associate-vrf command in interface nve1. The following commands are automatically configured unless one or more are entered as overrides. Use the show forwarding internal trace nve-peer-history command to display the time stamp of each NVE peer installed. When you have IBGP session between BGWs and EBGP fabric is used, you need to configure the route-map to make VIP or VIP_R The documentation set for this product strives to use bias-free language. route-target Address-family IPv4 EVPN for VXLAN host-based routing. In this blog, we'll look closely at VXLAN EVPN Downstream VNI for intra-site and inter-site (Inter-VNI communication using Downstream VNI). Configure the route target (RT) for import and export of IPv4 or IPv6 prefixes. values. map-name. VXLAN EVPN with downstream VNI has the following guidelines and limitations: Cisco Nexus 9332C, 9364C, 9300-EX, and 9300-FX/FX2/FXP platform switches and Cisco Nexus 9500 platform switches with -EX/FX You can configure EVPN over segment routing or MPLS. commands are automatically configured unless one or more are entered as overrides. for Cisco Nexus 9300-FX3 and 9300-GX platform switch. {L2 | L3}. Step 3 to step 6 are optional for configuring the VRF for VXLAN Routing and are only necessary in case of a custom route distinguisher Bind the NVE source-interface to a dedicated loopback interface and do not share this loopback with any function or peerings You can configure the label allocation Layer3 macst group is only used for Tenant Routed Multicast (TRM). This defines BGP as the mechanism for host reachability advertisement, global mcast-group the asymmetric VNIs at the border gateways. tcam-size mcast-group in the path between two endpoints by dynamically determining the lowest MTU along the path from the packet's source to its Beginning with Cisco NX-OS Release 10.2(3)F, VXLAN EVPN is supported on Cisco Nexus 9364D-GX2A, and 9348D-GX2A platform switches. is strongly recommended for all VTEPs of a fabric. route-target size A parent interface in default VRF, carrying subinterfaces with VRF and dot1q tags, is supported as VXLAN uplink. The export of VRF prefixes can be done by static or auto derived route-target configuration. When you have IBGP session between BGWs and EBGP fabric is used, you need to configure the route-map to make VIP or VIP_R AS_TRANS, as described in IETF RFC 6793 section 9 (https://tools.ietf.org/html/rfc6793#section-9). AS_TRANS, as described in IETF RFC 6793 section 9 (https://tools.ietf.org/html/rfc6793#section-9). router bgp VNI. For the Cisco Nexus 9504 and 9508 with R-series line cards, VXLAN EVPN (Layer 2 and Layer 3) is only supported with the 9636C-RX Disables the global mode for all VXLAN bridge domains, (Optional) Beginning with Cisco NX-OS Release 9.2(1), auto derived Route-Target for 4-byte ASN is supported. Default time-interval is 180 seconds. show ip route detail vrf With the ASN demand of 4-byte length and the VNI requiring 24-bit (3-bytes), the Sub-Field number, router-id belonging to that interface and will relearn on traffic. rd auto Configure distributed gateway virtual MAC address. For successful downgrade from Cisco NX-OS Release 9.3(5) to a prior release, ensure that the asymmetric VNI configuration Configure this parameter on the spine for eBGP when all leafs This enables sending and receiving BUM traffic for the VNI and override the global configuration. Virtual eXtensible Local Area Network (VXLAN) is a tunneling protocol that tunnels Ethernet (layer 2) traffic over an IP (layer 3) network. duplication still exists (an effort to prevent an increment of the sequence bit). {L2 | L3}. Configure address family Layer 2 VPN EVPN under the BGP neighbor. You can choose either of the following two procedures for creating the NVE interface. For more information, see the Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 9.3(x). NVE and other Layer 3 protocols using the same loopback is not supported. The following are example commands to help the configuration of the number of VM moves in a specific time interval (seconds) vrf-name, vni In the following figure, DC-1 and DC-2 are asymmetric sites, and DC-3 is a symmetric site. The NVE source-interface loopback is required to be present in the default VRF. number. Mobility Sequence number of a locally originated type-2 route (MAC/MAC-IP) can be mismatched between vPC peers, with one avoids the need for any multicast configurations that might have been required for configuring the underlay. GRE TX path (encapsulation) is not supported. IETF RFC 4364 section 4.2 describes the Route Distinguisher format and IETF RFC 4364 section 4.3.1 refers that it is desirable The VTEP and the SVI for this VLAN have to be properly configured for the distributed Anycast Gateway operation, for Bind the NVE source-interface to a dedicated loopback interface and do not share this loopback with any function or peerings Under each neighbor define L2VPN EVPN. 9.3(5) or later. show ip route detail vrf The range is 2 to 36000 seconds; default is 180 seconds. ND ISSU is supported for new L3VNI future releases. Route-Target is constructed with the Autonomous System Number (ASN) as the 2-byte administrative filed and the Service Identifier this applies for the inner traffic coming from network (VXLAN) towards the access (Ethernet). hosts and default refresh time out logic for IPv6 addresses (default is 3 seconds). associate-vrf. Using ingress-replication protocol bgp In earlier releases, the VNI configuration must be consistent An SVI in any VRF remains not supported as VXLAN uplink. RD is constructed with the IP address of the BGP Router ID as the 4-byte administrative field (RID) and the internal VRF identifier For Multi-AS environments, the Route-Targets must either be statically defined or rewritten to match the ASN portion of the These two vxlan must exchange routes between themselves. Configure to suppress ARP under Layer 2 VNI and overrides the global set default. vrf context traffic failover on one-side NVE shut or one-side loopback shut is not supported. for Cisco Nexus 9300-FX3 and 9300-GX platform switch. The command "clear ip arp vrf force-delete" on specific interface normally deletes entries from ARP A best practice is to use a dedicated loopback address for the VXLAN VTEP function. A sample route-map This not configurable. Displays the VRF associated with an L2VNI. Create the network virtualization endpoint (NVE) interface. number. the number of moves in a given time-interval (seconds). Displays the egress VNI associated with the remote peer. rd auto EVPN-VXLAN is an overlay technology that creates a topology-independent underlay fabric. l2. The DNS server is attached to a shared services VRF, which is attached to an L3VNI. The EBGP peering from the VTEP to the external node can be in the default VRF or in a tenant VRF (external connectivity). Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Downstream VNI is supported for the following underlay constellations: For downstream VNI with Layer-3 VNI, the underlay can be ingress replication or multicast based. The VNI tag is kept inside VXLAN header while the packet is moving in the fabric - this gives you segmentation. timer value to be configured, find the time it took to program the last NVE peer after reload and add buffer time of 100 seconds Show system internal ofm event-history interface vni. route advertisement with higher AS-PATH when local VIP or VIP_R is down (due to reload or fabric link flap). number, vn-segment Instead of a ingress replication, mcast group can be configured. Ingress Replication (IR) feature has been introduced on BGP EVPN over VXLAN to forward Broadcast, Unknown Unicast and Multicast (BUM) traffic to the relevant receipients in a network. list. Define MPBGP neighbors. Under each neighbor define L2VPN EVPN. Traditional layer 2 networks have issues because of three main reasons: Spanning-tree. 9.3(5) or later. It is a best practice to use the physical interfaces for EBGP IPv4/IPv6 peering sessions (underlay). TCAM size. Assigns a route map for IPv4 or IPv6 policy-based routing to L3VNI interface. vTEP having a sequence number K while other vTEP in the same complex can have the same route with sequence number 0. Beginning with Cisco NX-OS Release 10.3(1), vPC cloudsec with DSVNI is not supported on Cisco Nexus 9000 Series switches. Performing no feature nv overlay with the new L3VNI configuration removes all vrf-vni-l3 config under VRF and cleanup the PBR/NAT configuration, if present. Tenant Routed Multicast VXLAN to MPLS (LDP) Gateway is supported on the Cisco Nexus 3600-R and the Cisco Nexus 9500 with R-Series line cards. Enables globally (for all VNI) the VTEP to exchange local and remote VTEP IP addresses on the VNI in order to create the ingress You can configure additional L3VNIs with the new keyword L3 without VLAN association. VNI. is strongly recommended for all VTEPs of a fabric. l2vpn Specifying the auto option is applicable only for IBGP. In the following figure, Tenant VRF A in Leaf-1 can communicate with Tenant VRF A in Leaf-2. The Cisco Nexus 9200 platform switches with Application Spine Engine (ASE2) have throughput constrains for packet sizes of Binds the NVE source-interface to a dedicated loopback interface. The RT is used for a per-VRF prefix import/export Exception is ND-ISSU support During the vPC Border Gateway boot up process the NVE source loopback interface undergoes the hold down timer twice instead member vni has been removed. export The shut/no shut command is not allowed on interface vni. and evi [bgp | local | static | vxlan | arp]]. configuring the underlay. See the Cisco Nexus 9000 Series NX-OS Security Configuration Guide, Release 9.3(x) for other guidelines and limitations for the VXLAN ACL feature. With the ASN demand of 4-byte length and the VNI requiring 24-bit (3-bytes), the Sub-Field Enable VXLAN with distributed anycast-gateway using BGP EVPN. To display the VXLAN EVPN with downstream VNI configuration information, enter one of the following commands: show bgp evi interface configuration is provided below. Two types of VNI's are used which is one for L2 operations and one for L3 operations. Not using unique route distinguishers across all border nodes is not supported. The following conditions must be met to leverage Downstream Decoupling the underlay from the overlay creates a network with multitenancy, redundancy, and host mobility across a vendor-agnostic ecosystem. vTEP having a sequence number K while other vTEP in the same complex can have the same route with sequence number 0. are using the same AS but the spines have a different AS than leafs. Specify the Service Instance (VNI) for the EVI. VXLAN is not supported on N9K-C92348GC-X switches. Downstream VNI is configured based on route-target export and import. 24 hours (this means 5 moves in 180 seconds for 5 times) before the switch permanently locks or freezes the duplicate entry. and Default time-interval is 180 seconds. The configuration of only auto derived route-targets will not result in downstream VNI. The default is 5 moves in 180 seconds. does not cause any functional impact and the traffic is not impacted even after the host moves. VRF must be configured. Step 3 to Step 6 are optional for configuring the VLAN for VXLAN VNI and are only necessary in case of a custom route distinguisher or route-target requirement (not using auto derivation). Configure to suppress ARP globally for all Layer 2 VNI.within the NVE interface. If you enter an RT, the following formats are supported: ASN2:NN, ASN4:NN, or IPV4:NN. The Cisco Nexus 9000 QoS buffer-boost feature is not applicable for VXLAN traffic. Changing the System Routing Mode requires a reload of the switch. It does so by importing multiple L3VRFs into a single local The number of host moves allowed in n seconds. To display the VXLAN EVPN with downstream VNI configuration information, enter one of the following commands: show bgp evi VNI 30001 on VTEP1 can perform asymmetric VNI with VNI 30002 on VTEP2 and VNI 30003 on VTEP3. The use of unique route distinguishers Example auto derived Route-Target (RT) with 4-byte ASN (AS_TRANS): IP-VRF within ASN 65656 and L3VNI 50001 - Route-Target 23456:50001, MAC-VRF within ASN 65656 and L2VNI 30001 - Route-Target 23456:30001. Wherever a MAC address is permanently frozen, a syslog message with written by L2RIB. vlan-number, vrf member address BGP peering between asymmetric VNI is supported if the VNIs are in a 1:1 relationship. The Type 1 encoding allows a 4-byte administrative field and a 2-byte numbering field. To disable advertisement for a VRF toward the EVPN, disable the VNI in NVE by entering the no member vni 2023 Cisco and/or its affiliates. interface It is a best practice to use the physical interfaces for EBGP IPv4/IPv6 peering sessions (underlay). vrf-name. In our prior blog Cisco NX-OS VXLAN Innovations Part 1: Inter-VNI Communication Using Downstream VNI we covered about VXLAN EVPN DSVNI. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. administrative field and the Service Identifier (VNI) for the 4-byte numbering field. Create overlay VRF VLAN and configure vn-segment. vrf command: The following example shows sample output for the show ip route detail vrf Configure the IPv4 or IPv6 unicast address family. VNI 50001 on VTEP1 can perform asymmetric VNI with VNI 50002 and VNI5003 on VTEP2 at the same time. Cisco Nexus 9200 and 9300-EX/FX/FX2/FX3 and -GX support 1G, 10G, 25G, 40G, 100G and 400G for VXLAN uplinks. for duplicate IP-detection: To detect duplicate host addresses in n seconds. To display the VXLAN BGP EVPN configuration information, enter one of the following commands: show ip arp suppression-cache [detail | summary | vlan double-wide. nve-interface. route-target auto The no interface vni removes the PBR/NAT config first and then remove the interface vni. Configure BGP underlay for the IPv4 unicast address family. Step 3 to step 6 are optional for configuring the VRF for VXLAN Routing and are only necessary in case of a custom route distinguisher The vni is the VNI associated with that particular VRF. address. VACLs are not supported on VXLAN de-capsulated traffic in egress direction; The value of the delay timer on NVE interface must be configured to a value that is less than the multi-site delay-restore vrf. destination. (Default number of moves is 5 moves. You can choose to migrate the existing L3VNI config one by one to the new L3VNI without VLAN association. are using the same AS but the spines have a different AS than leafs. nve-interface. number The Type 0 encoding allows a 2-byte administrative field and a 4-byte numbering field. The vni is the VNI associated with that particular VRF. ARP suppression is only supported for a VNI if the VTEP hosts the First-Hop Gateway (Distributed Anycast Gateway) for this VNI 50001 on VTEP1 can perform asymmetric VNI with VNI 50002 on VTEP2 and VNI 50003 on VTEP3. VNI 50001 (on VTEP1) can peer with a loopback in VNI 50002 (on VTEP2 and VTEP3). See the Cisco Nexus 9000 Series NX-OS Label Switching Configuration Guide, Release 9.3(x) for more information. , if host appears simultaneously under two VTEPs. Manually configured route targets are required for EBGP and for asymmetric VNIs. commands are automatically configured unless one or more are entered as overrides. After the 5th move within 180 seconds, the switch starts a 30 second lock (hold down timer) before checking to see if the vrf. Displays the egress VNI or downstream VNI for each next-hop. DHCP snooping (Dynamic Host Configuration Protocol snooping) is not supported on VXLAN VLANs. This is a day-1 and expected behavior. Beginning with Cisco NX-OS Release 10.2(3)F, VXLAN to MPLS-SR Gateway is supported on the Cisco Nexus 9300-GX2 platform switches. Cisco Nexus Series 9500 Series switches (7.0(3)I2(1) and later). See the Cisco Nexus 9000 Series NX-OS Security Configuration Guide, Release 9.3(x) for other guidelines and limitations for the VXLAN ACL feature. Only EBGP peering between a VTEP and external nodes (Edge Router, Core Router or VNF) is supported. interface RD is constructed with the IP address of the BGP Router ID as the 4-byte administrative field (RID) and the internal VRF identifier Within Cisco NX-OS, the auto-derived FEX host interfaces remain not supported as VXLAN uplink and cannot have VTEPs connected (BUD node). The Type 0 encoding allows a 2-byte administrative field and a 4-byte numbering field. practice (external connectivity). Configure BGP underlay for the IPv4 unicast address family. I configure 2 vxlan on leaf (vpc pair) switch and route leaking point on spine switch. The export of VRF prefixes can be done by static or auto derived route-target configuration. with downstream VNI of Layer-2 VNIs. The default value is 135 seconds. field. You can choose either of the following two command procedures for creating the NVE interfaces. For information on configuring ACL TCAM regions, see the Configuring IP ACLs chapter of the Cisco Nexus 9000 Series NX-OS Security Configuration Guide. The following are example commands to help the configuration of the number of VM moves in a specific time interval (seconds) The RT is used for a per-MAC-VRF prefix import/export policy. For successful downgrade from Cisco NX-OS Release 9.3(5) to a prior release, ensure that the asymmetric VNI configuration VLAN logical port VP count is 10*10 = 100. show l2route evpn mac [all | evi Only EBGP peering between a VTEP and external nodes (Edge Router, Core Router or VNF) is supported. Cisco Nexus 9516 platform is not supported for VXLAN EVPN. vrf-name, vni VNI: Downstream VNI requires the usage of different VRF (MAC-VRF or IP-VRF), each VRF must have a different VNI (Asymmetric VNI). Cisco NX-OS Release 9.3(5) introduces VXLAN EVPN with downstream VNI. The auto-derived Route-Target (route-target import/export/both auto) is based on the Type 0 encoding format as described in If one of the next hops is a VXLAN next hop and the other next hop is local reachable via FIB/AM/Hmm, the local next hop reachable A subinterface in any VRF and/or with dot1q tag remains not supported as VXLAN uplink. commands are automatically configured unless one or more are entered as overrides. cant peer with a loopback in VNI 50002 (VTEP2) and VNI 50003 (VTEP3) at the same time. example, global Anycast Gateway MAC address configured and Anycast Gateway feature with the virtual IP address on the SVI. However, Tenant VRF A requires VXLAN EVPN with downstream VNI is currently not supported with the following feature combinations: Seamless integration of EVPN with L3VPN (MPLS SR). Gateway functionality for VXLAN to MPLS (LDP), VXLAN to MPLS-SR (Segment Routing) and VXLAN to SRv6 can be operated on the