Prerequisites

In setting up a MPLS EVPN network, certain prerequisites are essential to ensure proper functionality and connectivity.

• Ensure MPLS EVPN Configuration: Confirm that MPLS EVPN and MPLS MH filtering are already enabled in all leaf and root nodes of the network as they are required for MPLS EVPN Multihoming.
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!hardware-profile filter evpn-mpls-mh enable
!
evpn mpls enable
!
evpn mpls multihoming enable
!
qos enable
!
• Define Interfaces and Loopback Addresses: Configure Layer 2 interfaces, like port channel interfaces (e.g., po1), and assign specific system MAC addresses for proper identification and routing. Additionally, assign loopback IP addresses to establish essential points of connectivity. These configurations establish the efficient network routing and communication.
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!
interface po1
 switchport
 load-interval 30
 evpn multi-homed system-mac 0000.4321.1234
!
interface lo
 ip address 8.8.8.8/32 secondary
 ip router isis ISIS-IGP
!
interface xe8
 switchport
!
interface xe26
 channel-group 1 mode active
!
• Configure ISIS and BGP for Dynamic Routing: Enable ISIS to facilitate dynamic routing on all Leaf and Root nodes within the network. Define ISIS router instances to match loopback IP addresses and add network segments to ISIS areas for proper route distribution. Additionally, establish BGP sessions to advertise routes between different nodes. Set up neighbor relationships using loopback IP addresses, ensuring efficient route advertisement and convergence for optimal network performance.
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!
router isis ISIS-IGP
 is-type level-1
 ignore-lsp-errors
 lsp-gen-interval 5
 spf-interval-exp level-1 50 2000
 metric-style wide
 mpls traffic-eng router-id 8.8.8.8
 mpls traffic-eng level-1
 capability cspf
 dynamic-hostname
 fast-reroute terminate-hold-on interval 10000
 fast-reroute per-prefix level-1 proto ipv4 all
 fast-reroute per-prefix remote-lfa level-1 proto ipv4 tunnel mpls-ldp
 bfd all-interfaces
 net 49.0001.0000.0000.0008.00
!
router bgp 65535
 neighbor 9.9.9.9 remote-as 65535
 neighbor 24.24.24.24 remote-as 65535
 neighbor 26.26.26.26 remote-as 65535
 neighbor 29.29.29.29 remote-as 65535
 neighbor 9.9.9.9 update-source lo
 neighbor 9.9.9.9 fall-over bfd
 neighbor 24.24.24.24 update-source lo
 neighbor 24.24.24.24 fall-over bfd
 neighbor 26.26.26.26 update-source lo
 neighbor 26.26.26.26 fall-over bfd
 neighbor 29.29.29.29 update-source lo
 neighbor 29.29.29.29 fall-over bfd
 !
 address-family l2vpn evpn
 neighbor 9.9.9.9 activate
 neighbor 24.24.24.24 activate
 neighbor 26.26.26.26 activate
 neighbor 29.29.29.29 activate
 exit-address-family
 !
 exit
!
• Configure LDP and RSVP for Efficient Network Operation: Enable Label Distribution Protocol (LDP) and Resource Reservation Protocol (RSVP) on all Leaf and Root nodes to optimize traffic routing and quality of service. LDP assigns labels for packet forwarding, while RSVP reserves network resources along specified paths to enhance network performance and reliability.
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!
router ldp
 router-id 8.8.8.8
 fast-reroute
 graceful-restart full
 graceful-restart timers neighbor-liveness 120
 graceful-restart timers max-recovery 120
 session-protection duration 10
 targeted-peer ipv4 9.9.9.9
  exit-targeted-peer-mode
 targeted-peer ipv4 24.24.24.24
  exit-targeted-peer-mode
 transport-address ipv4 8.8.8.8
!
router rsvp
!
rsvp-path LEAF1-ROOT2 mpls
 24.1.4.24 strict
!
rsvp-path LEAF1-ROOT1 mpls
 26.1.2.26 strict
!
rsvp-trunk LEAF1-ROOT1 ipv4
 primary fast-reroute protection facility
 primary path LEAF1-ROOT1
 to 9.9.9.9
!
rsvp-trunk LEAF1-ROOT2 ipv4
 primary fast-reroute protection facility
 primary path LEAF1-ROOT2
 to 24.24.24.24
!
• Create VRF for Isolated Routing Instances: Configure VRF on all Leaf and Root nodes to create isolated routing instances within the network. This enables separate routing tables and forwarding behaviors for different groups of network resources.
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!
mac vrf vrf103
 rd 8.8.8.8:103
 route-target both 65535:103
!
• Connect Network Interfaces: Configure network interfaces on all Leaf and Root nodes with connection details, IP addresses, and protocol settings. Enable label-switching and configure participation in the ISIS routing protocol, including support for protocols like LDP and RSVP for IPv4. These configurations optimize routing and resource management across the network.
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!
interface xe11
 description connected to ROOT2 int xe9
 ip address 24.1.4.25/24
 label-switching
 ip router isis ISIS-IGP
 enable-ldp ipv4
 enable-rsvp
!
interface xe20
 description connected to ROOT1 int xe20
 ip address 26.1.2.27/24
 label-switching
 ip router isis ISIS-IGP
 enable-ldp ipv4
 enable-rsvp
!
• Configure Switch: Set up a VLAN bridge by enabling the VLAN and associating specific VLANs with the bridge. Configure network interfaces as trunk ports to allow traffic for all permitted VLANs across the network. Designate interfaces connected to Leaf and Root nodes as member ports of the VLAN bridge. This setup optimizes network segmentation and traffic management
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!
bridge 1 protocol rstp vlan-bridge
!
vlan database
 vlan-reservation 4030-4094
 vlan 2-3010 bridge 1 state enable
!
interface po100
 switchport
 bridge-group 1
 switchport mode trunk
 switchport trunk allowed vlan all
!
interface lo
 ip address 32.32.32.32/32 secondary
!
interface xe9
 channel-group 100 mode active
!
interface xe17
 channel-group 100 mode active
!
interface xe1
 switchport
 bridge-group 1
 switchport mode trunk
 switchport trunk allowed vlan all
!
 exit
!