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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Why is routing not working on my Dell N2048 switch

I am in the process of replacing some older Dell Powerconnect switches with a some Dell N2048 switches. While doing this I wanted to go ahead and segregate certain areas of my network using VLANs. ...
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4 votes
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133 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 ...
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Arp Protect in dynamic VLAN environment

I am using 802.1x authentication with dynamic Vlan assignment(CPPM). As you may know, when a user logges in to their computer, SW attaches the user port to related Vlan. Thinking the scenario in which ...
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3 votes
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Can I do Q-in-Q vlans between Dell and Cisco switch

Our Head Office is connected to our DR location between an L2 tunnel provided by our ISP. I need to establish a Q-in-Q setup between both sides to pass multiple VLANs through. Our head office has a ...
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3 votes
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802.1Q-2014 I-Tag and MAC addresses

I am reading IEEE 802.1Q-2014 for interest. This incorporates I-Tags, which define backbone service instances. In a few places, the standard implies or states that the I-Tag includes the C-DA and C-SA....
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Cisco C9300 Drop Out And VLAN Table Loss

I have a Cisco C9300 is one of my main racks. Recently it has been restarting on it's own. My suspicion that the PSU is on the way out. Strange part is when it does this the VLAN table resets to ...
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  • 389
2 votes
1 answer
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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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2 votes
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375 views

add VLAN access ports to a VSI (HP)

I'm trying to understand how VLANs work in conjunction with VSI / VPLS. I'm using two HP A5800AF switches connected through MPLS. Specifically, I want to associate a port on each side with a specific ...
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2 answers
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Cisco 2960 not receiving dhcp from the router

I have a problem with Dhcp of some the Vlans. here is how my network is : I have a router ASR1001, which connects 15 switches(2960) as a ring topology. each switch has a subinterface of the router ...
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  • 121
2 votes
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How can I configure intervlan routing using SG300-10, SG300-28MP, SG200-50 and RV042

I need help configuring inter-VLAN routing. I am setting up 2 VLANs plus the admin VLAN 1 as follows: RV042 is used as a firewall (i'll probably replace it with something else) LAN ip addr 10.1.1.10 ...
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1 vote
1 answer
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Cisco ISR 4000 series with SM-X Layer 2/3 module

I have a Cisco SM-X-16G4M2X Layer 2/3 Service Module installed in an ISR 4000 series router, and I would like to configure its ports as level 2 in a vlan, and then configure that vlan with an IP ...
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asa vlan subinterface over s2s ipsec tunnel to IOS router

I am trying to configure wireless traffic that is a separate vlan subinterface on an ASA to travel over a site-to-site vpn to an IOS router. i have the static NAT set up to go from the (wifimain,...
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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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Using a switch to dynamically connect and disconnect multiple devices together in a point to point configuration

I have an interesting issue. I have to use a switch to dynamically connect and disconnect multiple devices together in a point to point configuration, without changing anything on the end user side. ...
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Connecting layer 3 switches together without trunking

I currently have 2x Juniper EX4200 and I'm looking into changing it into Ubiquiti EdgeSwitchs. The diagram: SW01 and SW02 are connected to each other using OSPF P2P. Both of the switches have their ...
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How to check vlan interface traffic on Cisco nexus 9k

I have Cisco N9K-C9396PX L3 switch which has VLAN interface configured for my LAN gateway and i want to monitor how much traffic vlanXXX handling, I have configured SNMP monitoring to pull interface ...
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Network segmentation with VLAN and MAC auth: thoughts about implementation

Currently we have a medium-sized, flat network with some DHCP pools. This configuration isn't satisfying us anymore, as everyone can see everything on the network and it may leads to security issues. ...
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Brocade VDX 6740 VLANs and dual-mode

We have a VDX 6740 that serves as a switch for our SAN for our vSphere environment. We've introduced a new SAN that we'd like only one host to have access to. As I have it setup now: VLAN 2 for SAN ...
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400 views

HP ProCurve 6120XG with Cisco configuration

ProCurve 6120XG Blade Switch with Cisco trunk I have c7000 HP blade Center with ProCurve 6120XG Blade Switch and i am creating trunk to my TOR1 Cisco switch (Nexus 3064), but having issue related VLAN ...
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1 vote
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Configure pfSense VLAN Trunk

I have setup a pfSense box as a transparent firewall between my Cisco router and first Cisco switch: CISCO ROUTER - 10.10.1.253 ↓ PFSENSE - OPT1 BRIDGE - 10.10.1.252 ↓ CISCO CORE SWITCH - 10.10.1.250 ...
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1 vote
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509 views

Traffic Statistics per VLAN

I'm using Huawei s6720 and I would like to monitor traffic per vlan, example: # Interface GigabitEthernet0/0/6 port link-type trunk port trunk allow-pass vlan 200 300 400 500 # I can verify ...
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1 vote
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427 views

Problem configuring L3VPN with MPLS, RSVP-TE, VLAN

We are having problems to configure a L3VPN in VIRL with an MPLS CORE NETWORK that uses RSVP-TE as label exchange protocol and IS-IS as IGP protocol. The idea is to distinguish different type of ...
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1 vote
0 answers
278 views

Vlan translation and Swapping

Heey, all As an ISP provider, We are trying to connect Multiple customer sites via our Mpls core. our plan to give each customer site a different vlan ( c-vlan) and then translated to S-vlan to ...
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1 vote
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62 views

How does Fabric Connect protocol work?

What are the algorithms that are used by Fabric Connect protocol/protocols to choose the best path to forward a packet? I know that Fabric Connect is used to replace the Spanning Tree Protocol that ...
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1 vote
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721 views

Juniper EX3300 and Q-in-Q

I have a Juniper EX3300 switch that has a 10Gbps connection to our upstream provider. Our upstream provider (lets call them Provider A) passes us various connections on tagged VLANs over this single ...
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1 vote
0 answers
269 views

OSPF question from ISP perspective

Was hoping for some advice regarding an OSPF solution for a customer. Basically the customer has about 4 sites. These would all be linked together physically. I have attached a basic network ...
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1 vote
0 answers
202 views

Accessing inside VLANs from DMZ interface on a Cisco ASA

I have set up a test machine on my dmz2 interface. I need to access the inside VLAN configured on the core L3 which has a route from ASA to core L3. Below is the basic configuration on the ASA : ...
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1 vote
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How to configure vlan mapping with VPLS on Cisco 6500 routers?

I'm using VPLS to extend vlan x from site1 (Cisco C6500) to two remotes sites (Cisco C6500) site2 and site3 over MPLS. The issue I'm facing is that a vlan with the same number already exists in the ...
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1 vote
0 answers
140 views

Juniper EX4200 Public Subnet Vlan Routing

We have a Juniper EX4200 which is connected via ge-0/0/0 trunk port to the providers router. We got our own vlan(id 250) and there are two public subnets routed on this vlan. Currently all our serves ...
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1 vote
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233 views

VLAN issue in HP 5406 switch after a power outage

Last week we had a power outage. When power came back, our HP switches came back online but with a problem. A few VLANs in our HP 5406 switches did not get an IP address from DHCP server, the other ...
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Dell Switch N3048 with PowerConnect 6248

I have two Dell switches and its a classical VLAN Scenario that does not want to work. PowerConnect 6248 is connected to the outside world and from there i like to bring new subnet ( this is already ...
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1 vote
1 answer
1k views

Juniper mirroring trunk ports

I have a virtual chassis of 2 EX4600-40f. The 4 ports (0/0/1, 0/0/2, 0/0/3, 0/0/4) where my ESX are connected are configured in trunk mode with some vlans. I would like to copy the traffic (tagged) of ...
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0 votes
1 answer
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Dell OS10 equivalent of Cisco switchport access

hoping someone knows OS10 command structure :) In the Cisco world, if I want to create an access port and add it to VLAN 50 its simply: switchport mode access switchport access vlan 50 What would the ...
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0 votes
1 answer
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Managed Switch, Setting up VLAN Tagged, Untagged, allowed & tagged only etc

Looking for some help setting up a Dell PowerConnect 2724. 1st time setting one of these up. The best graphic I could find to explain my setup: My router DHCP is enabled so it will provide IP ...
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2 answers
109 views

Question about subinterface DHCP relay CISCO

I want to make 4 PC got DHCP IP address No problem with left side, but right side 2 PC can't get IP automaitic. I think the problem is DHCP Relay. How can I use ip helper-address for subinterface of ...
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How to set the default VLAN on Cisco SG350 switches firmware 2.5.0.83

We've got a site with all its Cisco SG300 network switches configured with a custom default VLAN. Normally, we'd use the following commands to change the default VLAN: vlan database default-vlan vlan ...
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0 votes
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31 views

Cisco 2960 and Cisco 871 - no connectivity on non-default vlans

Unable to get internet connectivity from non-default vlans. Suspect router config is not adequate Five vlans created on 2960 (10,20,30,40,50)and Gig port 0/1 set to trunk. Port f0 on router which is ...
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0 votes
2 answers
52 views

PowerConnect 5500 Series VLAN routing problem

My issue is very similar to this link: Dell PowerConnect 5524 VLAN routing I have several VLANs But most importantly VLAN 1 is the flat 192.168.69.0/24 VLAN 10 is 192.168.0.0/16 VLAN 110 is 10.1.10.0/...
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How do I load VLAN database between switches (CISCO 2960)?

I glad for any help on this topic -- netanel
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0 votes
1 answer
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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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0 votes
1 answer
302 views

Duplicated Vlan ID

I have one flat network with our data center and it is causing as a lot of issues, so i had to design a new network to separate the buildings from the data center, when I designed the new network i ...
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0 votes
1 answer
250 views

Best practice / advice for cisco 3560 behind Virtualised OPNsense

Currently I run the below scheme. The problem is that when ESXi is down it takes down all the network with it, so I have to boot up another router to log in to it. WAN > OPNsense (in ESXi)> ...
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STP configurations

In my design, there will be a few be a few rings of edge switches that are connected to my distribution switch. (alcatel 6860-U28) The distribution switch will then be connected to my core router ( ...
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0 votes
1 answer
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intervlan routing with PfSense

I Need some guidance on getting my lab networking configured. Any support is appreciated. My Lab consists of: 2 cisco switches: 2960s(access layer 2) and 3750X(ip routing/layer 3) Xenserver with ...
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0 votes
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72 views

CMTS (DOCSIS 3.0) with CGN (CGNat)

For a new project/building I am working with the CMTS model MA5633-XB10 by Huawei. The usual way is done by implementing two DHCP servers in the same VLAN, from which the CPE gets the private IP ...
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319 views

Vlan Routing with ESXI and L3 Cisco Switch

Please, i need your help. I have read all the posts from the internet, but i don't know what is wrong. i want to ping from PC10 (portgroup in Vlan 10 with ip 1.1.10.200, GW 1.1.10.2) to the int vlan ...
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  • 1
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2 answers
299 views

Cisco router on a stick with public ip wan (ISP)gateway

I am trying to create a router on a stick with an outside facing sub-interface with a public IP from an ISP. I have tried to configure NAT and routing but I just cant get to ping the internet. I'm ...
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0 votes
0 answers
56 views

How to allow traffic through vlan

I have router connected directly to Antenna from G0/4 and when connected PC to G0/1 the internet working normally as Fig. 1 in below Photo. I need to change the router place so i create vlan 500 in ...
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144 views

Cannot create connection between two routers in same VLAN via switch

I currently have a Cisco 2960-24TT switch (switch1) and a Cisco 1841 router (router1) that form part of my core network connecting other VLANs and devices. The two ports on router1 have been ...
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  • 280
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41 views

LAG and VLAN Problems

I have an extended star network between two buildings. In each building I have a "Main" switch. The two Dell N1524 switches are connected via 4 fibre optic links over SFP+. Now the 4 links are ...
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