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4 votes

Non VLAN Tagged Traffic Not Going Through Trunk Between Cisco Switches

You set the interface native (untagged) VLAN to VLAN ID 1 and then only allowed VLAN 79 on the Trunk interface so untagged packets (VLAN 1) cannot pass over it. Add VLAN 1 to the allowed VLAN list on ...
FrameHowitzer's user avatar
3 votes

Understanding VLAN Tagging for Network Segmentation

VLAN tagging is a way to label network traffic so switches can identify which Virtual Local Area Network (VLAN) a packet belongs to. It's crucial for network segmentation, improving security, and ...
jhonegresham's user avatar
2 votes
Accepted

Trying to achieve ECHO request reaching destination in other VLAN

It's almost impossible to tell without information such as VLAN and spanning tree status information on each switch, etc. but I would guess from a quick glance that you have problems between the ...
FrameHowitzer's user avatar
2 votes

Trying to achieve ECHO request reaching destination in other VLAN

The VLANs need to be created on the L3 switch. The gateway IP addresses must be configured on the L3 switch, on each VLAN interface/SVI. IP addresses on an L2 switch are for management only - usually ...
Zac67's user avatar
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2 votes
Accepted

ASA5555-X vlans through port channel not working

I got this to work. All I had to do was restart the ASA after which it got the ip from isp dhcp... Then I had to fix the port channel config on the untagged lan part after figuring out that I need to ...
The amateur programmer's user avatar
2 votes

VTP transparent mode Switch does not pass user traffic to and from other VTP Switches

This has nothing to do with VTP. If Switch C only has VLAN 1, it's not going to forward other tagged traffic from one port to another.
Ron Trunk's user avatar
  • 67.7k
2 votes

Access list and interface vlan

I can confirm that the ACL is functioning as expected. Initially, I attempted to ping from the IP address of the Interface VLAN 13 (the gatway of this vlan 13) which means the ping was generated ...
Asma B's user avatar
  • 51
2 votes

Struggling to configure VLAN properly (LANCOM, no internet)

Here are some basic configuration requirements: Each VLAN interface on your router must be in a unique subnet. They can not overlap. The interface address will be the default gateway for devices in ...
Ron Trunk's user avatar
  • 67.7k
2 votes
Accepted

Layer 3 Switch IP Problem on Packet Tracer

You have the same IP addresses on both switches. This is an invalid configuration. Each interface needs a unique IP address. If you need one gateway address for your devices, consider using a First ...
Ron Trunk's user avatar
  • 67.7k
1 vote
Accepted

Cisco 3650 and wifi hotspot

Found what was th issue. I had to put native VLAN to all trunks between switches concerned.
AnthonyS's user avatar
1 vote
Accepted

Why is inter-VLAN communication not working in my network set-up in Cisco Packet Tracer?

First, you must create both VLANs on both switches, not just VLAN 10 on Switch 1 and VLAN 20 on Switch 2, but both VLANs on both switches: vlan 10 name Switch_1_VLAN ! vlan 20 name Switch_2_VLAN ! ...
Ron Maupin's user avatar
  • 99.9k
1 vote

Why is inter-VLAN communication not working in my network set-up in Cisco Packet Tracer?

First checks with VLAN-related problems: Have the VLANs been properly created on all switches? Assigning them without explicitly creating them (VLAN xx↵) doesn't always work. Can each node ping its ...
Zac67's user avatar
  • 85.5k
1 vote
Accepted

VXLAN VNI VLAN mapping

802.1Q or QinQ tag, they don't tunnel. VXLAN tunnels MAC frames over UDP/IP (layer 4) between two endpoints (VTEPs), including a 24-bit VNID VLAN tag. You can usually map QinQ tags to VNIDs. The VTEP ...
Zac67's user avatar
  • 85.5k
1 vote
Accepted

Switch ping to router with trunk port

Your diagram is a bit unclear, but let's try. tagged VLAN 2 SVI=192.168.2.1 =trunk= Secondary IP=192.168.2.254 A secondary address on the router's native interface doesn't work. The router needs to ...
Zac67's user avatar
  • 85.5k
1 vote
Accepted

Configuring multiple public IPs in Cisco 881 to forward private IPs with tags while bandwidth balancing

Is there a way to forward the private IPs with the tag (VLAN 30) to the switch You can use an access port on the switch with VLAN 30 untagged, or a trunk port on the switch with a VLAN subinterface ...
Zac67's user avatar
  • 85.5k
1 vote

Connecting a hub to my switch bypasses RADIUS/802.1X

That (trivial) MITM scenario is a well known weakness of 802.1X. It's also possible to use a simple switch in place of the hub. That weakness needs to be addressed on the authenticating switch. You ...
Zac67's user avatar
  • 85.5k
1 vote

Understanding VLAN Tagging for Network Segmentation

VLANs logically divide switches into separate, unconnected switches. Frames in one VLAN cannot be sent to an interface for a different VLAN. In order to connect to a device that communicates with ...
Ron Maupin's user avatar
  • 99.9k
1 vote

what's the difference between tag-based and Port-based VLAN and which one is better?

Using VLANs, you can split or partition a physical switch into multiple, logical ones - each VLAN represents its own, closed broadcast domain and switching/bridging is only performed within that VLAN. ...
Zac67's user avatar
  • 85.5k
1 vote

what's the difference between tag-based and Port-based VLAN and which one is better?

In this context the tag-based VLANs appear to be the standard implementation of the VLANs which conforms to the IEEE 802.1Q standard whereby traffic can be segregated to multiple virtual broadcast ...
VL-80's user avatar
  • 113

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