Questions tagged [vxlan]

For questions about Virtual Extensible LAN (VXLAN), where it is a proposed encapsulation protocol for running an overlay network on an existing Layer 3 infrastructure. For instance, a VM needs to be deployed in a specific layer 2 broadcast domain segment of the network and you need to configure VXLAN to do so.

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

Juniper MX: how to populate VRF RIB with EVPN Type 2 MAC+IP routes

I have a Juniper MX router at the edge of EVPN/VXLAN domain. Let's suppose that MX performs routing only, no any kind of switching/bridging instances on it. I want to exchange EVPN VRF routes (type5 ...
2
votes
1answer
51 views

Juniper QFX5110 - EVPN-VXLAN ethernet switching table is empty as soon as I enable VXLAN

I am trying to replace our existing Virtual Chassis way of doing mutli-chassis LAG with EVPN multi-homing using VXLAN. My understanding is we should be able to replace any LAG we have with evpn-...
1
vote
1answer
38 views

ip-prefix-routes with vxlan encapsulation on Juniper MX80 / MX104 17.3R3

I want to check whether this configuration is acceptable by MX80 or MX104 Junos 17.3R3 (JTAC recommended version)? Example configuration: set routing-instances VPN100 instance-type vrf set routing-...
0
votes
0answers
51 views

Untagged VLAN in EVPN+VxLAN

I am dealing with very strange issue but wanted to check with experts if i am doing anything stupid or not. I have small size EVPN+VxLAN clos network (OSFP+iBGP+Multicast+Arp-suppression (no ...
0
votes
0answers
37 views

How to connect EVPN DC Fabric to MPLS IP VPN Backbone

Let's suppose that we have a common Clos EVPN/VXLAN-based DC fabric with IP gateways on leaves (anycast gateways). Also there is a lot of different IP VRFs inside a fabric where end hosts reside. What ...
0
votes
0answers
47 views

EVPN VxLAN arp suppression TCAM carving

Deploying Clos design network using leaf Cisco Nexus 9396PX and when trying to configure arp-suppression using tcam carving getting this error Free up tcam slice from VACL (default vacl tcam is 512) # ...
0
votes
1answer
84 views

Vxlan with internet access - possible because of high MTU?

So i was wondering, because VXlan requeres a high mtu to work properly (some set it even as high as the max configurable MTU (9000ish)), how would providing internet access for these nodes/servers ...
0
votes
1answer
26 views

Can a leaf (mc-lag switch pair) connect to an uplink (spine : a single switch) using lag (not a route-only-port)?

By 'lag', I mean one port from each mc-lag peer connects to a port each on the uplink switch (consider this a single switch spine). The mc-lag is an active-active forwarding pair for L2 traffic (aruba'...
1
vote
1answer
335 views

How to route traffic via firewall in EVPN + VxLAN

This is what i am trying to design new network, this is just on paper nothing finalized and i am sure it has lots of issue like firewall should be on leaf not border leaf etc. so that is why i am here ...
0
votes
1answer
501 views

Create a VXLAN with MTU = 1500?

I have a cluster of servers interconnected with 10 Gbps fabric interfaces (ens1f0, MTU 1500). I've set up a VXLAN interface across the cluster using default settings (MTU 1450). For reasons of ...
0
votes
1answer
82 views

Does VXLAN always require UDP for encapsulation, cant it just send packet with only IP header as it has VNI?

Does VXLAN always require UDP for encapsulation, cant it just send packet with only IP header? UDP port 4079 may be required for identification, but is there not any other way to identify, like the ...
2
votes
2answers
473 views

Arista VXLan with QinQ

I've got a weird situation. Three doctors offices are merging in two cities and we are planning on merging them into one building in each city. Due to politics and crappy software each office will ...
4
votes
2answers
96 views

Is it correct to assume that ordering of frames at switch level is not important?

My understanding is that if the payload of the frame contains any data that needs to be reassembled, at least for TCP payload, it can be done at the OS level, once all the packets are received and ...
0
votes
0answers
736 views

Creating an overlay network using ASA and VXLAN over IP MPLS

I need to extend an existing VLAN from a branch LAN to DC. As a matter of fact I noticed that Cisco ASA 5500X have VXLAN capabilities. I am relatively new to VXLAN and I need some help to find the ...
4
votes
2answers
625 views

VXLAN / EVPN Types

Looking into EVPN and the route types (type 2 and 5) is my understanding correct. In terms of their placement into the relevant forward tables upon the device. EVPN Route Type 2: MAC/IP Advertisement ...
4
votes
2answers
617 views

EVPN/VXLAN Flood and Learn

With the original VXLAN spec (RFC) there was no control plane. But Flood and Learn was used via either IR or multicast head-end replication. EVPN was then introduced as the control plane. My ...
4
votes
1answer
414 views

Scaling VXLAN tunnels in openvswitch

As we're creating a cluster of tens of KVM host nodes we've chosen openvswitch as our virtual network infrastructure. So we need to make isolated virtual networks between VMs on demand. I've seen ...
1
vote
1answer
98 views

VMWARE NSX Networking

I have configured in a lab logical switch, distributed router, distributed firewall and everything is work fine. But then I thing about real live environment I am a little bit confused about VTEPs ...
4
votes
1answer
183 views

VXLAN with selective VNI underly manipulation

We trying to implement an scenario to provide L2 transport services from POP A to POP B, connected with three different carriers transport links. In the future, we may want to implement POP C and have ...
1
vote
2answers
4k views

Anycast Gateways

Can anyone shed light of anycast gateways. Typically Ive seen each pair of leafs within a fabric configured with MCLAG and a different IP used for the gw address across each pair of leafs. However, ...
1
vote
1answer
13k views

Difference between L2 VPN and L3VPN. How EVPN used with VxLAN and MPLS?

I am new to VPN technology and trying to connect and get the bigger picture after going through lot of online documents. Here are my confusions: Differences between L2 VPN and L3 VPN. It would be ...
1
vote
1answer
132 views

Are there any Virtual Switch concepts besides vLAN, Virtual Switch, Virtual Distributed Switch, and Logical Switch?

While self-studying for a VMware Associate Certificate I'd see the phrase "Logical Switch" pop up from time to time, at first I figured it was a synonym for a virtual switch. Then I ran into a ...
3
votes
2answers
1k views

Can VXLAN solve broadcast storm problem?

For example, we have small DC1 and decide to make another DC2 in 20km far from DC1 and connect these DCs via dark fiber. For VM Mobility we should extend L2 segment between these DC. I know, that is ...
3
votes
1answer
676 views

EVPN/VXLAN RD & RT

I was reading through this example on Juniper's EVPN/VXLAN documentation and I can't understand why I need two different Route-Distinguishers and Route-Targets. The RD & RT in the VRF instance is ...
2
votes
1answer
315 views

VXLAN ingress replication limitations?

I've been trying to search for data on the scaling figures of the various network ASICs with regards to the maximum number of remote VTEPs they can handle when doing ingress-replication (a.k.a. Head-...
12
votes
2answers
10k views

VXLAN vs VLAN over layer 3

I read that one of the benefits of VXLAN over VLAN is that it can spawn across WAN and multiple layer 3 networks by creating overlay layer 2 networks. However AFAIN VLAN can also do the same using ...
3
votes
1answer
790 views

VXLAN on top of EIGRP/I-BGP

for labbing purposes, I have two NX-9000 that's connected to each other via EIGRP. Trying to have one as Spine switch and the other as Leaf switch. No redundancy/HA needed at the moment Could you ...
1
vote
3answers
217 views

VXLAN Protocol introduction

[RFC 7348] about VXLAN in the introduction says: Data centers are often required to host multiple tenants, each with their own isolated network domain. Since it is not economical to realize ...
1
vote
1answer
583 views

Provide L3 gateways in a multi-tenant VXLAN environment with ASR9K and N9K

I'm trying to make a PoC about VXLAN, and I have a design issue. I have one c3750 per client, each 3750 is connected to an N9K with a single fiber (per client). So each N9Ks are connected to multiple ...
1
vote
1answer
541 views

How does VxLAN 24 bit propagates back to Vlan 12 bit after de-encapsulation?

Question is related to Data Center Inter-connectivity. I wanted to inquire about how does 24 bit VxLAN propagates in Data Center Inter Connect. I am familiar with overview of encapsulation in VTEP. ...
4
votes
3answers
276 views

In‐band Network Telemetry (INT)

I have read this about INT and was wondering... where is all the INT data saved? Is it in the packet metadata? and if so, does metadata count as a part of the total packet length? I know metadata isn'...
1
vote
2answers
314 views

How do I determine the IPV6 address added to VXLAN when interface is set to up? [closed]

Setup: Currently working on a machine with Red Hat 7.2 (Red Hat Enterprise Linux Server release 7.2 (Maipo) to be exact.) I have a vxlan interface configured: # ip link add test.123 type vxlan dev ...
4
votes
5answers
3k views

Regarding VxLAN Encapsulation

I am reading up on VxLAN and understand the encapsulation process somewhat as below: Step1: Take your original Ethernet frame. Step2:Put it inside VxLAN encapsulation. Step3:VxLAN should then go ...
5
votes
2answers
5k views

How to encapsulate all VLAN traffic inside VXLAN

As I understand VXLAN, it looks like it should be able to encapsulate and properly route VLAN-tagged traffic. However, in investigating how to actually configure VXLAN on network devices, it looks ...
1
vote
1answer
307 views

Change MTU without infrastructure change

It's very strange issue, on openstack cluster we have VxLAN between network and compute node and its using 1450 MTU (1500-50) because of encap header. Because of it some of my application not working ...
1
vote
0answers
3k views

Tunnelling difference over VXLAN vs NVGRE vs GENEVE [closed]

Any bullet points that are most imp points when it comes differences between these three tunnellings VXLAN/NVGRE/GENEVE in networks. Found some notes here, anything that you may like to add would be ...
2
votes
1answer
405 views

VxLAN - mac table entries in a TOR switch

It is a basic question. Assume 2 physical machines in two different subnets. VxLAN is configured on 2 TOR switches housing these machines in different subnets in different racks. Host A IP: IP-A ...
4
votes
1answer
438 views

L3 leaf-spine architecture and DHCP ip assignment

Background: we are planning to have a L3 leaf spine network with TOR(redundant mlag) and spine switch. Each TOR is on a specific subnet and run bgp with spine. Now, what is the recommendation to run ...
1
vote
1answer
513 views

VxLAN optional outer 802.1Q purpose?

So, I've been checking Google along with the RFC 7348 about VxLAN functionality. I believe I do have a good grasp of what the purpose of the protocol is, what it does and how it does it etc but I fail ...
1
vote
1answer
1k views

setup VXLAN forwarding to multiple destination on Linux [closed]

I can't setup forwarding of all zero (unknown, I assume)/multicast ethernet frames to multiple unicast IPs (virtual tunnel endpoints), although it seems that it should be supported (also mentioned ...
3
votes
1answer
8k views

VXLAN: how receiver knows that the received packet is VXLAN-encapsulated?

I'm trying to understand how a receiver knows that the received packet is a VXLAN-encapsulated. Looking at the VXLAN RFC, I can't see anything specific that defines that the packet contains VXLAN ...
1
vote
2answers
2k views

How vlan and vxlan achieves virtual machine mobility

Could you give an example for both of these mechanisms? I understand what vlan/vxlan is but am really confused when mobility kicks in. A vivid example is more than welcome.