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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2answers
39 views

When and how are priority values assigned to a frame?

I am currently working with scheduling components that rely on the PCP information that can be found in the VLAN headers. I was wondering when and how these values are assigned to the frames. How can ...
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1answer
20 views

Router on a Stick Switch/Router Addressing

I've been studying VLANs and the router on a stick setup. I created an example in packet tracer that is working fine. Configuration There are 2 VLANs, 10 and 20. The switch port Fa0/0 is an access ...
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How to setup VLAN with one AP to segregate IoT devices? [closed]

I'm new to home networking but I would like to learn how to segregate IoT devices to their own network for added security. Here's what I have right now. Edge Router X Switch Ruckus ICX 7150 AP Ruckus ...
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1answer
22 views

Fail-Safe Network With 2nd Switch?

Is it possible to set up the same VLANs on two different switches with same IPs, but different MACs on dual port network cards? In case switch 1 is down or needs maintenance I would like switch 2 to ...
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1answer
16 views

Port Forwarding using specific VLAN on CIsco RV134W

I would like to forward internet traffic on a specific port to VLAN30 on our network for our security cameras. I have a Cisco RV134W VDSL gateway connected to a D-LINK DGS-1210-28 switch. The port on ...
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1answer
42 views

Using a single device as both a media converter and switch

So I have an Aruba 2530 switch with a couple of SFP slots, an incoming fiber connection and a modem that only has RJ45. There's limited space and I want to use as little boxes as possible. Is there ...
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0answers
32 views

Problems when configuring VLAN on Arista vEOS Router

I'm setting up a network on GNS3 with the end goal of configuring VxLAN. I routed 3 Arista vEOS router together and each of them has a host attached. With basic L3 routing, everything works. I need ...
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3answers
85 views

No internet access on VLAN

I'm trying to setup VLAN on my TL-SG3210 (3.0). I created simple VLAN: vlan 10 name "vlan10" Then, I assigned port 2 & 3 to VLAN. I also created interface: interface vlan 10 ip ...
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1answer
39 views

How to configure loopback for switch management

We have Cisco Switches (Nexus 93). My PC is on vxlan, in vrf "test" with default gateway 60.254. We want to use loopback 99 for managent for switches. We have created a loopback 99 with an ...
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1answer
27 views

Multiple VLANs with PAT

I'd like to know if it's acceptable/possible to use PAT with multiple VLANs, by using the same translated IP address for all VLANs.
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1answer
26 views

Access layer switches uplink mode

We have core, distribution and access layer switches. the switches in access layer connect several workstations on VLAN 20 only. we have DHCP server on VLAN 1 but is on another switch with all servers....
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0answers
12 views

InterVLAN routing on Cisco router with multiple trunks [duplicate]

I recently came across a scenario where I wanted to (ab)use a Cisco router (ISR 4331) as a layer 3 switch. The router is directly connected to two switches. The connection between each switch and the ...
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26 views

PVLAN on juniper- native isolated VLAN & trunk

I'm trying to use PVLAN to isolate devices (servers) on a L2 network from each other. However, these devices are currently sit on trunk ports, because they have VLAN-aware IPMI interfaces. My config ...
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1answer
51 views

What would happen if I connect VLAN aware NICs via a hub?

What would happen if I connect VLAN aware NICs via a hub? The vlan tagging is enabled and the hub here means a device that electrically connects the lines together. Would the frames with different ...
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1answer
54 views

DHCP Help 3560-CX + Aruba AP515

The problem VLAN 100 is not assigning IP address to the SSID Guest from the AP, but Aruba is Tagging the SSID to be VLAN 100. How do I get the Switch to assign the DHCP? On the switch, it seems to ...
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1answer
40 views

Why I can't ping my switch Vlan99?

In the following network, I have configured every device but somehow I can't ping my Customer-PC and Technical-PC to PasirGudang-SW and Segamat-SW. The PCs can ping the other ip address just fine ...
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0answers
14 views

MRV OptiSwitch “action tag nest”

What does this command does in an MRV OptiSwitch ? action tag nest [VLAN X] The configuration of the whole rule is the following : rule 1 action redirect port X action tag nest [VLAN X] tag eq ...
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0answers
15 views

DATA & VOICE VLAN ROUTING BETWEEN 2 ROUTERS [closed]

Good Afternoon All- I would appreciate a little help with a current issue I am facing... I can ping all Network Segments, all Routers, all Switches, and all Servers on the network. PROBLEM IS: I CAN'T ...
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2answers
103 views

OSPF with 2 Routers, N redundant links

I'm having a hard time trying to find a solution, and I can't seem to find anywhere on the web exactly what I need. We need to configure 2 Routers (MOXA EDR 810) to have N redundant links between one ...
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1answer
42 views

Is it possible to configure Cisco ASR901 as a layer 2 VLAN switch?

I have been fiddling with a Cisco ASR901 for a while now, but I can't wrap my head around configuring it as a layer 2 VLAN switch. Is it not possible to configure one of its Gigabit Ethernet ports as ...
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1answer
16 views

IPFIX vlanId element in access switchports

According to IANA definition, IPFIX elementId 58 vlanId is: Virtual LAN identifier associated with ingress interface. For dot1q vlans, see 243 dot1qVlanId. But according to RFC5102: Description: ...
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1answer
28 views

is private Vlan concept an alternative for access-list configuration?

is private Vlan concept is introduced by cisco for alternative for access-list to segregate traffic among different Vlan and within same Vlan .
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1answer
67 views

With reference to Juniper MX , what's the difference between Bridge Domain and Learning Domain?

I am trying to understand the difference between bridge domain and learning domain. I have tried to read through documentation and Juniper MX series book but no success. Need to understand the ...
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2answers
26 views

How does the VTP Client update it's information if the revision number is equal?

I am new to networking and my questions may be a bit weird. Please correct me if I am wrong. According to what I understand, Client updates it's information with the Server's if the Server's revision ...
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2answers
80 views

transfer vlan from one cisco switch to an other through a central cisco switch

I can't figure out how to pass one vlan from one switch to an other: Let's say, I have 2 valns: Vlan 1 and Vlan 2 3 cisco switches: Cisco Catalyst 3560g (central switch) Cisco SG-300 (with native ...
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1answer
88 views

How do I apply an access list on a switch?

I'm configuring a very small network on packet tracer 8.0 and I have a single 2960-24TT switch which is connected to 2 PCs and 1 router. Everything is on the 24.17.2.0/24 network and I added a VLAN. I ...
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1answer
55 views

How to connect to different VLANs through VPN

I have the following setup: I have setup a Layer 3 Switch with multiple VLANs Multiple devices are connected to it on different VLANs via untagged access ports There is also a router connected to the ...
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1answer
32 views

Do unicast frames get sent to all switches associated with the target VLAN?

If a network topology has a VLAN which spans multiple switches, what happens if a frame is sent to a MAC address that is connected to the source device's "home" switch? By that I mean if a ...
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1answer
59 views

Design question: VLANS or Routed interfaces over dark fiber between sites seperated by 10s of km

Production network design idea: 7 sites total. Each site has an HP Procurve core switch. Each switch has at least 2-10G dark fiber connections to other sites. A few links are under 40km, the remaining ...
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1answer
156 views

pFsense, Unifi AP, HP switch and VLANS

I have a Unifi AP with a single MYNET SSID connected to my HP 2520 switch on port 23. I have a pfSense LAN interface connected on port 1. AP clients get DHCP (192.168.1.0/24) from pfSense and can ...
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2answers
84 views

Tagging a VLAN or not

I want to create a wi-fi network for guests using access points. I asked to the IT provider a dedicated network with its VLAN and it is: 172.16.0.0/24 VLAN ID 344 The above network is configured on ...
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0answers
17 views

Merge (and split) 2 different LAN in one Cable with VLAN? [closed]

I am searching for a way to connect two different buildings with one GB Ethernet Cable. On both LAN i have two different routers with different subnets that needs to be remain in the new building. The ...
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1answer
125 views

pfSense - Trunking VLANs on LAGG vs. individual links

We are a small business. I am running pfSense on a decommissioned developer's PC. We have also a Cisco SG 300 L3 switch, capable of VLANs and LAGG (link aggregation). I am going to do RoaS (router on ...
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1answer
24 views

client has 2X1910 switches 1x1920 switch traffic not passing correctly some nodes are responding to pings and others are not [closed]

New to vlans, bridging across multiple L3 switches and not sure where to start so here goes in hopes of learning Layout is this 1910-24g-POE (Switch01)>>>>>>>>>>>>&...
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2answers
67 views

Transfer subnet needed between Firewall and Routing Switch?

When looking at the image, the Switch is routing capable (L3) and is the default gateway for clients in the LAN. We plan to introduce a new Firewall and stand before the question if we should give its ...
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1answer
44 views

Is it possible to configure DHCP on a router or UTM firewall for the multiple VLANs on L3 Switch?

I'm working on expanding our office network to accommodate more users/devices. Currently we have the DHCP configured on a UTM firewall(cyberoam ing50) device(cum router) providing IP addresses for ...
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1answer
72 views

Cisco IPsec VPN tunnel problem

I have a problem with VPN configuration. This is the topology I created: First updated licenses to make the VPN available: license boot module c1900 technology-package securityk9 IPsec Router ...
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1answer
133 views

Cisco IOS Software [Everest], ISR 4331. Vlan+Vrf+Dhcp

I'm looking after to use a setup with that objectives in mind: Create a subinterface on interface GigabitEthernet0/0/1 create a Vlan and assign it to that subinterface create a vrrf and assign it to ...
2
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1answer
48 views

Port only in trunk mode vs encapsulating the frame

A network with 2 switches, each switch has 2 vlan, one called vlan 10 and another vlan 20. A port-channel with 2 uplinks (trunk). Why in a layer 2 scenario I don't need to configure the trunks with ...
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1answer
39 views

STP with Vlan, uses normal configuration only?

In a network with redundant vlan trunks, does the STP run normally on the trunks or does it need to do any more configuration? Thanks!
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3answers
48 views

L3 switch vlan routing to another gateway

I have a allied telesis switch with VLAN10 & VLAN 20 and a basic ISP Router with no VLAN configuration. ISP router IP is 172.30.50.253 PC1: 172.30.3.x/24 Gateway 172.30.3.254 VLAN30 interface ...
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2answers
62 views

Per-VLAN DHCP pools on the switch

Let us say I have a switch on which I have created two VLANs 10 and 20. I have set ports 1-10 to be on VLAN 10 and ports 11-20 to be on VLAN 20. Presently the PCs in both VLANs are configured with ...
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3answers
130 views

How to create/delete multiple VLANs in a single command?

If I want to create 3 VLANs, I've to do it one by one like this. conf t vlan 2 vlan 3 vlan 4 Same thing goes with deletion. conf t no vlan 2 no vlan 3 no vlan 4 Is there a way to do it in a single ...
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0answers
13 views

Why does Cisco recommends NOT to use VLAN 1 as Management VLAN? [duplicate]

According to the following article; https://www.omnisecu.com/cisco-certified-network-associate-ccna/what-is-management-vlan-and-how-to-configure-management-vlan.php Cisco recommends NOT to use VLAN 1 ...
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2answers
767 views

Can't add VLAN in the “allowed VLAN”

Why is this command not accepted? switchport trunk allowed vlan add 52,160,176,177,247 I tried adding only one VLAN; it's also not accepted. No error is shown or anything; it's just not showing when ...
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2answers
52 views

Need explanation on vlan tag/ip mismatch

What happens if I have a switch configured with an accessport on vlan 20 and someone uses a static ip in a different subnet. vlan 20 has the subnet 192.168.20.0/24 in the router. Suppose the ip used ...
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2answers
125 views

How to connect two different subnets

This may be a very basic question, but I'm a networking newbie. So I have the following setup: Server with one NIC on IP 192.168.10.1/24 (Network A). It is not possible to change this IP. Computer A ...
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4answers
2k views

Difference between SVI and subinterface

Modern multi-layer switches seem to support both SVIs (switch virtual interfaces) and subinterfaces concepts. Both are virtual layer 3 concepts used to perform routing functions and some equipment ...
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1answer
47 views

Interconnecting sites with different networks and VLANs

I've got three sites, let's call them Production Plant, Remote 1 and Remote 2. They're not big networks. The Production Plant has two internal networks that has control systems designed for all being ...
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1answer
53 views

VLAN not working in ComNet switch [closed]

I'm trying to configure VLANs with 3 switches ComNet (2- CNGE2FE8MSPOE + 1- CWGE26FX2TX24MSPOE) and it's not working as I expect. It's the first time that I work with VLAN and I don't know If I didn'...

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