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.

Filter by
Sorted by
Tagged with
0
votes
0answers
12 views

Error: unknown connection [closed]

I am trying to add a secondary IP to an active network enps0 but when I sudo nmcli con mod enp9s0 +ipv4.address "184.67.98.42/24" I get Error: unknown connection 'enp9s0'. I am on CentOS7 ...
2
votes
2answers
41 views

VLAN enumeration best practice [closed]

I was looking into VLANs recently and noticed that in several tutorials, VLAN tags with large numeric gaps were chosen, like 10, 20, 30, etc. Is there a reason why one wouldn't simply enumerate it ...
0
votes
2answers
59 views

Switch with VLAN: How to map between VLANs networks

Assume the following network layout +--------+ ----------------------------------------| Switch |----------------- | ------------------------+-----...
4
votes
1answer
144 views

Correct ACL rules to isolate WiFi traffic from other VLANs?

I have written ACL rules written for a Dell PowerConnect 8024F (which, for the most part, uses the Cisco ACL "language") to isolate WiFi traffic from the rest of the network but allow the ...
0
votes
1answer
37 views

How to force routing to https website without the IP

I am attempting to limit a group of Chromebooks to access one particular site for student testing. The issue is that the website is secure but the ssl cert is attached to the url not the ip. The ip of ...
0
votes
1answer
50 views

Configure dhcp relay agent and router on stick

I need help. I don't know what i did wrong because i have configured the dhcp pool, subinterfaces and dhcp relay agent. Gateway pc uses static ip address while Branch pc acquired their ip address ...
-1
votes
2answers
61 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 ...
1
vote
2answers
37 views

Can anyone please explain L3 SVI configuration ,What is SVI and Where do we use it?

I am learning about switching and came across SVI in vlans ,I Googled and watched couple videos and got really confusing Firsly where do we use Svi? and why do we use it,How to configure svi and what ...
0
votes
0answers
25 views

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

I glad for any help on this topic -- netanel
8
votes
1answer
853 views

What was the intended use for VLANs 1002, 1003, 1004, 1005? (fddi trcrf fddinet trbrf)

The output of show vlan brief includes VLANs 1002 - 1005: 1002 fddi-default active 1003 trcrf-default active 1004 fddinet-default active ...
1
vote
1answer
76 views

Layer 2 (switch) QoS in a LAN or VLAN-based QoS

In my setup above (Cisco 2960 running IOS15), I have all devices marked in red in vlan 20 (WLAN_VLAN), devices in green in VLAN 10 (PC_VLAN) and devices in yellow which are VoIP in the voice vlan. I ...
1
vote
0answers
33 views

VLAN for VoIP alone [closed]

In the topology above, I want to create a single VLAN which houses the router and the VoIP phones alone. All other devices should be excluded from this VLAN. I don’t want to use voice VLAN, just ...
1
vote
0answers
16 views

Can VLANs be used to prevent vertical communication or is there a better option? [closed]

I've been testing a switch with VLAN features. I have nothing configured on the router for VLANs because it does not support it. I got it set up and was testing isolation between endpoints using ping. ...
2
votes
4answers
220 views

How to add two VLANs for DHCP Pool

Currently one of my customer has DHCP pool created in Cisco Switch and ip address range is 192.168.25.0/24 (This is a VLAN). Now they have 230 devices and They are going to increase device count by ...
0
votes
0answers
7 views

bad mask for ip adrress error [duplicate]

I'm not too clear on subnetting rules and experienced an error when I tried to assign 192.168.0.7/29 to an interface on my Cisco router. Can someone please explain why it was not allowing me to assign ...
1
vote
0answers
26 views

ACL dont work - MASTER VLAN to see ALL OTHERS BUT NOT VICE VERSA [closed]

I am having a bunch of VLANS that are in our HQ. Idea is that only several subnet must see IT department VLAN and all others DONT but IT department must see all vlans. I tried like this, to make all ...
1
vote
2answers
78 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 ...
1
vote
1answer
21 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 ...
1
vote
1answer
26 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 ...
0
votes
1answer
23 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
1answer
52 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 ...
1
vote
1answer
69 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 ...
0
votes
3answers
102 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 ...
0
votes
1answer
60 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 ...
0
votes
1answer
30 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.
1
vote
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....
0
votes
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 ...
0
votes
0answers
34 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 ...
0
votes
1answer
52 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 ...
1
vote
1answer
74 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 ...
1
vote
1answer
57 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 ...
1
vote
0answers
15 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 ...
1
vote
0answers
18 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 ...
0
votes
2answers
115 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 ...
1
vote
1answer
46 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 ...
1
vote
1answer
22 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: ...
5
votes
1answer
33 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 .
1
vote
1answer
118 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 ...
2
votes
2answers
27 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 ...
0
votes
2answers
142 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 ...
0
votes
1answer
136 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 ...
0
votes
1answer
109 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 ...
0
votes
1answer
33 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 ...
0
votes
1answer
61 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 ...
2
votes
1answer
239 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 ...
0
votes
2answers
93 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 ...
1
vote
0answers
20 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 ...
0
votes
1answer
235 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 ...
0
votes
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)>>>>>>>>>>>>&...
1
vote
2answers
86 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 ...

1
2 3 4 5
23