Dell SmartFabric OS10 User Guide Release 10.5.3

Local ARP

Just as in the case of MAC, any ARP learnt from a locally attached host is VLT synced to the peer node. Both VLT nodes advertise identical MAC-IP EVPN routes so that the Spine nodes sees multiple redundant routes and does not withdraw the route even if one of the VLT peers fail.

Remote ARP

Just as in the case of MAC, any ARP for hosts connected to remote VTEPs is not VLT synced to the peer node.

ARP clear

Unlike MAC, ARP clear command executed on one of the VLT nodes is not synced to the VLT peer node. As a result, these ARPs are withdrawn from the remote VTEPs unless the ARP is cleared on both VLT Peers.

Immediately after ARP clears, all ARPs for hosts connected to remote VTEPs is installed back into the data-plane.

VLT events

VLT failure events like link failure node, failure, or VLTi failure have no impact on the ARPs advertised by EVPN routes.

When a VLT node fails and recovers, all remote MAC-IP routes need to be received and processed before the VLT delay-restore time is complete.

Configuration sequence

Create Virtual-network

OS10(config)# virtual-network 10000
OS10(config-vn)# member-interface port-channel 10 vlan-tag 100
OS10(config-vn)# vxlan-vni 10000
OS10(config-vn)# exit
OS10(config)# virtual-network 20000
OS10(config-vn)# member-interface ethernet 1/1/6 untagged
OS10(config-vn)#vxlan-vni 20000
OS10(config-vn)# exit

Create Virtual-network interface

OS10(config)# interface virtual-network10000
OS10(conf-if-vn-10000)# ip vrf forwarding VRF-TENANT-1
OS10(conf-if-vn-10000)# ip address 10.10.10.1/16
OS10(conf-if-vn-10000)# ip virtual-router address 10.10.10.10
OS10(conf-if-vn-10000)# no shutdown
OS10(config)# interface virtual-network20000
OS10(conf-if-vn-20000)# ip vrf forwarding VRF-TENANT-1
OS10(conf-if-vn-20000)# ip address 20.20.20.1/16
OS10(conf-if-vn-10000)# ip virtual-router address 20.20.20.20
OS10(conf-if-vn-20000)# no shutdown
OS10(conf-if-vn-20000)# exit

Create anycast gateway MAC address

OS10(config)# ip virtual-router mac-address 00:00:01:00:00:01

Enable EVPN and EVI

OS10(config)# evpn 
OS10(config-evpn)# evi 10000
OS10(config-evpn-evi-10000)# rd 110.111.170.195:10000
OS10(config-eqpn-evi-10000)# route-target auto both
OS10(config-eqpn-evi-10000)# vni 10000
OS10(config-evpn)# evi 20000
OS10(config-evpn-evi-20000)# rd 110.111.170.195:20000
OS10(config-eqpn-evi-20000)# route-target auto both
OS10(config-eqpn-evi-20000)# vni 20000

Verification

OS10# show evpn evi 10000

EVI : 10000, State : up
  Bridge-Domain       : Virtual-Network 10000, VNI 10000
  Route-Distinguisher : 1:110.111.170.195:10000(auto)
  Route-Targets       : 0:10000:16787216(auto) both
  Inclusive Multicast : 110.111.170.107
  IRB                 : Enabled(VRF: VRF-TENANT-1)

OS10# show evpn evi 20000

EVI : 20000, State : up
  Bridge-Domain       : Virtual-Network 20000, VNI 20000
  Route-Distinguisher : 1:110.111.170.195:20000(auto)
  Route-Targets       : 0:20000:16797216(auto) both
  Inclusive Multicast : 110.111.170.107
  IRB                 : Enabled(VRF: VRF-TENANT-1)
OS10# show evpn vrf VRF-TENANT-1
EVI  	VXLAN-VNI	Virtual-Network
10000  	10000      	10000
20000  	20000		20000


OS10# show evpn mac-ip
Type -(lcl): Local (rmt): remote
EVI         Mac Address       Type   Seq No  Host-IP        Interface/Next-Hops
10000       00:00:0b:0b:0b:0a lcl    0       10.10.10.10    ethernet1/1/6
10000       14:18:77:25:4e:82 rmt    0       10.10.10.11    110.111.170.107