Example for Configuring Coexistence of VPLS and EVPN VPLS over SRv6 BE

This section provides an example for configuring coexistence of VPLS and EVPN VPLS over SRv6 BE to ensure service continuity during the evolution from traditional VPLS to EVPN VPLS over SRv6 BE.

Networking Requirements

On the network shown in Figure 1, traditional VPLS services have been deployed. A user wants to deploy EVPN VPLS over SRv6 BE on PE1 and PE3 to carry new services. In this case, you need to configure the coexistence of VPLS and EVPN VPLS over SRv6 BE on PE1 and PE3 to ensure that both old and new services can run properly.

Figure 1 Coexistence of VPLS and EVPN VPLS over SRv6 BE

Interface 1, interface 2, and interface 3 in this example represent GE 0/1/0, GE 0/1/8, and GE 0/1/16, respectively.

Configuration Notes

When configuring the coexistence of VPLS and EVPN VPLS over SRv6 BE, note the following:

For the same EVPN instance, the export VPN target list of one site must contain the same VPN targets as those in the import VPN target lists of the other sites. Similarly, the import VPN target list of one site must contain the same VPN targets as those in the export VPN target lists of the other sites.
Using the local loopback interface address of each PE as an EVPN source address is recommended.

Configuration Roadmap

The configuration roadmap is as follows:

Configure an IGP on each device. Configure OSPF on PE1, PE2, and PE3 to implement IPv4 route interworking; configure IS-ISv6 on PE1 and PE3 to implement IPv6 interworking.
Configure EVC VPLS on PE1, PE2, and PE3.
Configure BD EVPN on PE1 and PE3.
Configure SRv6 BE between PE1 and PE3.

Data Preparation

To complete the configuration, you need the following data:

Interface names and IP addresses of the devices
MPLS LSR IDs of the devices
Names, RDs, and VPN targets of the EVPN instances created on PE1 and PE3
Locator names, Arguments field lengths, and dynamically generated opcodes on PE1 and PE3

Procedure

Assign an IP address to each interface according to Figure 1.
For configuration details, see Configuration Files in this section.
Configure an IGP on each device.
Configure OSPF on PE1, PE2, and PE3 to implement IPv4 route interworking; configure IS-ISv6 on PE1 and PE3 to implement IPv6 route interworking.

Configure an EVC to carry VPLS services.

For configuration details, see Configuration Files in this section. Run the display vsi name e1 verbose command on PE1. The command output shows that the VSI named e1 has separate PWs to PE2 and PE3, and the VSI status and PW status are up.

[~PE1] display vsi name e1 verbose

 ***VSI Name               : e1
    Work Mode              : bd-mode
    Administrator VSI      : no
    Isolate Spoken         : disable
    VSI Index              : 2
    PW Signaling           : bgp
    Member Discovery Style : --
    Bridge-domain Mode     : enable
    PW MAC Learn Style     : qualify
    Encapsulation Type     : vlan
    MTU                    : 1500
    Diffserv Mode          : uniform
    Service Class          : --
    Color                  : --
    DomainId               : 255
    Domain Name            : 
    Ignore AcState         : disable
    P2P VSI                : disable
    Create Time            : 0 days, 0 hours, 50 minutes, 49 seconds
    VSI State              : up
    Resource Status        : --

    BGP RD                 : 100:1
    SiteID/Range/Offset    : 1/10/0
    Import vpn target      : 1:1                    
    Export vpn target      : 1:1                    
    Remote Label Block     : 294928/8/0 294928/8/0 
    Local Label Block      : 0/294928/8/0 

    Access Bridge-domain   : Bridge-domain 10 
    Vac State              : up 
    Last Up Time           : 2018/03/23 11:01:50
    Total Up Time          : 0 days, 0 hours, 37 minutes, 53 seconds

  **PW Information:

   *Peer Ip Address        : 2.2.2.2
    PW State               : up
    Local VC Label         : 294930
    Remote VC Label        : 294929
    PW Type                : label
    Tunnel ID              : 0x0000000001004c4bc1 
    Broadcast Tunnel ID    : --
    Broad BackupTunnel ID  : --
    Ckey                   : 129
    Nkey                   : 16777346
    Main PW Token          : 0x0
    Slave PW Token         : 0x0
    Tnl Type               : ldp
    OutInterface           : --
    Backup OutInterface    : --
    Stp Enable             : 0
    Mac Flapping           : 0
    PW Last Up Time        : 2018/03/23 11:38:42
    PW Total Up Time       : 0 days, 0 hours, 1 minutes, 1 seconds
   *Peer Ip Address        : 3.3.3.3
    PW State               : up
    Local VC Label         : 294931
    Remote VC Label        : 294929
    PW Type                : label
    Tunnel ID              : 0x0000000001004c4b42 
    Broadcast Tunnel ID    : --
    Broad BackupTunnel ID  : --
    Ckey                   : 130
    Nkey                   : 16777347
    Main PW Token          : 0x0
    Slave PW Token         : 0x0
    Tnl Type               : ldp
    OutInterface           : --
    Backup OutInterface    : --
    Stp Enable             : 0
    Mac Flapping           : 0
    PW Last Up Time        : 2018/03/23 11:39:10
    PW Total Up Time       : 0 days, 0 hours, 0 minutes, 33 seconds

Configure BD EVPN on PE1 and PE3.

# Configure PE1.

[~PE1] evpn vpn-instance evrf1 bd-mode
[*PE1-evpn-instance-evrf1] route-distinguisher 100:1
[*PE1-evpn-instance-evrf1] vpn-target 1:1
[*PE1-evpn-instance-evrf1] quit
[*PE1] evpn source-address 1.1.1.1
[*PE1] bgp 100
[*PE1-bgp] router-id 1.1.1.1
[*PE1-bgp] peer 2001:DB8:3::3 as-number 100
[*PE1-bgp] peer 2001:DB8:3::3 connect-interface LoopBack 0
[*PE1-bgp] l2vpn-family evpn
[*PE1-bgp-af-evpn] peer 2001:DB8:3::3 enable
[*PE1-bgp-af-evpn] peer 2001:DB8:3::3 advertise encap-type srv6
[*PE1-bgp-af-evpn] quit
[*PE1-bgp] quit
[*PE1] bridge-domain 10
[*PE1-bd10] evpn binding vpn-instance evrf1
[*PE1-bd10] quit
[*PE1] commit

# Configure PE3.

[~PE3] evpn vpn-instance evrf1 bd-mode
[*PE3-evpn-instance-evrf1] route-distinguisher 100:3
[*PE3-evpn-instance-evrf1] vpn-target 1:1
[*PE3-evpn-instance-evrf1] quit
[*PE3] evpn source-address 3.3.3.3
[*PE3] bgp 100
[*PE3-bgp] router-id 3.3.3.3
[*PE3-bgp] peer 2001:DB8:1::1 as-number 100
[*PE3-bgp] peer 2001:DB8:1::1 connect-interface LoopBack 0
[*PE3-bgp] l2vpn-family evpn
[*PE3-bgp-af-evpn] peer 2001:DB8:1::1 enable
[*PE3-bgp-af-evpn] peer 2001:DB8:1::1 advertise encap-type srv6
[*PE3-bgp-af-evpn] quit
[*PE3-bgp] quit
[*PE3] bridge-domain 10
[*PE3-bd10] evpn binding vpn-instance evrf1
[*PE3-bd10] quit
[*PE3] commit

Configure SRv6 BE between PE1 and PE3.

# Configure PE1.

[~PE1] segment-routing ipv6
[*PE1-segment-routing-ipv6] encapsulation source-address 2001:DB8:1::1
[*PE1-segment-routing-ipv6] locator PE1 ipv6-prefix 2001:DB8:11:: 64
[*PE1-segment-routing-ipv6-locator] quit
[*PE1-segment-routing-ipv6] locator PE1_ARG ipv6-prefix 2001:DB8:12:: 64 args 10
[*PE1-segment-routing-ipv6-locator] quit
[*PE1-segment-routing-ipv6] quit
[*PE1] isis 1
[*PE1-isis-1] segment-routing ipv6 locator PE1
[*PE1-isis-1] segment-routing ipv6 locator PE1_ARG auto-sid-disable
[*PE1-isis-1] quit
[*PE1] evpn vpn-instance evrf1 bd-mode
[*PE1-evpn-instance-evrf1] segment-routing ipv6 locator PE1_ARG unicast-locator PE1
[*PE1-evpn-instance-evrf1] segment-routing ipv6 best-effort
[*PE1-evpn-instance-evrf1] quit
[*PE1] commit

# Configure PE3.

[~PE3] segment-routing ipv6
[*PE3-segment-routing-ipv6] encapsulation source-address 2001:DB8:3::3
[*PE3-segment-routing-ipv6] locator PE3 ipv6-prefix 2001:DB8:21:: 64
[*PE3-segment-routing-ipv6-locator] quit
[*PE3-segment-routing-ipv6] locator PE3_ARG ipv6-prefix 2001:DB8:22:: 64 args 10
[*PE3-segment-routing-ipv6-locator] quit
[*PE3-segment-routing-ipv6] quit
[*PE3] isis 1
[*PE3-isis-1] segment-routing ipv6 locator PE3
[*PE3-isis-1] segment-routing ipv6 locator PE3_ARG auto-sid-disable
[*PE3-isis-1] quit
[*PE3] evpn vpn-instance evrf1 bd-mode
[*PE3-evpn-instance-evrf1] segment-routing ipv6 locator PE3_ARG unicast-locator PE3
[*PE3-evpn-instance-evrf1] segment-routing ipv6 best-effort
[*PE3-evpn-instance-evrf1] quit
[*PE3] commit

Verify the configuration.

After the configurations are complete, run the display bgp evpn peer command on PE1. The command output shows that the BGP EVPN peer relationship has been established between the PEs and is in Established state.

[~PE1] display bgp evpn peer
 BGP local router ID : 1.1.1.1
 Local AS number : 100
 Total number of peers : 1                 Peers in established state : 1

  Peer            V          AS  MsgRcvd  MsgSent  OutQ  Up/Down       State  PrefRcv
  2001:DB8:3::3   4         100        7        9     0 00:00:07 Established        1

Run the display bgp evpn all routing-table command on PE1. The command output shows information about inclusive multicast routes received from PE3.

[~PE1] display bgp evpn all routing-table 
 Local AS number : 100

 BGP Local router ID is 1.1.1.1
 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 Inclusive Multicast Routes: 2
 Route Distinguisher: 100:1
       Network(EthTagId/IpAddrLen/OriginalIp)                 NextHop
 *>    0:32:1.1.1.1                                           127.0.0.1
 *>i   0:32:3.3.3.3                                          2001:DB8:3::3

m
 EVPN-Instance evrf1:
 Number of Inclusive Multicast Routes: 2
       Network(EthTagId/IpAddrLen/OriginalIp)                 NextHop
 *>    0:32:1.1.1.1                                           127.0.0.1
 *>i   0:32:3.3.3.3                                          2001:DB8:3::3

Run the display alarm active root verbose command on PE1. The command output shows information about the alarm triggered when the VPLS VC on PE1 goes down. The value of HWL2VpnStateChangeReason (alarm cause parameter) is 98, indicating that the successful establishment of an EVPN connection causes the VPLS VC to go down.

[~PE1] display alarm active root verbose 
Sequence    : 46        
AlarmId     : 0xD4D0001             AlarmName : hwVplsVcDown                                                    
AlarmType   : communication         Severity  : Major            State : active 
RootKindFlag: Independent           
StartTime   : 2020-11-26 02:42:23                     
Description : The status of the VPLS VC turned DOWN. (VsiName=e1, PwId=3, RemoteIp=3.3.3.3, PwType=1, HWL2VpnStateChangeReason=98, SysUpTime=23691243, TunnelPolicyName=-)

Run the display vsi name e1 verbose command on PE1. The command output shows that only the PW to PE2 is available and its status is up.

[~PE1] display vsi name e1 verbose
 ***VSI Name               : e1
    Work Mode              : bd-mode
    Administrator VSI      : no
    Isolate Spoken         : disable
    VSI Index              : 2
    PW Signaling           : bgp
    Member Discovery Style : --
    Bridge-domain Mode     : enable
    PW MAC Learn Style     : qualify
    Encapsulation Type     : vlan
    MTU                    : 1500
    Diffserv Mode          : uniform
    Service Class          : --
    Color                  : --
    DomainId               : 255
    Domain Name            : 
    Ignore AcState         : disable
    P2P VSI                : disable
    Create Time            : 0 days, 1 hours, 0 minutes, 52 seconds
    VSI State              : up
    Resource Status        : --

    BGP RD                 : 100:1
    SiteID/Range/Offset    : 1/10/0
    Import vpn target      : 1:1                    
    Export vpn target      : 1:1                    
    Remote Label Block     : 294928/8/0 294928/8/0 
    Local Label Block      : 0/294928/8/0 

    Access Bridge-domain   : Bridge-domain 10 
    Vac State              : up 
    Last Up Time           : 2020-11-26 03:01:50
    Total Up Time          : 0 days, 0 hours, 47 minutes, 56 seconds

  **PW Information:

   *Peer Ip Address        : 2.2.2.2
    PW State               : up
    Local VC Label         : 294930
    Remote VC Label        : 294929
    PW Type                : label
    Tunnel ID              : 0x0000000001004c4bc1 
    Broadcast Tunnel ID    : --
    Broad BackupTunnel ID  : --
    Ckey                   : 129
    Nkey                   : 16777346
    Main PW Token          : 0x0
    Slave PW Token         : 0x0
    Tnl Type               : ldp
    OutInterface           : --
    Backup OutInterface    : --
    Stp Enable             : 0
    Mac Flapping           : 0
    PW Last Up Time        : 2020-11-26 03:38:42
    PW Total Up Time       : 0 days, 0 hours, 11 minutes, 4 seconds

Configuration Files

PE1 configuration file

#
sysname PE1
#
evpn vpn-instance evrf1 bd-mode
 route-distinguisher 100:1
 segment-routing ipv6 best-effort
 segment-routing ipv6 locator PE1_ARG unicast-locator PE1
 vpn-target 1:1 export-extcommunity
 vpn-target 1:1 import-extcommunity
#
mpls lsr-id 1.1.1.1
#
mpls
#
mpls l2vpn      
#
vsi e1 bd-mode
 pwsignal bgp
  route-distinguisher 100:1
  vpn-target 1:1 import-extcommunity
  vpn-target 1:1 export-extcommunity
  site 1 range 10 default-offset 0
#
bridge-domain 10
 l2 binding vsi e1
 evpn binding vpn-instance evrf1
#
segment-routing ipv6
 encapsulation source-address 2001:DB8:1::1
 locator PE1 ipv6-prefix 2001:DB8:11:: 64
 locator PE1_ARG ipv6-prefix 2001:DB8:12:: 64 args 10
#
mpls ldp
#
isis 1          
 is-level level-1
 cost-style wide
 network-entity 10.0000.0000.0001.00
 #
 ipv6 enable topology ipv6
 segment-routing ipv6 locator PE1
 segment-routing ipv6 locator PE1_ARG auto-sid-disable
 #
#
interface GigabitEthernet0/1/0
 undo shutdown
#
interface GigabitEthernet0/1/0.1 mode l2
 encapsulation dot1q vid 10
 bridge-domain 10
#               
interface GigabitEthernet0/1/8
 undo shutdown
 ip address 10.1.1.1 255.255.255.0
 ipv6 enable
 ipv6 address 2001:DB8:10::1/64
 isis ipv6 enable 1
 mpls
 mpls ldp
#
interface GigabitEthernet0/1/16
 undo shutdown
 ip address 10.2.1.2 255.255.255.0
 mpls
 mpls ldp
#
interface LoopBack0
 ip address 1.1.1.1 255.255.255.255
 ipv6 enable
 ipv6 address 2001:DB8:1::1/64
 isis ipv6 enable 1
#
bgp 100
 router-id 1.1.1.1
 peer 2.2.2.2 as-number 100
 peer 2.2.2.2 connect-interface LoopBack0
 peer 3.3.3.3 as-number 100
 peer 3.3.3.3 connect-interface LoopBack0
 peer 2001:DB8:3::3 as-number 100
 peer 2001:DB8:3::3 connect-interface LoopBack0
 #
 ipv4-family unicast
  undo synchronization
  peer 2.2.2.2 enable
  peer 3.3.3.3 enable
 #
 l2vpn-ad-family
  policy vpn-target
  signaling vpls
  peer 2.2.2.2 enable
  peer 3.3.3.3 enable
 #
 l2vpn-family evpn
  policy vpn-target
  peer 2001:DB8:3::3 enable
  peer 2001:DB8:3::3 advertise encap-type srv6
#
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
  network 10.2.1.0 0.0.0.255
#
evpn source-address 1.1.1.1
#
return

PE2 configuration file

#
sysname PE2
#
mpls lsr-id 2.2.2.2
#
mpls
#
mpls l2vpn
#
vsi e1 bd-mode
 pwsignal bgp
  route-distinguisher 100:1
  vpn-target 1:1 import-extcommunity
  vpn-target 1:1 export-extcommunity
  site 2 range 10 default-offset 0
#
bridge-domain 10
 l2 binding vsi e1
#
mpls ldp
#
interface GigabitEthernet0/1/0
 undo shutdown
#               
interface GigabitEthernet0/1/0.1 mode l2
 encapsulation dot1q vid 10
 rewrite pop single
 bridge-domain 10
#
interface GigabitEthernet0/1/8
 undo shutdown
 ip address 10.2.1.1 255.255.255.0
 mpls
 mpls ldp
#
interface GigabitEthernet0/1/16
 undo shutdown
 ip address 10.3.1.1 255.255.255.0
 mpls
 mpls ldp
#
interface LoopBack0
 ip address 2.2.2.2 255.255.255.255
#
bgp 100
 peer 1.1.1.1 as-number 100
 peer 1.1.1.1 connect-interface LoopBack0
 peer 3.3.3.3 as-number 100
 peer 3.3.3.3 connect-interface LoopBack0
 #
 ipv4-family unicast
  undo synchronization
  peer 1.1.1.1 enable
  peer 3.3.3.3 enable
 #
 l2vpn-ad-family
  policy vpn-target
  signaling vpls
  peer 1.1.1.1 enable
  peer 3.3.3.3 enable
#
ospf 1
 area 0.0.0.0
  network 2.2.2.2 0.0.0.0
  network 10.2.1.0 0.0.0.255
  network 10.3.1.0 0.0.0.255
#
return

PE3 configuration file

#
sysname PE3
#
evpn vpn-instance evrf1 bd-mode
 route-distinguisher 100:3
 segment-routing ipv6 best-effort
 segment-routing ipv6 locator PE3_ARG unicast-locator PE3
 vpn-target 1:1 export-extcommunity
 vpn-target 1:1 import-extcommunity
#
mpls lsr-id 3.3.3.3
#
mpls
#
mpls l2vpn      
#
vsi e1 bd-mode
 pwsignal bgp
  route-distinguisher 100:1
  vpn-target 1:1 import-extcommunity
  vpn-target 1:1 export-extcommunity
  site 3 range 10 default-offset 0
#
bridge-domain 10
 l2 binding vsi e1
 evpn binding vpn-instance evrf1
#
segment-routing ipv6
 encapsulation source-address 2001:DB8:3::3
 locator PE3 ipv6-prefix 2001:DB8:21:: 64
 locator PE3_ARG ipv6-prefix 2001:DB8:22:: 64 args 10
#
mpls ldp
#
isis 1          
 is-level level-1
 cost-style wide
 network-entity 10.0000.0000.0003.00
 #
 ipv6 enable topology ipv6
 segment-routing ipv6 locator PE3
 segment-routing ipv6 locator PE3_ARG auto-sid-disable
 #
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.1.1.2 255.255.255.0
 ipv6 enable
 ipv6 address 2001:DB8:10::2/64
 isis ipv6 enable 1
 mpls
 mpls ldp
#
interface GigabitEthernet0/1/8
 undo shutdown
 ip address 10.3.1.2 255.255.255.0
 mpls
 mpls ldp
#
interface GigabitEthernet0/1/16
 undo shutdown
#
interface GigabitEthernet0/1/16.1 mode l2
 encapsulation dot1q vid 10
 rewrite pop single
 bridge-domain 10
#
interface LoopBack0
 ip address 3.3.3.3 255.255.255.255
 ipv6 enable
 ipv6 address 2001:DB8:3::3/64
 isis ipv6 enable 1
#
bgp 100
 router-id 3.3.3.3
 peer 1.1.1.1 as-number 100
 peer 1.1.1.1 connect-interface LoopBack0
 peer 2.2.2.2 as-number 100
 peer 2.2.2.2 connect-interface LoopBack0
 peer 2001:DB8:1::1 as-number 100
 peer 2001:DB8:1::1 connect-interface LoopBack0
 #
 ipv4-family unicast
  undo synchronization
  peer 1.1.1.1 enable
  peer 2.2.2.2 enable
 #
 l2vpn-ad-family
  policy vpn-target
  signaling vpls
  peer 1.1.1.1 enable
  peer 2.2.2.2 enable
 #
 l2vpn-family evpn
  policy vpn-target
  peer 2001:DB8:1::1 enable
  peer 2001:DB8:1::1 advertise encap-type srv6
#
ospf 1
 area 0.0.0.0   
  network 3.3.3.3 0.0.0.0
  network 10.1.1.0 0.0.0.255
  network 10.3.1.0 0.0.0.255
#
evpn source-address 3.3.3.3
#
return

CE1 configuration file

#
sysname CE1
#
interface GigabitEthernet0/1/0
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10
#
return

CE2 configuration file

#
sysname CE2
#
interface GigabitEthernet0/1/0
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10
#
return

CE3 configuration file

#
sysname CE3
#
interface GigabitEthernet0/1/0
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10
#
return