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.

61 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
7 votes
1 answer
6k views

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. ...
Michael Haynes's user avatar
4 votes
0 answers
74 views

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 ...
Jacky Spar's user avatar
4 votes
0 answers
213 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 ...
ForJ9's user avatar
  • 171
4 votes
0 answers
142 views

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 ...
FixItSteve's user avatar
4 votes
0 answers
113 views

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....
Anthony's user avatar
  • 106
3 votes
1 answer
104 views

Should I be using point-to-point or broadcast if I plan on using SVIs in IS-IS on Juniper?

Apologies in advance if this is super-basic question, still learning ISIS. I'm migrating from Cisco over to Juniper in an environment where all of the switches are running EIGRP, are on a 172.31.255.0/...
user68992's user avatar
3 votes
1 answer
188 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 ...
Jens Ulrich's user avatar
2 votes
1 answer
474 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 ...
Tyah Alwi's user avatar
2 votes
0 answers
425 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 ...
ws6079's user avatar
  • 121
2 votes
0 answers
4k views

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 ...
user2246935's user avatar
1 vote
1 answer
71 views

Can the Cisco SF302-08 switch support IP routing capabilities?

I'm currently working on configuring inter-VLAN routing on a Cisco SF302-08 switch. I've already enabled Layer 3 routing, created the VLANs, assigned them to switchports, and configured the switch ...
mema's user avatar
  • 11
1 vote
0 answers
130 views

Can't Pass 1 VLAN Through Trunk

I have 2 Cisco switches running IOS with VLANS 20,30,40,50. On SWITCH1 I have servers on Ports 1,2&3 on VLAN 30. I also have a laptop on port 5 on the same VLAN 30 and can ping the servers. They ...
JukEboX's user avatar
  • 461
1 vote
0 answers
48 views

Restconf not getting switchport vlan information

I have a couple of catalyst switches which I'm experiencing an interesting issue using APIs not pulling all the information I need. The switches are running IOS-XE 17.6.3, but I have also seen the ...
speirsington's user avatar
1 vote
0 answers
750 views

Nexus 7706 - switchport trunk allowed vlan not working - all VLANs are being allowed

I noticed that my two Nexus 7706 do not limit the trunk VLANs to what switchport trunk allowed vlan is set to. Sample configuration: interface Ethernet1/15 switchport switchport mode trunk ...
Cha0s's user avatar
  • 226
1 vote
0 answers
102 views

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,...
ptabs's user avatar
  • 11
1 vote
0 answers
32 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 ...
Eraseth's user avatar
  • 425
1 vote
0 answers
119 views

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. ...
Justin Lavan's user avatar
1 vote
0 answers
139 views

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 ...
amit177's user avatar
  • 36
1 vote
0 answers
3k views

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 ...
Satish's user avatar
  • 4,369
1 vote
0 answers
248 views

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. ...
Pro-oui's user avatar
  • 11
1 vote
0 answers
718 views

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 ...
zsheppard's user avatar
1 vote
0 answers
478 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 ...
Satish's user avatar
  • 4,369
1 vote
0 answers
927 views

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 ...
AvidPontoon's user avatar
1 vote
0 answers
593 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 ...
Shinomoto Asakura's user avatar
1 vote
0 answers
500 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 ...
Serena Giannotti's user avatar
1 vote
0 answers
321 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 ...
Asem Moqbel's user avatar
1 vote
0 answers
66 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 ...
yoyo_fun's user avatar
  • 1,531
1 vote
0 answers
809 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 ...
Gareth Hastings's user avatar
1 vote
0 answers
287 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 ...
iaskquestions's user avatar
1 vote
1 answer
321 views

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 ...
user20125's user avatar
1 vote
0 answers
257 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 ...
Syed's user avatar
  • 11
1 vote
0 answers
857 views

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 ...
user3523605's user avatar
1 vote
1 answer
2k 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 ...
thom's user avatar
  • 43
0 votes
0 answers
64 views

Quanta LB6M Trunk and Vlan

I have 2 Quanta LB6M and a Juniper EX4200 and need to create vlan and trunk For vlan interface i have this: interface 0/27 vlan pvid 31 vlan participation exclude 1 vlan participation include 31 exit ...
Ertu Kocak's user avatar
0 votes
2 answers
51 views

Migrating SVI for vlans from Catalyst to Nexus

I'm trying to make sure the transition is smooth the mirrored SVI's are already created but not turned on. Do I simply just turn off the SVI's on the pair of old switches and turn it back on the new ...
user1378803's user avatar
0 votes
1 answer
102 views

Mellanox (NVIDIA) SN3700 switch: Cumulus Linux configuration to force traffic path?

I want to stress all ports on a SN3700 switch with iPerf. I want to force the traffic to go through each port, so port 1 to port 2, port 2 to port 3, port 3 to port 4, etc. The switch is running ...
CrystalBryan's user avatar
0 votes
1 answer
75 views

Cannot get my servers on the same broadcast domain as backbone gateway using Aruba switches

My supervisor told me to go to the server room and connect a bunch of servers to the Department network so they are accessible from office PCs. In the server room we have 7 servers, a couple of wall ...
Amjal's user avatar
  • 1
0 votes
1 answer
111 views

Is this the right way to expose VLANs through VPN (VPN server location)?

Starting from the following network topology: Internet --- ISP Cable Router --- Firewall --- Router --- rest of the network / multiple VLANs (port forwarding) | ...
Kraal's user avatar
  • 101
0 votes
0 answers
70 views

IPsec no working properly

I want to set an IPsec between two routers similar to the one in this lab, however the client on router EAST is NATted with the public IP 98.76.65.42 on the local side EAST(config)# access-list 110 ...
nirvana's user avatar
0 votes
0 answers
258 views

Cannot tag an interface for a specific VLAN : % Error: Tagged flag mis-match Te 0/3

I trying to tag an interface for a specific VLAN on a Dell S4810 : S4810#show run int ten 0/3 ! interface TenGigabitEthernet 0/3 no ip address mtu 12000 switchport flowcontrol rx on tx on no ...
SebMa's user avatar
  • 135
0 votes
0 answers
149 views

Use a single FortiSwitch in multiple, segmented networks

Is it possible to use a single switch in multiple, segmented and firewall protected subnets? Looking at the above picture, I have this existing network WITHOUT the two inner firewalls. The switch is ...
Shawn's user avatar
  • 1
0 votes
2 answers
276 views

Connecting L3 and L2 switches with VLAN settings

I have 1 L3 switch with Static ip - 192.168.0.252 Two L2 switches Switch A - 192.168.0.250 Switch B - 192.168.0.251 I have created VLANs in L3 switches with 192.168.1.1 and 192.168.2.2 ips abd set it ...
Arahasya's user avatar
  • 101
0 votes
1 answer
819 views

PFSense: Opt port able to get to my LAN port / internet

I am trying to setup a disruption between 2 networks one that is coming from the LAN port and one with a different SUBNET from the other (OPT) port. My LAN is not getting blocked from the OPT subnet ...
BartMolk's user avatar
0 votes
2 answers
430 views

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 ...
steve's user avatar
  • 1
0 votes
2 answers
512 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 ...
Ordinary Sail's user avatar
0 votes
0 answers
497 views

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 ...
Matty Brown's user avatar
0 votes
0 answers
62 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 ...
user1165694's user avatar
0 votes
2 answers
1k views

Routing between SVI and routed port on router

How can I achieve reachability from vlan terminated on the L3 switch to routed port on the router, FW? F.E int vlan 10,50 are the SVI's on L3 switch vlan 10 - 10.0.10.254 /24 vlan 50 - 10.0.50.254 /24 ...
Rafał Pawłowski's user avatar
0 votes
0 answers
156 views

How do I load VLAN database between switches (CISCO 2960)?

I glad for any help on this topic -- netanel
netanel shteren's user avatar
0 votes
1 answer
167 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 ...
Ben Druitt's user avatar