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.
56
questions with no upvoted or accepted answers
6
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. ...
4
votes
0
answers
64
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 ...
- 41
4
votes
0
answers
177
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 ...
- 161
4
votes
0
answers
126
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 ...
- 41
4
votes
0
answers
106
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....
- 96
3
votes
1
answer
44
views
Should I be using point-to-point or broadcast if I plan on using SVI's 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/...
- 33
2
votes
1
answer
354
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 ...
- 21
2
votes
0
answers
399
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 ...
- 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
...
- 21
1
vote
0
answers
64
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 ...
- 461
1
vote
0
answers
38
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 ...
- 11
1
vote
0
answers
347
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
...
- 226
1
vote
0
answers
72
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,...
- 11
1
vote
0
answers
27
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 ...
- 425
1
vote
0
answers
85
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.
...
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1
vote
0
answers
107
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 ...
- 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 ...
- 4,351
1
vote
0
answers
219
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. ...
- 11
1
vote
0
answers
624
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 ...
- 11
1
vote
0
answers
447
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 ...
- 4,351
1
vote
0
answers
849
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
...
- 84
1
vote
0
answers
555
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 ...
1
vote
0
answers
458
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 ...
1
vote
0
answers
293
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 ...
- 21
1
vote
0
answers
64
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 ...
- 1,491
1
vote
0
answers
765
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 ...
- 860
1
vote
0
answers
276
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 ...
1
vote
0
answers
286
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 ...
- 11
1
vote
0
answers
149
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 ...
- 43
1
vote
0
answers
244
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 ...
- 11
1
vote
0
answers
856
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 ...
- 53
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 ...
- 43
0
votes
1
answer
33
views
Cannot enable link. Why?
I have the following setup:
I'm unable to enable Fa0/5. The switch configuration for that port is correct
No configuration has been made on the server side:
Assigning Ip adresses has not solved the ...
- 295
0
votes
1
answer
54
views
QinQ does not work with L2VPN (VSI and MPLS L2VC - Switch Huawei)
Currently, I am trying to configure a network to transport multiple VLANs for a client who has points in different locations (Side A and Side B). My idea was to use QinQ for this. The network topology ...
0
votes
0
answers
58
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 ...
- 135
0
votes
0
answers
29
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 ...
- 1
0
votes
2
answers
102
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 ...
- 101
0
votes
1
answer
532
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 ...
- 1
0
votes
2
answers
241
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 ...
- 1
0
votes
2
answers
319
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 ...
0
votes
0
answers
337
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 ...
- 353
0
votes
0
answers
53
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 ...
- 101
0
votes
2
answers
627
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
...
0
votes
0
answers
108
views
How do I load VLAN database between switches (CISCO 2960)?
I glad for any help on this topic
--
netanel
0
votes
1
answer
119
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 ...
0
votes
1
answer
520
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 ...
- 99
0
votes
2
answers
374
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)> ...
- 1
0
votes
0
answers
49
views
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 ( ...
0
votes
2
answers
3k
views
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 ...
- 1
0
votes
0
answers
89
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 ...
- 1