Arista EOS Central - Tag

SSU support for L2 EVPN with VXLAN

Posted on October 14, 2019 by Narendra C R | 18 Views

Description Smart System Upgrade (SSU) aims to minimize traffic loss during a software upgrade. The Smart System Upgrade (SSU) process includes the core functionality of Accelerated Software Upgrade, plus additional optimizations that permit a hitless restart of several features. SSU leverages protocols capable of graceful restart to minimize traffic loss during upgrade. For protocols not capable of graceful restart, SSU generates control plane messages and buffers them in hardware to be slowly released when the control plane is offline. Additionally, under SSU, the forwarding ASIC does not get reset and ports do not flap. Starting EOS 4.22.1F SSU is now...
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EVPN mutlihoming w/ ESI

Posted on September 19, 2019 by Joe Hlasnik | 0 Views

I stumbled upon this archived [post](https://www.reddit.com/r/Arista/comments/azubnz/mlag_or_esi/) while researching EVPN support specifically on the EVPN multihoming side using common ESIs to extend beyond 2 switches in a LAG. Also this is the only post I’ve found mentioning EVPN Multihoming – https://eos.arista.com/arista-layer-2-vtep-evpn-vxlan-route-type-1-support/ but is limited to using mlag only. Does anyone have any information on when there will be support for the EVPN ESI LAGs?

VxLAN VTEP and VNI Counters

Posted on August 28, 2019 by Rohit Maurya Maurya | 91 Views

Description The VxLAN VTEP and VNI counters feature allows the device to count VxLAN packets received and sent by the device on a per VTEP and per VNI basis. Specifically, it enables the device to count bytes and packets that are encapsulated and decapsulated as they are passing through. The counters are logically split up in the two VxLAN directions: “encap” counters count packets coming from the edge, encapsulated on the device and directed to the core, while “decap” counters count packets coming from the core, decapsulated on the device and heading towards the edge. To be able to count...
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“ip address virtual” support for PIM and IGMP

Posted on August 26, 2019 by Satish Somanchi | 90 Views

Description 4.22.1F introduces support for ip address virtual for PIM and IGMP in MLAG and Vxlan. On a VLAN, the same IP address can be configured using ip address virtual on both mlag devices as well as on different VTEPs. Control packets are source NATed by the kernel to a chosen IP address. The source NATing fails for PIM and IGMP. To overcome this, users can configure pim ipv4 local-interface and borrow the IP address to be used on the VLAN. PIM and IGMP bypass the source NATing in the kernel. The interface configuration pim ipv4 local-interface allows PIM and...
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VXLAN VTEP to VTEP Bridging

Posted on August 23, 2019 by Ravi Krishnamurthy | 202 Views

Description The “vxlan bridging vtep-to-vtep” feature allows VXLAN encapsulated packets ingressed at an Arista switch from a remote VTEP to be bridged and tunnelled back to the same or another remote VTEP. In a traditional VXLAN deployment, all VTEPs are connected to each other in a full mesh topology. So, whenever our switch receives a VXLAN packet from a remote VTEP that needs to be bridged, we never send that packet back through a VXLAN tunnel to another remote VTEP. This is done to prevent loops in general VXLAN networks where all remote VTEPs are reachable from one another. In...
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Does 7050SX support L3 vxlan evpn?

Posted on August 7, 2019 by Dennis Du | 0 Views

I am not able to import evpn from bgp vrf configuration on 7050SX, but able to do same on 7280R2. 7050SX-2(config-router-bgp-vrf-backup-tenant)#route-target import ? ASN(asplain):nn or ASN(asdot):nn or IP-address:nn Route Target Do you mind confirm that whether 7050SX support l3 evpn? Thank you!

EVPN VXLAN All-Active Multihoming

Posted on June 17, 2019 by Chris Hydon | 679 Views

Description Ethernet VPN (EVPN) networks normally require some measure of redundancy to reduce or eliminate the impact of outages and maintenance. RFC7432 [1] describes four types of route to be exchanged through EVPN, with a built-in multihoming mechanism for redundancy. Prior to EOS 4.22.0F, MLAG is available as a redundancy option for EVPN with VXLAN, but not multihoming. EVPN multihoming is a multi-vendor standards-based redundancy solution that does not require a dedicated peer link and allows for more flexible configurations than MLAG, supporting peering on a per interface level rather than a per device level. It also supports a mass...
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EVPN VxLAN IPV6 Overlay

Posted on June 14, 2019 by alton | 241 Views

Description Starting with EOS release 4.22.0F, the EVPN VXLAN L3 Gateway using EVPN IRB supports routing traffic from IPV6 host to another IPV6 host on a stretched Vxlan VLAN. This TOI explains the EOS configuration and show commands. Platform compatibility Platform Supporting ND Proxy and ND Suppression DCS-7280R/7280R2 DCS-7050CX3-32S-F DCS-7050SX3-48YC12-F ( Starting in 4.22.1F ) DCS-7050SX3-48YC8 ( Starting in 4.22.1F ) DCS-7050/7050X/7050X2 ( Starting in 4.22.1F ) DCS-7260X/7260X3 ( Starting in 4.22.1F ) DCS-7060X/7060X2 ( Starting in 4.21.1F ) DCS-7250 ( Starting in 4.22.1F ) DCS-7300/DCS-7320 ( Starting in 4.22.1F ) Platform Compatibility (No ND Proxy, No ND Suppression) DCS-7020R...
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VxLAN troubleshooting guide

Posted on May 29, 2019 by Sravya Kala | 734 Views

VxLAN Basic Troubleshooting Guide I. Objective Provide basic/generic troubleshooting steps to customers in case any VxLAN issue is encountered in their network. II. Introduction: Troubleshooting VxLAN involves few steps as mentioned in the upcoming sections of this document. The below referred topology includes VxLAN configurations with server 1,2,3 as the host devices which obtain connectivity over a vxlan tunnel. Troubleshooting steps are bifurcated into routing and bridging to include multiple scenarios possible. III. Topology IV. Generic Configurations to be checked A. On the VTEPS check for the following configurations: #show run sec vxlan interface Vxlan1 vxlan source-interface Loopback1...
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BGP Crashing with VXLAN EVPN

Posted on May 24, 2019 by Aftab Siddiqui | 0 Views

I have a network setup with 6 Arista 7050QX running VXLAN-EVPN. All nodes are doing eBGP. I can establish eBGP sessions and configure EVPN as well but the moment I start sending traffic via VXLAN then BGP stops working saying “BGP agent not running”. I have tried 4.21.5F, 4.21.3F and currently using 4.20.5F but same result. Config looks like this at one end. Router bgp 65001 vlan 101 rd 10.61.0.7:101 route-target both 101:10000002 redistribute learned interface Vxlan1 description VXLAN Interface vxlan source-interface Loopback0 vxlan udp-port 4789 vxlan vlan 100 vni 10000001 vxlan vlan 101 vni 10000002 Arista DCS-7050QX-32-R Hardware version:...
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MAC Address flapping – VXLAN with MLAG

Posted on March 27, 2019 by Aftab Siddiqui | 0 Views

As per the attached diagram, its a VXLAN EVPN setup. Everything was working fine on that side. Both switches in city A and City B have MLAG configured with the TOR Stack switches. After creating MLAG with the TOR Stack switches, all MAC addresses have started flapping. For example MAC address ab-bc-cd is coming from the server connected to TOR Stack switch in City B. On B-SW01 it is learning from Port-channel10 (MLAG) but on B-SW02 it is learning from VX1 interface (vxlan) which is coming from the RR via B-SW01 and then it hands it back to the TOR...
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EVPN MLAG Shared Router MAC

Posted on January 23, 2019 by alton | 311 Views

Description “MLAG Domain Shared Router MAC” is a new mechanism to introduce a new router MAC to be used for MLAG TOR Leaf pairs. The user can have either explicitly configured MAC address of their choice or use the system generated MLAG system-id for this purpose. When the MLAG shared MAC is set as the MLAG system ID value, the new shared MAC has the following properties: Unlike the bridge MAC which is different on each peer, this MLAG Domain shared router MAC has the same exact value on MLAG peers forming the same MLAG domain. This new shared...
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VXLAN Static and EVPN Dual Configuration

Posted on January 17, 2019 by Jeffrey Nelson | 161 Views

Description Configuration of VXLAN overlay using EVPN allows for extension of Layer-2 (L2) or Layer-3 (L3) networks across multiple data centers. VXLAN is configured on Provider Edge (PE) switches to create an overlay network to tunnel customer traffic between networks connected to the PE switches, while EVPN acts as the control plane by advertising reachability amongst the PE switches via EVPN route types 1-5. In some scenarios, one or more of the PE switches facing the customer network may not support EVPN. For example, the PE switch may be a Linux-based software VTEP (VXLAN Tunnel End-Point) running on a server...
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Layer 2 Data Center Interconnect – Reference Designs

Posted on December 27, 2018 by Naveen Kumar Devaraj | 2543 Views

Introduction VxLAN is a popular choice for extending Layer 2 both intra and inter DC using overlays. Arista offers multiple control plane choices for VxLAN: Static HER, CVX and EVPN. In this article, two approaches to designing a L2 DCI over a L3 underlay are discussed. High-level technical details of each design approach is described first, followed by a comparison of the two options along with their typical use cases. Design 1: Multi-domain Overlay In this design, two overlay domains are identified: DC Fabric domain: This is the VxLAN domain within the DC Layer 3 Leaf-Spine Fabric with Leafs acting...
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EVPN VXLAN Design Guide

Posted on August 6, 2018 by Russell Kelly | 5283 Views

A Detailed Overview of the EVPN & VxLAN Protocols, Route Types, Use-Cases and Architectures 1. Introduction This document describes the operation and configuration of BGP EVPN Services over a VXLAN (Virtual eXtensible LAN) overlay on Arista platforms. The focus in this design guide is VxLAN as the protocol for the data-plane encapsulation for the overlay tunnels, and the functionality of the Multiprotocol BGP (MP-BGP) EVPN address-family for control plane signaling in the overlay. MP-BGP EVPN is not only used for advertising MAC addresses, MAC and IP bindings and IP prefixes across the overlay; it provides efficiencies in the way learning...
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Arista Layer 2 VTEP EVPN VxLAN Route Type-1 Support

Posted on August 6, 2018 by Russell Kelly | 983 Views

Arista Layer 2 VTEP EVPN Route Type-1 Support Arista Layer 2 EVPN VTEP Inter-Operation With A/A Multi-homed Third-Party Layer 3 EVPN VXLAN VTEPs Introduction This document will explain the configurations required to support inter-working with EVPN VXLAN A/A multi-homed VTEPs, also known as L2 ECMP in VxLAN EVPN. Currently, EOS uses MLAG is used to achieve Multi-homing in EVPN VxLAN Topologies, with an any-cast VxLAN VTEP configured on the MLAG pair, and as such does not need to support EVPN Multihoming Tx (Type-1 route generation). EOS can however install received Type-1 routes and can...
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Multi-Tenant EVPN VXLAN IRB Configuration & Verification Guide (iBGP Overlay eBGP Underlay)

Posted on August 6, 2018 by Russell Kelly | 1398 Views

Multi-Tenant EVPN VXLAN IRB Configuration & Verification Guide Symmetric and Asymmetric IRB With VLAN Based and VLAN Aware Bundle Services Using an iBGP Overlay and eBGP Underlay Topology Logical Diagrams Tenant-A: Symmetric IRB Tenant-B: Asymmetric IRB Platform Support: https://www.arista.com/en/support/product-documentation/supported-features Topology Overview In the symmetric and asymmetric IRB setups illustrated in the figures above; for tenant-a four subnets are stretched across the two MLAG domains; with two subnets (vlan 10 – 10.10.10.0/24 and vlan 11 – 10.10.11.0/24) configured as a VLAN based service, and two other subnets (vlan 12 – 10.10.12.0/24 and vlan 13 – 10.10.13.0/24) as a vlan-aware...
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Multi-Tenant EVPN VXLAN IRB Configuration & Verification Guide (eBGP Overlay & Underlay)

Posted on August 6, 2018 by Russell Kelly | 1790 Views

Multi-Tenant EVPN VXLAN IRB Configuration & Verification Guide Symmetric and Asymmetric IRB With VLAN Based and VLAN Aware Bundle Services Using an eBGP Overlay and eBGP Underlay Topology Logical Diagrams Tenant-A: Symmetric IRB Tenant-B: Asymmetric IRB Platform Support: https://www.arista.com/en/support/product-documentation/supported-features Topology Overview In the symmetric and asymmetric IRB setups illustrated in the figures above; for tenant-a four subnets are stretched across the two MLAG domains; with two subnets (vlan 10 – 10.10.10.0/24 and vlan 11 – 10.10.11.0/24) configured as a VLAN based service, and two other subnets (vlan 12 – 10.10.12.0/24 and vlan 13 – 10.10.13.0/24) as a vlan-aware...
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L3 EVPN VXLAN Configuration Guide

Posted on August 6, 2018 by Russell Kelly | 2081 Views

L3 EVPN VXLAN Configuration Guide EVPN VXLAN Type-5 Layer 3 VPN (With Dual-Homed Layer 2 and Layer 3 Sites) Overview Ethernet VPN (EVPN) is an extension of the BGP protocol introducing a new address family: L2VPN (address family number 25) / EVPN (subsequent address family number 70). It is used to exchange overlay MAC and IP address reachability information between BGP peers using type-2 routes, but additionally, EVPN supports the exchange of layer 3 IPv4 and IPv6 overlay routes through the extensions described in (type 5 EVPN routes). An IP VRF is used on a VTEP router for...
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How does vxlan traffic flow from outside into the vxlan

Posted on May 23, 2018 by David Martinez | 0 Views

Hi I understand how vxlan direct routing works from the vxlan perspective. The only thing I cannot grasp my head around is how does the traffic flow from ping for 172.10.10.50 from OUTSIDE DATACENTER -> SPINE eBGP-> multiple different LEAF MLAG VXLAN PAIR with different VTEP ex: 172.0.0.200 vtep 1, 172.0.0.201 vtep 2 -> server 172.10.10.50 connected to vtep 1 pair. vARP on all pairs advertising 172.10.10.1 as the default gateway. Once it comes into the spine how does the spine forward traffic to the get to the server ip addresses? Does it go through one of the vtep ip’s...
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Tag : VXLAN