组网需求

如图1所示：PE1、P和PE2属于同一自治系统，要求它们之间通过IS-IS协议达到IPv6网络互连。然后在PE1和PE2之间通过建立双向SRv6 BE承载EVPN E-LAN业务。

图1 配置EVPN VPLS over SRv6 BE组网图

配置思路

使能PE1、P和PE2各接口的IPv6转发能力，配置各接口的IPv6地址。
在PE1、P和PE2上使能IS-IS，配置Level级别，指定网络实体。
在PE设备上配置BD模式的EVPN实例，并将相应的BD绑定到接入侧子接口。
在PE设备之间建立BGP EVPN对等体关系。
在PE设备上配置SRv6 BE。

操作步骤

1.使能各接口的IPv6转发能力，配置IPv6地址

<HUAWEI> system-view
[~HUAWEI] sysname PE1
[*HUAWEI] commit
[~PE1] interface gigabitethernet 1/0/0
[~PE1-GigabitEthernet1/0/0] ipv6 enable
[*PE1-GigabitEthernet1/0/0] ipv6 address 2001:DB8:10::1 64
[*PE1-GigabitEthernet1/0/0] quit
[*PE1] interface LoopBack 1
[*PE1-LoopBack1] ip address 1.1.1.1 32
[*PE1-LoopBack1] ipv6 enable
[*PE1-LoopBack1] ipv6 address 2001:DB8:1::1 128
[*PE1-LoopBack1] quit
[*PE1] commit

由于需要为EVPN源地址准备IPv4地址，因此这里Loopback接口还需配置IPv4地址。这里以PE1为例，其他设备的配置过程相同，详情可参考配置文件。

2.配置IS-IS

# 配置PE1。

[~PE1] isis 1
[*PE1-isis-1] is-level level-1
[*PE1-isis-1] cost-style wide
[*PE1-isis-1] network-entity 10.0000.0000.0001.00
[*PE1-isis-1] ipv6 enable topology ipv6
[*PE1-isis-1] quit
[*PE1] interface gigabitethernet 1/0/0
[*PE1-GigabitEthernet1/0/0] isis ipv6 enable 1
[*PE1-GigabitEthernet1/0/0] quit
[*PE1] interface loopback1
[*PE1-LoopBack1] isis ipv6 enable 1
[*PE1-LoopBack1] commit
[~PE1-LoopBack1] quit

# 配置P。

[~P] isis 1
[*P-isis-1] is-level level-1
[*P-isis-1] cost-style wide
[*P-isis-1] network-entity 10.0000.0000.0002.00
[*P-isis-1] ipv6 enable topology ipv6
[*P-isis-1] quit
[*P] interface gigabitethernet 1/0/0
[*P-GigabitEthernet1/0/0] isis ipv6 enable 1
[*P-GigabitEthernet1/0/0] quit
[*P] interface gigabitethernet 2/0/0
[*P-GigabitEthernet2/0/0] isis ipv6 enable 1
[*P-GigabitEthernet2/0/0] quit
[*P] interface loopback1
[*P-LoopBack1] isis ipv6 enable 1
[*P-LoopBack1] commit
[~P-LoopBack1] quit

# 配置PE2。

[~PE2] isis 1
[*PE2-isis-1] is-level level-1
[*PE2-isis-1] cost-style wide
[*PE2-isis-1] network-entity 10.0000.0000.0003.00
[*PE2-isis-1] ipv6 enable topology ipv6
[*PE2-isis-1] quit
[*PE2] interface gigabitethernet 1/0/0
[*PE2-GigabitEthernet1/0/0] isis ipv6 enable 1
[*PE2-GigabitEthernet1/0/0] quit
[*PE2] interface loopback1
[*PE2-LoopBack1] isis ipv6 enable 1
[*PE2-LoopBack1] commit
[~PE2-LoopBack1] quit

配置完成后，可按如下指导检查IS-IS是否配置成功。

# 显示IS-IS邻居信息。以PE1为例。

[~PE1] display isis peerPeer information for ISIS(1)System Id     Interface         Circuit Id        State HoldTime Type     PRI
--------------------------------------------------------------------------------
0000.0000.0002* GE1/0/0           0000.0000.0002.01  Up   8s       L1       64 Total Peer(s): 1

# 显示IS-IS路由表信息。以PE1为例。

[~PE1] display isis routeRoute information for ISIS(1)-----------------------------ISIS(1) Level-1 Forwarding Table--------------------------------IPV6 Dest.        ExitInterface      NextHop                    Cost     Flags
--------------------------------------------------------------------------------
2001:DB8:1::1/128  GE1/0/0            Direct                     10       D/-/L/-
2001:DB8:2::2/128  GE1/0/0            FE80::3A5D:67FF:FE31:307   10       A/-/-/-
2001:DB8:3::3/128  GE1/0/0            FE80::3A5D:67FF:FE31:307   20       A/-/-/-
2001:DB8:10::/64   GE1/0/0            Direct                     20       D/-/L/-
2001:DB8:20::/64   GE1/0/0            FE80::3A5D:67FF:FE31:307   20       A/-/-/-  Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut, U-Up/Down Bit Set, LP-Local Prefix-SidProtect Type: L-Link Protect, N-Node Protect

3.在PE设备上配置BD模式的EVPN实例，并将相应的BD绑定到接入侧子接口

# 配置PE1。

[~PE1] evpn source-address 1.1.1.1
[*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 100
[*PE1-bd100] evpn binding vpn-instance evrf1
[*PE1-bd100] quit
[*PE1] interface gigabitethernet 2/0/0.1 mode l2
[*PE1-GigabitEthernet 2/0/0.1] encapsulation dot1q vid 1
[*PE1-GigabitEthernet 2/0/0.1] rewrite pop single
[*PE1-GigabitEthernet 2/0/0.1] bridge-domain 100
[*PE1-GigabitEthernet 2/0/0.1] quit
[*PE1] commit

# 配置PE2。

[~PE2] evpn source-address 3.3.3.3
[*PE2] evpn vpn-instance evrf1 bd-mode
[*PE2-evpn-instance-evrf1] route-distinguisher 200:1
[*PE2-evpn-instance-evrf1] vpn-target 1:1
[*PE2-evpn-instance-evrf1] quit
[*PE2] bridge-domain 100
[*PE2-bd100] evpn binding vpn-instance evrf1
[*PE2-bd100] quit
[*PE2] interface gigabitethernet 2/0/0.1 mode l2
[*PE2-GigabitEthernet 2/0/0.1] encapsulation dot1q vid 1
[*PE2-GigabitEthernet 2/0/0.1] rewrite pop single
[*PE2-GigabitEthernet 2/0/0.1] bridge-domain 100
[*PE2-GigabitEthernet 2/0/0.1] quit
[*PE2] commit

4.在PE设备之间建立BGP EVPN对等体关系

# 配置PE1。

[~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 1
[*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] commit

# 配置PE2。

[~PE2] bgp 100
[*PE2-bgp] router-id 3.3.3.3
[*PE2-bgp] peer 2001:DB8:1::1 as-number 100
[*PE2-bgp] peer 2001:DB8:1::1 connect-interface loopback 1
[*PE2-bgp] l2vpn-family evpn
[*PE2-bgp-af-evpn] peer 2001:DB8:1::1 enable
[*PE2-bgp-af-evpn] peer 2001:DB8:1::1 advertise encap-type srv6
[*PE2-bgp-af-evpn] quit
[*PE2-bgp] quit
[*PE2] commit

配置完成后，在PE设备上执行display bgp evpn peer命令，可以看到PE之间的BGP EVPN对等体关系已建立，并达到Established状态。

5.在PE设备之间建立SRv6 BE

# 配置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

# 配置PE2。

[~PE2] segment-routing ipv6
[*PE2-segment-routing-ipv6] encapsulation source-address 2001:DB8:3::3
[*PE2-segment-routing-ipv6] locator PE2 ipv6-prefix 2001:DB8:21:: 64
[*PE2-segment-routing-ipv6-locator] quit
[*PE2-segment-routing-ipv6] locator PE2_ARG ipv6-prefix 2001:DB8:22:: 64 args 10
[*PE2-segment-routing-ipv6-locator] quit
[*PE2-segment-routing-ipv6] quit
[*PE2] isis 1
[*PE2-isis-1] segment-routing ipv6 locator PE2
[*PE2-isis-1] segment-routing ipv6 locator PE2_ARG auto-sid-disable
[*PE2-isis-1] quit
[*PE2] evpn vpn-instance evrf1 bd-mode
[*PE2-evpn-instance-evrf1] segment-routing ipv6 locator PE2_ARG unicast-locator PE2
[*PE2-evpn-instance-evrf1] segment-routing ipv6 best-effort
[*PE2-evpn-instance-evrf1] quit
[*PE2] commit

6.检查配置结果

在PE上通过命令display segment-routing ipv6 local-sid { end-dt2u | end-dt2ul | end-dt2m } forwarding，查看SRv6 BE的Local SID表信息。以PE1为例：

[~PE1] display segment-routing ipv6 local-sid end-dt2m forwardingMy Local-SID End.DT2M Forwarding Table--------------------------------------
SID             : 2001:DB8:12::400/118                         FuncType : End.DT2M
Bridge-domain ID: 100
LocatorName     : PE1_ARG                                      LocatorID: 5Total SID(s): 1
[~PE1] display segment-routing ipv6 local-sid end-dt2u forwardingMy Local-SID End.DT2U Forwarding Table--------------------------------------SID             : 2001:DB8:11::3D/128                          FuncType : End.DT2U
Bridge-domain ID: 100
LocatorName     : PE1                                          LocatorID: 4Total SID(s): 1

在PE上通过配置命令display bgp evpn all routing-table，可以看到远端发来的EVPN路由。以PE1为例：

[~PE1] display bgp evpn all routing-tableLocal AS number : 100BGP Local router ID is 1.1.1.1Status codes: * - valid, > - best, d - damped, x - best external, a - add path,h - history,  i - internal, s - suppressed, S - StaleOrigin : i - IGP, e - EGP, ? - incompleteEVPN address family:Number of Inclusive Multicast Routes: 2Route Distinguisher: 100:1Network(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                                EVPN-Instance evrf1:Number of Inclusive Multicast Routes: 2Network(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

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组网需求

配置思路

操作步骤

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