Arista EOS Central - Tag

Support BGP PIC edge for EVPN VXLAN routes for remote VTEP failures

Posted on February 22, 2021 by Matthew Carrington-Fair | 92 Views

Description Prior to 4.25.2F, support for BGP PIC was restricted to locally identifiable failures such as link failures. If a remote VTEP went down, this would require action by the IGP and BGP to recompute a new best path traffic destined to affected BGP prefixes originally reachable by the problematic VTEP. This feature introduces support for RFC8971 (BFD for VXLAN) for EVPN learned VTEPs to improve convergence times in these scenarios by tying the liveness detection provided by the BFD sessions into existing BGP PIC support for software fast-failover. Without this feature, until the underlay route providing reachability to the...
Continue reading →

Arista Fabric Integration with Microsoft Network Load Balancing

Posted on January 21, 2021 by Deepan Jayaraj | 334 Views

Overview This article provides a brief introduction and configuration of Microsoft NLB with Arista L2LS (without VxLAN) and L3LS VxLAN fabric setup to avoid the most common issues during the deployments. NLB Introduction The Network Load Balancing (NLB) feature distributes traffic across several servers by using the TCP/IP networking protocol. By combining two or more computers that are running applications into a single virtual cluster, NLB provides reliability and performance for web servers and other mission-critical servers. Three modes of operation in NLB Unicast All the NICs assigned to a Microsoft NLB cluster share a common MAC address. The MAC...
Continue reading →

VxLAN VTEP counters on 7020R, 7280R, 7280R2, 7280R3, 7500R, 7500R2, and 7500R3 series

Posted on December 18, 2020 by Bin Wang | 89 Views

Description The VxLAN VTEP counters feature allows the device to count VxLAN packets received and sent by the device on a per VTEP 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 “decap” counters count packets coming from the core, decapsulated on the device and heading towards the edge. To be able to count VxLAN packets the device has to...
Continue reading →

Multiple VXLAN to interface

Posted on December 15, 2020 by saverio giuntini | 0 Views

Hello, I’m testing vEOS with basic flood-and-learn VXLAN topology. Is it possible to assign multiple VXLAN to a single interface? i.e. int Et1: untagged frames are mapped to VNI xxxx tagged frames (vlan 123) are mapped to VNI yyyy tagged frames (vlan 456) are mapped to VNI zzzz so that on the linux end host, the configuration will be something like: eth0: public_ip/32 gw: virtual_gw Vlan.123: private_subnet Vlan.456: private_subnet

Still warning in vxlan config-sanity

Posted on December 14, 2020 by robma Bayu | 0 Views

Hi All I deploy vxlan that controlled by CVX. However there some warning in config-sanity. below are the output text from “show vxlan config-sanity” Local VTEP Configuration Check WARN VLAN-VNI Map WARN VLAN 915 does not exist VLAN-VNI Map WARN VLAN 916 does not exist VLAN-VNI Map WARN VLAN 920 does not exist Flood List WARN No remote VTEP in VLAN 920 Flood List WARN No remote VTEP in VLAN 915 Flood List WARN No remote VTEP in VLAN 916 Routing WARN Virtual VTEP IP is not configured CVX Configuration Check FAIL CVX Server FAIL No route to 10.9.99.101 MLAG...
Continue reading →

Head-End-Replicated DHCP Packets Suppression in VXLAN Network

Posted on December 9, 2020 by Saurav Arora | 200 Views

Description In VXLAN networks, broadcast DHCP requests are head-end-replicated to all VXLAN tunnel endpoints (VTEP). If a DHCP relay helper address is configured on more than one VTEP, each such VTEP relays the DHCP request to the configured DHCP server. This could potentially overwhelm the DHCP server as it would receive multiple copies of broadcast packets originated from a host connected to one of the VTEPs. In Figure 1, a DHCP request from DHCP Client1 is head-end-replicated to all VTEPs. DHCP Relay on VTEPs B and C will also forward this request to the DHCP server, resulting in three copies...
Continue reading →

vxlan configuration

Posted on December 4, 2020 by daehan we | 0 Views

Hi there I made vEOS lab for bgp evpn switchs and i got some error when i made vxlan interface configuration .. i add static vlan vni mapping on that interface like this ! interface Vxlan1 vxlan source-interface Loopback1 vxlan controller-client import vlan none vxlan udp-port 4789 vxlan vlan 1000-2000 vni 1000-2000 ! it works.. then i want to extend of range for more vlan useage i changed like this ! interface Vxlan1 vxlan source-interface Loopback1 vxlan controller-client import vlan none vxlan udp-port 4789 vxlan vlan 11-3200 vni 11-3200 ! Then.. Ethernet interface wont up state it told notconnect...
Continue reading →

EVPN L3 Gateway

Posted on October 28, 2020 by Jeffrey Nelson | 722 Views

Description This feature adds control plane support for inter-subnet forwarding between EVPN networks. This support is achieved by advertising received EVPN IP Prefix routes (Type-5) with next-hop self. VXLAN and MPLS encapsulation are supported, and the encapsulation type used for advertised routes is dependent on the encapsulation type configured for EVPN peering. The following diagram shows an example topology where an EVPN VXLAN network exchanges Type-5 routes with an EVPN MPLS network. Within the EVPN VXLAN and EVPN MPLS network, EVPN routes are exchanged as normal. The L3 gateway functionality is achieved by GW1/2 and GW3/4 advertising received type-5...
Continue reading →

EVPN VXLAN single-gateway centralized routing

Posted on October 28, 2020 by Aaron Bamberger | 476 Views

Description In a traditional EVPN VXLAN centralized anycast gateway deployment, multiple L3 VTEPs serve the role of the centralized anycast gateway. In order for hosts to have a consistent ARP binding for any of the individual centralized gateway VTEPs, each VTEP operating as a centralized gateway is configured with a virtual router MAC (VARP MAC), and a virtual VTEP IP (VARP VTEP IP), that is shared between all of the L3 VTEPs operating as centralized gateways. Each centralized gateway VTEP also advertises an EVPN type-3 route for both its primary VTEP IP and VARP VTEP IP, so both IPs end...
Continue reading →

Mss fortigate, cvx, cvp and Arista L3LS

Posted on September 25, 2020 by robma Bayu | 0 Views

Hi master. My customer has infrastructure Arista 2spine and 4leaf. They want to deploy new firewall Fortigate HA = 2 unit and Cloudvison appliance with MSS features. I’m reading and learn concept mss configuration on cvx and Fortigate, but there is something I’m not understanding about config mss on cvx. Arista Macro Segmentation Service integration with Fortinet Firewalls The link at the top, define command on cvx “type Fortinet fortimanager”My customer asks for me, how about not used /without the fortimanager? It is can used mss features, configuration or not? Please advise and share your experience and link recommended. Thanks Robma bayu

EVPN VXLAN Support for Wireless APs

Posted on August 24, 2020 by Mitchell Jameson | 175 Views

Description Typical WiFi networks utilize a single, central Wireless LAN Controller (WLC) to act as a gateway between the wireless APs and the wired network. Arista differentiates itself by allowing the wireless network to utilize a distributed set of aggregation switches to connect APs to the wired network. This feature allows a decentralized and distributed set of aggregation switches to bridge wireless traffic on behalf of the set of APs configured to VXLAN tunnel all traffic to those aggregation switches, or their “local” APs. This is an extension of the VXLAN VTEP to VTEP bridging feature (https://eos.arista.com/eos-4-22-1f/vxlan-vtep-to-vtep-bridging/) which supports only...
Continue reading →

EVPN Control Plane Support for MSS

Posted on August 24, 2020 by Arup Raton Roy Roy | 304 Views

Description This feature enables support for Macro Segmentation Service (MSS) to insert security devices into the traffic path for VXLAN networks using an EVPN control plane. With this feature enabled, CVX will continue to monitor the network via NetDB state and will initiate intercept and offload rules. With this feature enabled, MAC and IP reachability information will be learned and distributed in user configured L2 domains via EVPN. There are two options for pairing MSS and EVPN: Option 1: MSS + EVPN asymmetric IRB Option 2: MSS + EVPN symmetric IRB with VXLAN bridging to firewall (see https://eos.arista.com/eos-4-20-1f/evpn-irb-with-vxlan-underlay/ for...
Continue reading →

VxLAN VTEP counters on 7020R, 7280R, 7280R2, 7500R, and 7500R2 series

Posted on August 20, 2020 by Bin Wang | 173 Views

Description The VxLAN VTEP counters feature allows the device to count VxLAN packets received and sent by the device on a per VTEP 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 “decap” counters count packets coming from the core, decapsulated on the device and heading towards the edge. To be able to count VxLAN packets the device has to...
Continue reading →

EVPN route null0

Posted on July 27, 2020 by Duc Le | 0 Views

Hi, I am trying to configure BGP EVPN using route-type 5. I am run into issue that route table show learned route via Null0. However my control plane show the correct prefix is imported to BGP table. #show ip route vrf CORE C 10.24.4.0/23 [0/0] via Vlan2404, directly connected B E 10.27.4.0/27 [20/0] Null0 B E 10.224.4.0/23 [20/0] Null0 #show ip bgp 10.27.4.0/27 vrf CORE BGP routing table information for VRF CORE Router identifier 10.24.5.251, local AS number 65024 BGP routing table entry for 10.27.4.0/27 Paths: 2 available 65002 65000 65001 2.2.2.1 from 1.1.1.101 (192.168.2.0), imported EVPN route, RD 1.1.1.101:50002...
Continue reading →

What is the meaning of this command?

Posted on July 15, 2020 by Richard Loo | 0 Views

In EVPN configuration guide, I read the following command has been used: ip address virtual source-nat vrf A address 10.10.10.10 But I could not find any documentation to explain this command. What is used for? and How to use it? Please give some hint about this command. Thanks.

IPv6 Underlay Support for VXLAN With EVPN Control Plane

Posted on June 21, 2020 by Madhu Sudan | 233 Views

Description Several customers have expressed interest in using IPv6 addresses for VXLAN underlay in their Data Centers (DC). Prior to 4.24.1F, EOS only supported IPv4 addresses for VXLAN underlay, i.e., VTEPs were reachable via IPv4 addresses only. This feature enables a VTEP to send VXLAN Encapsulated packets using IPv6 underlay. The following list describes the capabilities of this feature. The feature is designed for a Greenfield deployment environment, i.e., an environment where all VTEPs communicate using IPv6 underlay only. In such deployments, the VTEPs must be configured with an IPv6 address on the VXLAN source interface. And all VTEP-VTEP VXLAN...
Continue reading →

4-way L2 ECMP support for EVPN VXLAN All-Active Multihoming

Posted on June 10, 2020 by Hyun Chul Chung | 292 Views

Description As of EOS 4.22.0F, EVPN all-active multihoming is supported as a standardized redundancy solution. Redundancy provides not only better fault tolerance but also a way to load balance unicast traffic for better efficiency. The EVPN VXLAN 4-way L2 ECMP feature allows a Customer Edge (CE) to perform Equal Cost Multi-Path (ECMP) unicast VXLAN switching to a remote CE that is multihomed to at most four Provider Edges (PE). This feature overcomes the existing 2-way ECMP limitation by providing up to 4-way ECMP. Platform compatibility Platform Independent. (Subject to any and all platform compatibility limitations listed in EVPN Extension to...
Continue reading →

VXLAN Unresolved ARPs to 172.16.1.1

Posted on June 3, 2020 by Stanislav Tretiakov | 0 Views

We have stand for test VXLAN between different DCs (schema in attachment). All Leafs connected to CVX server on each DC. And each CVX connected between themeslaves via BGP EVPN. For test in each leaf was connect server with linux and configured port on access VLAN100. Next step I configure assotiation VLAN100 and VNI25100. MAC Lerning good work and on both leaf I see mac-addreses. Connection for vxlan configured in GRE tunnel and has good L3 connectevless. But traffic has no on VNI 25100. I tried to debug this problem and discovered: show vxlan config-sanity category result detail ———————————- ——–...
Continue reading →

Scalable VXLAN/EVPN-MS

Posted on May 27, 2020 by Danail Petrov | 0 Views

G’day, I am looking for some guidance as well as real life experience, gotchas, etc (if someone has done something similar it will be great to hear some thoughts). I am working on a design of 50+ DCs, meaning I’ll have 50+ fabrics across the globe. The requirement is to support multi-tenancy across all the sites and the only “relief” here is I only need to support layer3! That being said, I am considering multi-site, multi-pod architecture running route-servers within and between all sites. My current idea is to have three major sites (regions) – US, EMEA & APAC. In...
Continue reading →

RACL on inner IP fields for VXLAN decapsulated packets

Posted on May 4, 2020 by Kaladhar Musunuru | 164 Views

Description This feature introduces the support for ACL configuration on VxLAN decapsulated packets. The configured ACL rules will be applied to the inner packet header after Vxlan header decapsulation. The ingress RACLs for VxLAN decap packets can be configured on SVIs or under Vxlan tunnel interface. Platform Compatibility DCS-7280R/R2 DCS-7500R/R2 Configuration No special configuration needed to enable RACLs on SVIs to match inner header fields for VxLAN decapsulated packets. interface Vlan100 ip address 1.0.5.1/24 ip access-group vxlanAclIpv4CoreToEdge in ! interface Vxlan1 vxlan source-interface Loopback0 vxlan udp-port 4789 vxlan vlan 100 vni 20000 vxlan flood vtep 172.16.1.1 172.16.1.2 172.16.1.3 ! ip...
Continue reading →

Tag : VXLAN