does it make sense to map a VLAN to each LAN?

I saw a picture of a network-structure with VLANs in it: Why would somebody structure their network like this? Does this even make sense? I mean, they are in a different LAN, why then mapping a VLAN ...
3
votes
1answer
126 views

Switching interface VLAN ID Mid-Production

I was wondering if there was a way to switch out the VLAN ID from VLAN1 to VLAN10 without impacting the connectivity of the end users? Can I simply copy and paste from one interface VLAN to another? ...
3
votes
3answers
932 views

A VLAN maps several subnet

I've read the post Multiple Subnets in a VLAN and am wondering about the possible conflicts when using several subnets in a VLAN. The recommended design is of course put a IP subnet in a VLAN. If I ...
3
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2answers
27k views

What is difference between standard VLAN extended VLAN?

I know that the range of standard VLAN is 1-1005 and in extended VLAN the range is 1-4094. But is just range is the difference?
3
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3answers
986 views

Basic VLAN setup

I want to create a closed network (Vlan 1010) with internetaccess but I am new to tagged and untagged ports. I have a Netgear switch. This is my current setup: TG = Firewall WAN Office = Office ...
3
votes
1answer
3k views

Should a server have it's own VLAN?

If I have a subnet that contains approx 40 hosts. If I am to have 2 servers max, that are strictly for the use of this subnet, should I have them on a seperate VLAN in the subnet so that they do not ...
3
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4answers
987 views

Explain what is Virtual LAN

Can someone simply explain what Virtual LAN is and how it works? Or you can clarify the Wiki article: A virtual LAN (VLAN) is any broadcast domain that is partitioned and isolated in a computer ...
3
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2answers
4k views

Untagged VLAN to Tagged VLAN

I am still new to VLANs and the concept, so please bear with me... We have a core switch to handle all of our traffic, then other switches are connected to the core switch from different areas of the ...
3
votes
3answers
5k views

Multiple VLANs to a router with OSPF

I have a Layer-3 switch with three VLANs and a router, using OSPF routing protocol. My current setting: A router with router-id 1.1.1.1 An interface connect to L3 switch with 192.168.2.1/24 A L3 ...
3
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1answer
2k views

Should my layer 3 switch rewrite this MAC address?

I have the following routing table: say I get packet with dest IP 10.5.89.34 and the next hop IP is that of a logical VLANIF94 interface. please explain what all steps will happen here like MAC ...
3
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1answer
1k views

Cisco ASA 8.2(5) same security routing issue

I have an ASA 5510 running 8.2(5) with the following configuration and I am having problems routing traffic between sub-interfaces at the same security level. Although not shown there are ACL's for ...
3
votes
2answers
3k views

Layer 3 Switching in Packet Tracer not working

I am studying for ICND1 through CBTNuggets, I recently watched videos on how to interact between different vlans using separate interfaces, sub-interfaces and Layer 3 Switching. The first two worked ...
3
votes
1answer
199 views

cisco switchport trunk native vlan

we have switch catalyst 3850 and we need to enable the PXE boot on a port configured in trunk with configured three VLAN (4040, 4050 and 4060). To permit the PXE boot and deploy to work we set on the ...
3
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2answers
2k views

HP switch "No untagged port"

A network engineer showed me the show vlan output of an HP switch. I know tagged ports are trunk and untagged ports are access in Cisco terms. But can anyone explain the "no untagged port"? How is ...
3
votes
3answers
627 views

What is the actual purpose for having a 1:1 ratio between VLANs and subnets?

I understand the technical difference between a subnet and a VLAN. After looking through questions related to this topic, including: VRFs, VLANs and subnets: difference VLANS vs. subnets for network ...
3
votes
2answers
707 views

Change VLAN id in trunk

I have 3 L3 switches. They're connected to each other with a trunk (in which I need to define the allowed VLAN's). On SW1 I have for example vlan 100. On SW3 I also have vlan 100, but it's another ...
3
votes
1answer
637 views

Performing HSRP for routers

On the right side you can see 2 multilayer switches. With those two switches I want to enable HSRP for each WAN router. What has to be done in order to accomplish this? and why? [
3
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2answers
3k views

Does NAT address need to be the default gateway?

I will use a firewall for NAT. The firewall will be part of a VLAN and will translate a machine network IP address for domain access requests. Should I set the devices on the network to use the ...
3
votes
2answers
3k views

Cisco CDP is dot1q native tagging required?

The only way the router could receive CDP advertisements over a switch trunk, was by creating a sub-interface on the router with "encapsulation dot1Q 1 native" configured. If this sub-if was ...
3
votes
2answers
4k views

hpe 5700 (comware 7) vlan routing

I want to divide my network into smaller segments. I want to use our HPE FF 5700-40XG-2QSFP+ switch as the router. It runs comware 7. VLAN 101 for servers, using 10.101.0.0/16, interface ip 10.101.1....
3
votes
1answer
1k views

Juniper EX4200 How to read SNMP traffic counters for specific VLAN id from trunk interface?

I have multiple q-in-q S-VLANs assigned to the trunk port ge-0/0/0. How can I read SNMP traffic counters for a specific VLAN id (S-VLAN) on that trunk port? Hardware is Juniper EX4200-24F. For ...
3
votes
3answers
9k views

Native VLAN on a router subinterface (RoAS)

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, sub-interfaces can be defined ...
3
votes
1answer
182 views

Access control on Cisco router with switchports?

I am working with a series 800 router which has inbuilt switchports. I want to use 2 switchports for a VLAN (say VLAN 100). On one port will have devices: 192.168.1.10 192.168.1.30 Connected to ...
3
votes
4answers
18k views

How many vlans we can create in one single port

May I know how many vlans can be create and configure in single port and we can access in switch??? If we create the vlan and if we assigned one port to particular vlan, I thought that should be ...
3
votes
2answers
544 views

Trunking across different switch makes

I have a Dell N3132PX running 6 different VLANs. (192.xxx.xxx.10) VLAN 2 is my management VLAN for my switches. VLAN 3 is my DHCP network running production level for users. Port 25 (Untagged) VLAN ...
3
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2answers
403 views

Does Network Device Management VLAN Need To be On An Access Port Or Can It Travel In A Trunk?

SO I am building a network of 6 switches. 1 primary switch would feed a trunk of 4 VLANs to 5 other switches directly (i.e. all coming from the primary switch). To keep the switches secure I want to ...
3
votes
1answer
278 views

Vlan through ISR - Catalyst - Nexus doesn't work

I try to create a Vlan that route traffic through multiple Cisco Devices. For that I create a vlan13 on each device and setup a IP on the ISR and the Device attached to the Nexus also have a IP on the ...
3
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3answers
563 views

Inter-vlan routing with unmanaged switch?

I have a Cisco 3650 with inter-vlan routing enabled. All vlans reach each other with no problems. The problem appeared when I connected an unmanaged switch to an interface on the cisco. I set up a ...

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