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配置VPLS与EVPN混合共存示例
本例介绍VPLS网络向EVPN网络演进的过程，该过程中会出现EVPN与VPLS混合共存的组网状态，且业务不会中断。
组网需求
如图12-60所示，该组网中已经部署了VPLS业务，现在用户希望在PE1和PE3上部署EVPN功能，即在PE1和PE3之间改为使用BGP EVPN承载业务。因此用户需要在PE1、PE3上配置EVPN实例并在PE1和PE3的广播域BD上绑定EVPN实例，然后在PE1和PE3之间建立BGP EVPN对等体关系。
配置注意事项
在配置过程中，需注意以下事项：
同一EVPN实例的Export VPN-Target列表与其它站点的Import VPN-Target列表有共同的VPN-Target，Import VPN-Target列表与其它站点的Export VPN-Target列表有共同的VPN-Target。
PE上配置的源地址建议为本地Loopback地址。
配置思路
采用如下的思路进行配置：
配置PE1、PE3上的BD模式EVPN实例和BD，并将BD绑定到相应的EVPN实例。
配置PE1、PE3上的源地址。
配置PE1与PE3间的BGP EVPN对等体关系。
操作步骤
- 网络中已经配置了EVC承载VPLS业务的功能，具体配置可以参考配置文件。
在PE1上执行display vsi name e1 verbose命令，可以看到名字为e1的VSI建立了两条分别到PE2和PE3的PW，VSI和PW的状态都为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 - 配置PE上的EVPN实例。
# 配置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] bridge-domain 10[*PE1-bd10] evpn binding vpn-instance evrf1[*PE1-bd10] quit[*PE1] commit# 配置PE3。
[~PE3] evpn vpn-instance evrf1 bd-mode[*PE3-evpn-instance-evrf1] route-distinguisher 100:1[*PE3-evpn-instance-evrf1] vpn-target 1:1[*PE3-evpn-instance-evrf1] quit[*PE3] bridge-domain 10[*PE3-bd10] evpn binding vpn-instance evrf1[*PE3-bd10] quit[*PE3] commit - 配置PE上的源地址。
# 配置PE1。
[~PE1] evpn source-address 1.1.1.1[*PE1] commit# 配置PE3。
[~PE3] evpn source-address 3.3.3.3[*PE3] commit - 配PE间的BGP EVPN对等体关系。
# 配置PE1。
[~PE1] bgp 100[~PE1-bgp] l2vpn-family evpn[*PE1-bgp-af-evpn] peer 3.3.3.3 enable[*PE1-bgp-af-evpn] quit[*PE1-bgp] quit[*PE1] commit# 配置PE3。
[~PE3] bgp 100[~PE3-bgp] l2vpn-family evpn[*PE3-bgp-af-evpn] peer 1.1.1.1 enable[*PE3-bgp-af-evpn] quit[*PE3-bgp] quit[*PE3] commit - 检查配置结果。
配置完成后，在PE1上执行display bgp evpn peer命令，可以看到PE1与PE3间BGP对等体关系已建立，并达到Established状态。
[~PE1] display bgp evpn peerBGP local router ID : 10.1.1.1 Local AS number : 100 Total number of peers : 1 Peers in established state : 1 Peer V AS MsgRcvd MsgSent OutQ Up/Down State PrefRcv 3.3.3.3 4 100 7 9 0 00:00:07 Established 1
在PE1上执行display bgp evpn all routing-table命令，可以看到PE3上收到的集成多播路由（Inclusive Multicast Route）。
[~PE1] display bgp evpn all routing-tableLocal 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 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 3.3.3.3 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 3.3.3.3在PE1上执行display alarm active root verbose命令，可以看到PE1上产生的VPLS VC状态由UP变为Down时触发的告警信息。其中表示告警原因的参数HWL2VpnStateChangeReason的值是98，表示EVPN连接成功导致VPLS VC变Down。
[~PE1] display alarm active root verboseSequence : 46 AlarmId : 0xD4D0001 AlarmName : hwVplsVcDown AlarmType : communication Severity : Major State : active RootKindFlag: Independent StartTime : 2018-03-26 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=-)
在PE1设备上执行display vsi name e1 verbose命令，可以看到仅剩下与PE2的PW，且处于Up状态。
[~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 : 2018/03/23 11:01:50 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 : 2018/03/23 11:38:42 PW Total Up Time : 0 days, 0 hours, 11 minutes, 4 seconds
配置文件
PE1的配置文件
# sysname PE1 # evpn vpn-instance evrf1 bd-mode route-distinguisher 100:1 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 # mpls ldp # interface GigabitEthernet1/0/0 undo shutdown # interface GigabitEthernet1/0/0.1 mode l2 encapsulation dot1q vid 10 bridge-domain 10 # interface GigabitEthernet2/0/0 undo shutdown ip address 10.1.1.1 255.255.255.0 mpls mpls ldp # interface GigabitEthernet3/0/0 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 # bgp 100 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 # 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 undo policy vpn-target peer 3.3.3.3 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 network 10.2.1.0 0.0.0.255 # evpn source-address 1.1.1.1 # return
PE2的配置文件
# 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 GigabitEthernet1/0/0 undo shutdown # interface GigabitEthernet1/0/0.1 mode l2 encapsulation dot1q vid 10 rewrite pop single bridge-domain 10 # interface GigabitEthernet2/0/0 undo shutdown ip address 10.2.1.1 255.255.255.0 mpls mpls ldp # interface GigabitEthernet3/0/0 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的配置文件
# sysname PE3 # evpn vpn-instance evrf1 bd-mode route-distinguisher 100:1 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 # mpls ldp # interface GigabitEthernet1/0/0 undo shutdown ip address 10.1.1.2 255.255.255.0 mpls mpls ldp # interface GigabitEthernet2/0/0 undo shutdown ip address 10.3.1.2 255.255.255.0 mpls mpls ldp # interface GigabitEthernet3/0/0 undo shutdown # interface GigabitEthernet3/0/0.1 mode l2 encapsulation dot1q vid 10 rewrite pop single bridge-domain 10 # interface LoopBack0 ip address 3.3.3.3 255.255.255.255 # bgp 100 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 # 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 undo policy vpn-target peer 1.1.1.1 enable # 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的配置文件
# sysname CE1 # interface GigabitEthernet1/0/0 portswitch undo shutdown port link-type trunk port trunk allow-pass vlan 10 # returnCE2的配置文件
# sysname CE2 # interface GigabitEthernet1/0/0 portswitch undo shutdown port link-type trunk port trunk allow-pass vlan 10 # returnCE3的配置文件
# sysname CE3 # interface GigabitEthernet1/0/0 portswitch undo shutdown port link-type trunk port trunk allow-pass vlan 10 # return
