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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2 subnets no VLAN [on hold]

Say I want to allow two subnets 10.10.0.0/24 and 10.10.8.0/24 talk to each other on the same network without using VLANs, what do I need to do? A layer 3 switch? How would I configure it?
0
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1answer
31 views

Cisco SMB Switch Configuration for VOICE VLAN and DATA

I am hoping to get some assistance with a current issue I am facing at the moment... I have 3 Cisco SMB Switches, (2) SG300 Managed Switches and (1) Unmanaged Switch. SWSG1 | 172.16.1.100 | Port 24 ...
2
votes
1answer
166 views

How are packets handled and prioritized over a link with multiple VLANS?

So, the question is this. I have a Cisco router with multiple VLANS assigned to a single Gigabit port. 100,200,300, etc. as well as the normal connection without any vlan tagging. Now, everything ...
0
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1answer
27 views

VLSM - Two Routers 4 Switches 2 Subnets 1 server

im looking to create two different subnets withing this setup, is that possible? But there are some pcs from switch 1 that are from subnet1 and others pcs from switch 1 that are from subnet 2 so ...
0
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0answers
10 views

WatchGuard interface with secondary router holding WiFi splash page

I have a captive portal splash page I need to be presented to only 1 Open Wireless SSID on a WatchGuard AP controlled via the XTM330. The WatchGuard is not able to present the required splash page ...
3
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1answer
103 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? ...
0
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1answer
28 views

JUNIPER EX-2200-C Layer 3 Switch Configuration

I am setting up attempting to simulate a small infrastructure of Clients and Servers. Current Setup 1x. Dell Inspiron Tower Running ESXI 6.5 1x. HP Z800 Workstation Running ESXI 6.5 1x. Juniper ...
0
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1answer
25 views

Why does this setup fail sometimes with Juniper EX4200?

I've got a very straight forward setup with the following devices: 1 x 10G Fibre uplink (internet) 1 x ASUS AC68U wifi router 1 x EX4200 20 x Servers (With IPMI and single ethernet) The EX4200 is ...
0
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1answer
41 views

Why Access ports should have the same trunk native vlan? [closed]

In the current switch Management VLAN is 48. Can you please someone explain it to me, why we dont give trunk native VLAN as 48, and we configure the same as access VLAN? Thanks in advance.
0
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1answer
25 views

Meraki MX64, CISCO SG200 Switches, VLANS

Having issues with allowing traffic across VLANS. I have setup a Meraki MX64 and Cisco SG200 Switches to use 5 VLANs (1-5, 1 = default). I configured some ports on the switches to be members of 2 ...
1
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2answers
30 views

Private Vlans - Promiscuous port [closed]

If I had a private vlan on my switch, can it communicate with a 'normal' vlan on that same switch ? Is it only between secondary private vlan that communication is restricted ? It seems to be the ...
1
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1answer
77 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
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3answers
66 views

JunOS, access mode interface asks for a vlan

I'm kinda new to networking so I'm going to do my best to try explain my issue. The issue that I have is that I want to delete all default configuration for my xe interface. Current configuration: ...
2
votes
2answers
53 views

wifi and vlans problems

I was given the task to come up with network design to change the existing one that we have since we are running a single network in the company with no VLANs in place to separate de departments. On ...
2
votes
1answer
36 views

How to see vlan access-map matches?

I have created vlan access-map in my Cisco Catalyst 2960X to block https traffic: ip access-list extended no443 permit tcp any any eq 443 vlan access-map block443 10 match ip address no443 action ...
1
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2answers
73 views

Traceroute showing inter-vlan routing?

I currently have two different devices (one server and one client device) that are on separate VLANs (VLAN 5 and VLAN 10 respectively). When the client device runs a tracert to the server, the tracert ...
5
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2answers
88 views

Interface VLAN IP address not on exclude list?

Does an IP address need to be included in a ip dhcp excluded-address x.x.x.x if its already included in an interface vlan? Examples: ip dhcp excluded-address 10.3.8.1 10.3.8.20 interface Vlan30 ...
4
votes
1answer
58 views

Best Practice for Voice and Data VLAN on single port

We have multiple interfaces currently configured with the below on our Cisco 3750x switch. interface GigabitEthernet1/0/21 switchport access vlan 4 switchport trunk encapsulation dot1q switchport ...
2
votes
2answers
108 views

NAT VLANS with same IP subnets and same IP addresses

I want to do something very similar to NAT VLans with same IP sub-nets but it is dissimilar enough that I don't know how to apply it to my application. I did find NAT Overlapping but it places ...
1
vote
1answer
30 views

Why can't devices belonging to different VLANs but to same network talk to each other?

In the diagram above, when two PCs belonging to same network like 192.168.1.10 /24 and 192.168.1.20 /24 but to diffrent Vlans, I suppose they cant't communicate each other. Now, I wonder how both PCs ...
3
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2answers
371 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?
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0answers
17 views

pfsense CARP with VLANs duplicate default route

I have set up a 2pf CARP with VLANs. So far everything works well however I wonder why and if it is a problem that I get on the VLANs a duplicate default route. My DHCP on the VLANs is of course set ...
4
votes
1answer
89 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,...
2
votes
1answer
37 views

Question about Ubiquiti Edgemax switch syntax and VLANs

I've been beating myself over the head with a keyboard trying to figure this out. I'm used to switchport syntax on Adtran and Cisco switches, but I've got this situation with a Ubiquiti EdgeSwitch 48 ...
4
votes
1answer
75 views

Same Vlan Name / ID on different switches network subnet same or different?

I have several switches (some on same floor and another on other floors) all connected to core layer 3 switches through trunk links. One of the vlan id / name is repeated along the switches. May I ...
0
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0answers
41 views

NAT setup for two LANs on same router

We have a moxa edr 810 series router , we have few devices connected to the router as below. We are using IPsec tunnel for VPN. From VPN we are able to connect Device 2 , but not able to connect to ...
4
votes
3answers
136 views

Do I need to add something to support inter-VLAN communication?

In my network using Cisco router/SW C1111-8p, the native VLAN 1 is not connected and doesn't have IP. VLAN10 192.168.10.1/24 with vlan10 DHCP pool VLAN20 192.168.20.1/24 with vlan20 DHCP pool Both ...
1
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2answers
52 views

What happens when DHCP client and server are on different VLANs [closed]

I'm trying to create a lab on PT and I've attached an image. But for some reason my PC is not able to get an IP address from the DHCP server. There is no issues with layer 1 and layer 2. I checked ...
2
votes
1answer
35 views

Capture filter for vlan tagged packets and non vlan tagged packets of specific ethertype

I am trying to capture traffic of ethertype 0x88b8. Some of them may be vlan tagged and some of them might not be, but the and and or operators are not behaving in the way I expect. My first attempt ...
1
vote
1answer
21 views

Permit only WEB server in ACL on router? [closed]

In that topology I need to configure 192.168.1.0/24 will block 10.10.20.20 host 192.168.2.0/24 will block 10.10.10.0/24 network All users can view web page but can't ping etc ... I done that top 2 ...
0
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4answers
139 views

Why do Vlans need routers to communicate?

Why do devices on two separate VLANs (Virtual LANs) implemented on the same switch require a router to communicate?
0
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2answers
55 views

Cisco Catalyst pseudo interface?

I think I remember reading somewhere that you could have multiple VLANs assigned to a single interface by way of a pseudo interface. Googling with that vocabulary doesn't return proper results though, ...
0
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0answers
19 views

Virtual Local Area Network [duplicate]

Why do Devices on two separate Virtual Local Area Network implemented on the same switch needs router to communicate.
3
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2answers
107 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 ...
22
votes
8answers
4k views

Why can't devices on different VLANs, but on the same subnet, communicate?

I have a question about switching. I have two devices connected to a switch with IP addresses 192.168.5.20 and 192.168.5.10. Both devices have the same prefix, /24. That means they are on the same ...
3
votes
3answers
451 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 ...
0
votes
3answers
77 views

Switch syntax, vlanXX and vlan [space] XX

How does a switch OS know that this is the same syntax? There are certain commands where you might reference the vlan like so "switchport access vlan 35", (a space between vlan and the number) and ...
0
votes
1answer
72 views

On a 3560E Switch

** Attempting to view IP address of a Non-Cisco device connected to the switchport. Already entered show mac address-table int gi0/35. Got the mac, then tried the sho ip arp vlan 120 | include ...
0
votes
1answer
67 views

Configuring HP Smart Switch and SonicWall with VLAN

I'm trying to configure an HP SmartSwitch with a Dell SonicWall on a VLAN for some computers in our network. The computers in question are on port 37 on the switch. I've created a new VLAN interface ...
0
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0answers
12 views

Subnetting help [duplicate]

I am sorry if this is a simple question, but I am a little overwhelmed and I can't seem to grasp what I need to do. Long story short, I took over a network that was poorly designed in my opinion, but ...
0
votes
1answer
54 views

What's the difference between dot1dTpFdbPort and dot1qTpFdbPort, and what are the octets before the last 6 (

So ... I kinda struggle to understand the difference between dot1dTpFdbPort Either the value '0', or the port number of the port on which a frame having a source address equal to the value of the ...
6
votes
2answers
301 views

VLAN Interface is down, protocol is down

I have Cisco Layer 3 switch with IP routing enabled on it. I have different VLANs configured on it and its working perfectly. Now i have added another VLAN (SVI) and assigned that VLAN to one of the ...
1
vote
1answer
80 views

Switch Configuration for Connecting LAN and WAN

Totally new on networking and on switches, so excuse me if I use some wrong terminology. Problem I have 1 computer and 7 instruments. I would like to form a network setup fulfilling the following ...
5
votes
1answer
376 views

Assigning a single switchport to different VLANs

I've been trying to figure out how to achieve the outcome below. VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- ...
0
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0answers
18 views

DTP On Trunk Ports [duplicate]

When Statically Configuring a Port As Access, DTP Will Be Automatically Disabled. So Why Is It When Statically Configuring a Port As Trunk, DTP Will Still Be Enabled?
0
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1answer
41 views

VLAN setup for three Servers [closed]

As per below, i have setup a VLAN for three servers. Do you know if this is correct?
2
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1answer
49 views

Can I route a VLAN on a Sonicwall to use a different gateway?

Here is my scenario. I have a Sonicwall with LAN 192.168.16.x with a VLAN(VOIP)of 10.10.20.X The PBX has a 192.168.16.X IP The ISP just installed a ESBC on the network and I gave it a 192.168.16.x IP....
4
votes
2answers
58 views

Control traffic between two switches

Two catalyst switches connected to each other and all ports of both are in VLAN 2. Ports that connect both switches are access ports (no Trunk) as both switches' ports are in VLAN 2, no any other VLAN....
1
vote
2answers
67 views

802.1X Auth for Clients and Servers

I'm about to introduce 802.1X Authentication to my current network for wifi and wired connections: My Setup: I have a Windows Domain Controller and I wanted to use the Network Policy Service for ...
4
votes
1answer
622 views

MAC Address learning process

Does a switch learns hosts mac address in these following scenarios: Switch port configured as access and frames received tagged on different VLAN Switch port configured as trunk and frames received ...