Example for Configuring an EVPN L3VPNv6 HoVPN

This section describes an example for configuring an EVPN L3VPNv6 HoVPN.

Networking Requirements

At present, an IP bearer network uses L2VPN and L3VPN (HVPN) to carry Layer 2 and Layer 3 services, respectively. The protocols used in this scenario are complex. EVPN can carry both Layer 2 and Layer 3 services. To simplify service bearer protocols, many IP bearer networks are evolving to support EVPN. Specifically, L3VPN HVPN, which carries Layer 3 services, needs to evolve to EVPN L3VPN HVPN. In consideration of IPv4 address exhaustion, IPv6 addresses are used on user sites and IPv6 services are deployed. In this case, EVPN L3VPNv6 HoVPN can be deployed to carry IPv6 services. On the network shown in Figure 1, the UPE and SPE are connected at the access layer, and the SPE and NPE are connected at the aggregation layer. An IGP is deployed at the access layer and aggregation layer to allow service communication between the two layers, and EVPN L3VPNv6 HoVPN is deployed to allow E2E network communication. The UPE does not have specific routes to the NPE and can only send service data to the SPE over default routes. As a result, route isolation is implemented. An HoVPN can use devices with relatively poor route management capabilities as UPEs, reducing network deployment costs.

Figure 1 EVPN L3VPNv6 HoVPN networking

Interfaces 1 and 2 in this example represent GE 0/1/0 and GE 0/1/8, respectively.

Configuration Roadmap

The configuration roadmap is as follows:

Deploy an IGP between the UPE and SPE and between the SPE and NPE. In this example, deploy OSPF between the UPE and SPE and IS-IS between the SPE and NPE.
Configure MPLS LDP on the UPE, SPE, and NPE.
Create a VPN instance on the UPE, SPE, and NPE.
Configure access-side interfaces on the UPE and NPE and bind the VPN instance to these interfaces.
Configure a default static VPN route on the SPE.
Configure a route-policy on the NPE so that the NPE does not receive default routes.
Establish BGP EVPN peer relationships between the UPE and SPE and between the SPE and NPE, and configure the SPE to send packets to the UPE.

Data Preparation

To complete the configuration, you need the following data:

MPLS LSR IDs of the UPE, SPE, and NPE: 1.1.1.1, 2.2.2.2, and 3.3.3.3
VPN instance name: vpn1; RD of the VPN instance: 100:1
VPN target of the VPN instance: 2:2

Procedure

Assign an IP address to each device interface, including the loopback interfaces.
For details about how to configure IP addresses and masks of interfaces, see Configuration Files in this section.
Deploy an IGP between the UPE and SPE and between the SPE and NPE. In this example, deploy OSPF between the UPE and SPE and IS-IS between the SPE and NPE.
For configuration details, see Configuration Files in this section.
Configure MPLS LDP on the UPE, SPE, and NPE.
For configuration details, see Configuration Files in this section.

Create a VPN instance on the UPE, SPE, and NPE.

# Configure the UPE.

[~UPE] ip vpn-instance vpn1
[*UPE-vpn-instance-vpn1] ipv6-family
[*UPE-vpn-instance-vpn1-af-ipv6] route-distinguisher 100:1
[*UPE-vpn-instance-vpn1-af-ipv6] vpn-target 2:2 both evpn
[*UPE-vpn-instance-vpn1-af-ipv6] evpn mpls routing-enable
[*UPE-vpn-instance-vpn1-af-ipv6] quit
[*UPE-vpn-instance-vpn1] quit
[*UPE] commit

# Configure the SPE.

[~SPE] ip vpn-instance vpn1
[*SPE-vpn-instance-vpn1] ipv6-family
[*SPE-vpn-instance-vpn1-af-ipv6] route-distinguisher 100:1
[*SPE-vpn-instance-vpn1-af-ipv6] vpn-target 2:2 both evpn
[*SPE-vpn-instance-vpn1-af-ipv6] evpn mpls routing-enable
[*SPE-vpn-instance-vpn1-af-ipv6] quit
[*SPE-vpn-instance-vpn1] quit
[*SPE] commit

# Configure the NPE.

[~NPE] ip vpn-instance vpn1
[*NPE-vpn-instance-vpn1] ipv6-family
[*NPE-vpn-instance-vpn1-af-ipv6] route-distinguisher 100:1
[*NPE-vpn-instance-vpn1-af-ipv6] vpn-target 2:2 both evpn
[*NPE-vpn-instance-vpn1-af-ipv6] evpn mpls routing-enable
[*NPE-vpn-instance-vpn1-af-ipv6] quit
[*NPE-vpn-instance-vpn1] quit
[*NPE] commit

Configure access-side interfaces on the UPE and NPE and bind the VPN instance to these interfaces.

# Configure the UPE.

[~UPE] interface GigabitEthernet 0/1/8
[*UPE-GigabitEthernet0/1/8] ip binding vpn-instance vpn1
[*UPE-GigabitEthernet0/1/8] ipv6 enable
[*UPE-GigabitEthernet0/1/8] ipv6 address 2001:DB8:20::1 64
[*UPE-GigabitEthernet0/1/8] quit
[*UPE] commit

# Configure the NPE.

[~NPE] interface GigabitEthernet 0/1/8
[*NPE-GigabitEthernet0/1/8] ip binding vpn-instance vpn1
[*NPE-GigabitEthernet0/1/8] ipv6 enable
[*NPE-GigabitEthernet0/1/8] ipv6 address 2001:DB8:30::1 64
[*NPE-GigabitEthernet0/1/8] quit
[*NPE] commit

Configure a default static route on the SPE.

[~SPE] ipv6 route-static vpn-instance vpn1 :: 0 NULL0
[*SPE] commit

Configure a route-policy on the NPE so that the NPE does not receive default routes.

[~NPE] ip ipv6-prefix default index 10 permit :: 0
[*NPE] route-policy SPE deny node 10
[*NPE-route-policy] if-match ipv6 address prefix-list default
[*NPE-route-policy] quit
[*NPE] route-policy SPE permit node 20
[*NPE-route-policy] quit
[*NPE] ip vpn-instance vpn1
[*NPE-vpn-instance-vpn1] ipv6-family
[*NPE-vpn-instance-vpn1-af-ipv6] import route-policy SPE evpn
[*NPE-vpn-instance-vpn1-af-ipv6] quit
[*NPE-vpn-instance-vpn1] quit
[*NPE] commit

Establish BGP EVPN peer relationships between the UPE and SPE and between the SPE and NPE, and configure the SPE to send packets to the UPE.

# Configure the UPE.

[~UPE] bgp 100
[*UPE-bgp] peer 2.2.2.2 as-number 100
[*UPE-bgp] peer 2.2.2.2 connect-interface LoopBack1
[*UPE-bgp] l2vpn-family evpn
[*UPE-bgp-af-evpn] peer 2.2.2.2 enable
[*UPE-bgp-af-evpn] quit
[*UPE-bgp] ipv6-family vpn-instance vpn1
[*UPE-bgp-6-vpn1] advertise l2vpn evpn
[*UPE-bgp-6-vpn1] import-route direct
[*UPE-bgp-6-vpn1] quit
[*UPE-bgp] quit
[*UPE] commit

# Configure the SPE.

[~SPE] bgp 100
[*SPE-bgp] peer 1.1.1.1 as-number 100
[*SPE-bgp] peer 1.1.1.1 connect-interface LoopBack1
[*SPE-bgp] peer 3.3.3.3 as-number 100
[*SPE-bgp] peer 3.3.3.3 connect-interface LoopBack1
[*SPE-bgp] l2vpn-family evpn
[*SPE-bgp-af-evpn] peer 1.1.1.1 enable
[*SPE-bgp-af-evpn] peer 1.1.1.1 upe
[*SPE-bgp-af-evpn] peer 3.3.3.3 enable
[*SPE-bgp-af-evpn] quit
[*SPE-bgp] ipv6-family vpn-instance vpn1
[*SPE-bgp-6-vpn1] advertise l2vpn evpn
[*SPE-bgp-6-vpn1] network :: 0
[*SPE-bgp-6-vpn1] quit
[*SPE-bgp] quit
[*SPE] commit

# Configure the NPE.

[~NPE] bgp 100
[*NPE-bgp] peer 2.2.2.2 as-number 100
[*NPE-bgp] peer 2.2.2.2 connect-interface LoopBack1
[*NPE-bgp] l2vpn-family evpn
[*NPE-bgp-af-evpn] peer 2.2.2.2 enable
[*NPE-bgp-af-evpn] quit
[*NPE-bgp] ipv6-family vpn-instance vpn1
[*NPE-bgp-6-vpn1] advertise l2vpn evpn
[*NPE-bgp-6-vpn1] import-route direct
[*NPE-bgp-6-vpn1] quit
[*NPE-bgp] quit
[*NPE] commit

Verify the configuration.

After completing the configurations, run the display bgp evpn all routing-table command on the NPE to view the EVPN routes received from the UPE.

[~NPE] display bgp evpn all routing-table
 Local AS number : 100

 BGP Local router ID is 10.2.1.2
 Status codes: * - valid, > - best, d - damped, x - best external, a - add path,
               h - history,  i - internal, s - suppressed, S - Stale
               Origin : i - IGP, e - EGP, ? - incomplete

 
 EVPN address family:
 Number of Ip Prefix Routes: 3
 Route Distinguisher: 100:1
       Network(EthTagId/IpPrefix/IpPrefixLen)                 NextHop
 *>i   0:[::]:0                                               2.2.2.2
 *>i   0:[2001:DB8:20::]:64                                   2.2.2.2
 *>    0:[2001:DB8:30::]:64                                   0.0.0.0

Run the display ip routing-table vpn-instance vpn1 command on the NPE to view the VPN IPv6 routes.

[~NPE] display ipv6 routing-table vpn-instance vpn1
Routing Table : vpn1
         Destinations : 4        Routes : 4         

Destination  : 2001:DB8:20::                           PrefixLength : 64
NextHop      : ::FFFF:2.2.2.2                          Preference   : 255
Cost         : 0                                       Protocol     : IBGP
RelayNextHop : ::FFFF:10.2.1.1                         TunnelID     : 0x0000000001004c4b42
Interface    : GigabitEthernet0/1/0                    Flags        : RD

Destination  : 2001:DB8:30::                           PrefixLength : 64
NextHop      : 2001:DB8:30::1                          Preference   : 0
Cost         : 0                                       Protocol     : Direct
RelayNextHop : ::                                      TunnelID     : 0x0
Interface    : GigabitEthernet0/1/8                    Flags        : D

Destination  : 2001:DB8:30::1                          PrefixLength : 128
NextHop      : ::1                                     Preference   : 0
Cost         : 0                                       Protocol     : Direct
RelayNextHop : ::                                      TunnelID     : 0x0
Interface    : GigabitEthernet0/1/8                    Flags        : D

Destination  : FE80::                                  PrefixLength : 10
NextHop      : ::                                      Preference   : 0
Cost         : 0                                       Protocol     : Direct
RelayNextHop : ::                                      TunnelID     : 0x0
Interface    : NULL0                                   Flags        : DB

Run the display bgp evpn all routing-table command on the UPE to view the default EVPN routes received from the SPE.

[~UPE] display bgp evpn all routing-table
 Local AS number : 100

 BGP Local router ID is 10.1.1.1
 Status codes: * - valid, > - best, d - damped, x - best external, a - add path,
               h - history,  i - internal, s - suppressed, S - Stale
               Origin : i - IGP, e - EGP, ? - incomplete

 
 EVPN address family:
 Number of Ip Prefix Routes: 2
 Route Distinguisher: 100:1
       Network(EthTagId/IpPrefix/IpPrefixLen)                 NextHop
 *>i   0:[::]:0                                               2.2.2.2
 *>    0:[2001:DB8:20::]:64                                   0.0.0.0

Run the display ipv6 routing-table vpn-instance vpn1 command on the UPE to view the default VPN IPv6 routes.

[~UPE] display ipv6 routing-table vpn-instance vpn1
Routing Table : vpn1
         Destinations : 4        Routes : 4         

Destination  : ::                                      PrefixLength : 0
NextHop      : ::FFFF:2.2.2.2                          Preference   : 255
Cost         : 0                                       Protocol     : IBGP
RelayNextHop : ::FFFF:10.1.1.2                         TunnelID     : 0x0000000001004c4b42
Interface    : GigabitEthernet0/1/0                    Flags        : RD

Destination  : 2001:DB8:20::                           PrefixLength : 64
NextHop      : 2001:DB8:20::1                          Preference   : 0
Cost         : 0                                       Protocol     : Direct
RelayNextHop : ::                                      TunnelID     : 0x0
Interface    : GigabitEthernet0/1/8                    Flags        : D

Destination  : 2001:DB8:20::1                          PrefixLength : 128
NextHop      : ::1                                     Preference   : 0
Cost         : 0                                       Protocol     : Direct
RelayNextHop : ::                                      TunnelID     : 0x0
Interface    : GigabitEthernet0/1/8                    Flags        : D

Destination  : FE80::                                  PrefixLength : 10
NextHop      : ::                                      Preference   : 0
Cost         : 0                                       Protocol     : Direct
RelayNextHop : ::                                      TunnelID     : 0x0
Interface    : NULL0                                   Flags        : DB

Configuration Files

UPE configuration file

#
sysname UPE
#
ip vpn-instance vpn1
 ipv6-family
  route-distinguisher 100:1
  apply-label per-instance
  vpn-target 2:2 export-extcommunity evpn
  vpn-target 2:2 import-extcommunity evpn
  evpn mpls routing-enable
#
mpls lsr-id 1.1.1.1
#
mpls
#
mpls ldp
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.1.1.1 255.255.255.0
 mpls
 mpls ldp
#
interface GigabitEthernet0/1/8
 undo shutdown
 ip binding vpn-instance vpn1
 ipv6 enable
 ipv6 address 2001:DB8:20::1/64
#
interface LoopBack1
 ip address 1.1.1.1 255.255.255.255
#
bgp 100
 peer 2.2.2.2 as-number 100
 peer 2.2.2.2 connect-interface LoopBack1
 #
 ipv4-family unicast
  undo synchronization
  peer 2.2.2.2 enable
 #
 ipv6-family vpn-instance vpn1
  import-route direct
  advertise l2vpn evpn
 #
 l2vpn-family evpn
  undo policy vpn-target
  peer 2.2.2.2 enable
#
ospf 1          
 area 0.0.0.0
  network 1.1.1.1 0.0.0.0
  network 10.1.1.0 0.0.0.255
#
return

SPE configuration file

#
sysname SPE
#
ip vpn-instance vpn1
 ipv6-family
  route-distinguisher 100:1
  apply-label per-instance
  vpn-target 2:2 export-extcommunity evpn
  vpn-target 2:2 import-extcommunity evpn
  evpn mpls routing-enable
#
mpls lsr-id 2.2.2.2
#
mpls
#
mpls ldp
#
isis 1
 network-entity 10.0000.0000.0002.00
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.1.1.2 255.255.255.0
 mpls
 mpls ldp
#
interface GigabitEthernet0/1/8
 undo shutdown  
 ip address 10.2.1.1 255.255.255.0
 isis enable 1
 mpls
 mpls ldp
#               
interface LoopBack1
 ip address 2.2.2.2 255.255.255.255
 isis enable 1
#
bgp 100
 peer 1.1.1.1 as-number 100
 peer 1.1.1.1 connect-interface LoopBack1
 peer 3.3.3.3 as-number 100
 peer 3.3.3.3 connect-interface LoopBack1
 #
 ipv4-family unicast
  undo synchronization
  peer 1.1.1.1 enable
  peer 3.3.3.3 enable
 #
 ipv6-family vpn-instance vpn1
  network :: 0
  advertise l2vpn evpn
 #
 l2vpn-family evpn
  undo policy vpn-target
  peer 1.1.1.1 enable
  peer 1.1.1.1 upe
  peer 3.3.3.3 enable
#
ospf 1
 area 0.0.0.0
  network 2.2.2.2 0.0.0.0
  network 10.1.1.0 0.0.0.255
#
ipv6 route-static vpn-instance vpn1 :: 0 NULL0
#               
return

NPE configuration file

#
sysname NPE
#
ip vpn-instance vpn1
 ipv6-family
  route-distinguisher 100:1
  apply-label per-instance
  import route-policy SPE evpn
  vpn-target 2:2 export-extcommunity evpn
  vpn-target 2:2 import-extcommunity evpn
  evpn mpls routing-enable
#               
mpls lsr-id 3.3.3.3
#
mpls
#
mpls ldp
#
isis 1
 network-entity 10.0000.0000.0003.00
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.2.1.2 255.255.255.0
 isis enable 1
 mpls
 mpls ldp
#
interface GigabitEthernet0/1/8
 undo shutdown
 ip binding vpn-instance vpn1
 ipv6 enable
 ipv6 address 2001:DB8:30::1/64
#
interface LoopBack1
 ip address 3.3.3.3 255.255.255.255
 isis enable 1
#
bgp 100
 peer 2.2.2.2 as-number 100
 peer 2.2.2.2 connect-interface LoopBack1
 #
 ipv4-family unicast
  undo synchronization
  peer 2.2.2.2 enable
 #
 ipv6-family vpn-instance vpn1
  import-route direct
  advertise l2vpn evpn
 #
 l2vpn-family evpn
  undo policy vpn-target
  peer 2.2.2.2 enable
#
route-policy SPE deny node 10
 if-match ipv6 address prefix-list default
#
route-policy SPE permit node 20
#
ip ipv6-prefix default index 10 permit :: 0
#
return