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配置VXLAN构建分布式网关部署方式的虚拟网络示例（IPv6 over IPv4，BGP EVPN方式）
组网需求
企业已经建成比较成熟的园区网络，但是没有专用的数据中心网络，所有的服务器分布在不同的部门，并且不具备集中放置的条件。现在用户希望在已有园区网络上构建一个虚拟网络，需求如下：
- 将散落在不同部门的服务器构建成一个虚拟网络，实现资源整合和业务灵活部署。
- 服务器网络为IPv6网络，园区内互联网络为IPv4网络。
- 各服务器上部署着大量的VM，相同网段的服务器之间实现二层互通，不同网段的服务器之间实现三层互通。
- VXLAN三层网关下移到VXLAN接入设备，在VXLAN接入设备上使用分布式网关，优化转发路径。
- 核心设备负责园区内VXLAN网络同外界的通信。
本举例中VXLAN隧道侧接口以X系列单板为例。
数据准备
表1-16 配置BGP EVPN相关数据
设备 |
EVPN实例 |
RD值 |
BD |
VNI |
Router id |
Peer IP |
|---|---|---|---|---|---|---|
VTEP1 |
- |
- |
- |
- |
10.1.1.1 |
10.2.2.2 10.3.3.3 |
VTEP2 |
evpn10：
|
1:10 |
10 |
10 |
10.2.2.2 |
10.1.1.1 10.3.3.3 |
evpn20：
|
1:20 |
20 |
20 |
10.2.2.2 |
10.1.1.1 10.3.3.3 |
|
VTEP3 |
evpn10：
|
2:10 |
10 |
10 |
10.3.3.3 |
10.1.1.1 10.2.2.2 |
evpn20：
|
2:20 |
20 |
20 |
10.3.3.3 |
10.1.1.1 10.2.2.2 |
表1-17 配置VPN实例相关数据
设备 |
接口 |
VPN实例 |
VNI |
RD值 |
|---|---|---|---|---|
VTEP1 |
- |
vpn1：
|
100 |
1:100 |
VTEP2 |
VBDIF 10 |
vpn1：
|
100 |
2:100 |
VBDIF 20 |
||||
VTEP3 |
VBDIF 10 |
vpn1：
|
100 |
3:100 |
VBDIF 20 |
图1-69 EVPN实例同VPN实例RT交叉示意图
![]()
配置思路
采用如下思路配置不同网段用户通过VXLAN网关互通：
- 分别在VTEP1、VTEP2、VTEP3上配置路由协议，保证网络三层互通。
- 分别在VTEP2、VTEP3上配置VXLAN接入业务部署方式，在Switch2、Switch3上配置VLAN。
- 分别在VTEP2、VTEP3上配置EVPN实例并绑定BD域。
- 在VTEP1、VTEP2、VTEP3上配置VPN实例，并在VTEP2、VTEP3配置VPN实例绑定VBDIF接口。
- 分别在VTEP1、VTEP2、VTEP3之间配置的BGP EVPN对等体关系。
- 分别在VTEP1、VTEP2、VTEP3上配置VXLAN隧道。
- 分别在VTEP2、VTEP3上配置VXLAN分布式网关。
- 在VTEP1上配置缺省路由，并引入BGP。VTEP1负责园区内的用户同园区外的通信。
园区网络的三层互通是构建虚拟网络的基础条件，现网中，如果园区网络已经实现三层网络的互通，那么该举例中的步骤1可以省略。
操作步骤
- 配置路由协议
# 配置VTEP2各接口IP地址。VTEP1和VTEP3的配置与VTEP2类似，这里不再赘述。配置OSPF时，注意需要发布设备上的32位Loopback接口地址。
<HUAWEI> system-view [HUAWEI] sysname VTEP2 [VTEP2] interface loopback 1 [VTEP2-LoopBack1] ip address 10.2.2.2 32 [VTEP2-LoopBack1] quit [VTEP2] interface gigabitethernet 1/0/1 [VTEP2-GigabitEthernet1/0/1] undo portswitch [VTEP2-GigabitEthernet1/0/1] ip address 192.168.1.1 24 [VTEP2-GigabitEthernet1/0/1] quit [VTEP2] ospf router-id 10.2.2.2 [VTEP2-ospf-1] area 0 [VTEP2-ospf-1-area-0.0.0.0] network 10.2.2.2 0.0.0.0 [VTEP2-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.0.255 [VTEP2-ospf-1-area-0.0.0.0] quit [VTEP2-ospf-1] quit
# OSPF成功配置后，VTEP1、VTEP2和VTEP3之间可通过OSPF协议发现对方Loopback接口的IP地址，并能互相ping通。以VTEP2 ping VTEP3的显示为例。
[VTEP2] ping 10.3.3.3 PING 10.3.3.3: 56 data bytes, press CTRL_C to break Reply from 10.3.3.3: bytes=56 Sequence=1 ttl=253 time=240 ms Reply from 10.3.3.3: bytes=56 Sequence=2 ttl=253 time=5 ms Reply from 10.3.3.3: bytes=56 Sequence=3 ttl=253 time=5 ms Reply from 10.3.3.3: bytes=56 Sequence=4 ttl=253 time=14 ms Reply from 10.3.3.3: bytes=56 Sequence=5 ttl=253 time=5 ms --- 10.3.3.3 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 5/53/240 ms - 分别在Switch2、Switch3上进行VLAN接入的配置，在VTEP2、VTEP3上配置VXLAN业务接入点
# 配置Switch2。
<HUAWEI> system-view [HUAWEI] sysname Switch2 [Switch2] vlan batch 10 20 [Switch2] interface gigabitethernet 1/0/2 [Switch2-GigabitEthernet1/0/2] port link-type access [Switch2-GigabitEthernet1/0/2] port default vlan 10 [Switch2-GigabitEthernet1/0/2] quit [Switch2] interface gigabitethernet 1/0/3 [Switch2-GigabitEthernet1/0/3] port link-type access [Switch2-GigabitEthernet1/0/3] port default vlan 20 [Switch2-GigabitEthernet1/0/3] quit [Switch2] interface gigabitethernet 1/0/1 [Switch2-GigabitEthernet1/0/1] port link-type trunk [Switch2-GigabitEthernet1/0/1] port trunk allow-pass vlan 10 20 [Switch2-GigabitEthernet1/0/1] quit
# 配置Switch3。
<HUAWEI> system-view [HUAWEI] sysname Switch3 [Switch3] vlan batch 10 20 [Switch3] interface gigabitethernet 1/0/2 [Switch3-GigabitEthernet1/0/2] port link-type access [Switch3-GigabitEthernet1/0/2] port default vlan 10 [Switch3-GigabitEthernet1/0/2] quit [Switch3] interface gigabitethernet 1/0/3 [Switch3-GigabitEthernet1/0/3] port link-type access [Switch3-GigabitEthernet1/0/3] port default vlan 20 [Switch3-GigabitEthernet1/0/3] quit [Switch3] interface gigabitethernet 1/0/1 [Switch3-GigabitEthernet1/0/1] port link-type trunk [Switch3-GigabitEthernet1/0/1] port trunk allow-pass vlan 10 20 [Switch3-GigabitEthernet1/0/1] quit
# 配置VTEP2。
[VTEP2] bridge-domain 10 [VTEP2-bd10] quit [VTEP2] vcmp role silent [VTEP2] interface gigabitethernet 1/0/2 [VTEP2-GigabitEthernet1/0/2] port link-type trunk [VTEP2-GigabitEthernet1/0/2] quit [VTEP2] interface gigabitethernet 1/0/2.1 mode l2 [VTEP2-GigabitEthernet1/0/2.1] encapsulation dot1q vid 10 [VTEP2-GigabitEthernet1/0/2.1] bridge-domain 10 [VTEP2-GigabitEthernet1/0/2.1] quit [VTEP2] bridge-domain 20 [VTEP2-bd20] quit [VTEP2] interface gigabitethernet 1/0/2.2 mode l2 [VTEP2-GigabitEthernet1/0/2.2] encapsulation dot1q vid 20 [VTEP2-GigabitEthernet1/0/2.2] bridge-domain 20 [VTEP2-GigabitEthernet1/0/2.2] quit
# 配置VTEP3。
[VTEP3] bridge-domain 10 [VTEP3-bd10] quit [VTEP3] vcmp role silent [VTEP3] interface gigabitethernet 1/0/2 [VTEP3-GigabitEthernet1/0/2] port link-type trunk [VTEP3-GigabitEthernet1/0/2] quit [VTEP3] interface gigabitethernet 1/0/2.1 mode l2 [VTEP3-GigabitEthernet1/0/2.1] encapsulation dot1q vid 10 [VTEP3-GigabitEthernet1/0/2.1] bridge-domain 10 [VTEP3-GigabitEthernet1/0/2.1] quit [VTEP3] bridge-domain 20 [VTEP3-bd20] quit [VTEP3] interface gigabitethernet 1/0/2.2 mode l2 [VTEP3-GigabitEthernet1/0/2.2] encapsulation dot1q vid 20 [VTEP3-GigabitEthernet1/0/2.2] bridge-domain 20 [VTEP3-GigabitEthernet1/0/2.2] quit
- 分别在VTEP2、VTEP3上配置EVPN实例并绑定BD域
# 配置VTEP2。
[VTEP2] evpn vpn-instance evpn10 bd-mode [VTEP2-evpn-instance-evpn10] route-distinguisher 1:10 [VTEP2-evpn-instance-evpn10] vpn-target 10:1 both [VTEP2-evpn-instance-evpn10] vpn-target 1:100 export-extcommunity [VTEP2-evpn-instance-evpn10] quit [VTEP2] bridge-domain 10 [VTEP2-bd10] vxlan vni 10 [VTEP2-bd10] evpn binding vpn-instance evpn10 [VTEP2-bd10] quit [VTEP2] evpn vpn-instance evpn20 bd-mode [VTEP2-evpn-instance-evpn20] route-distinguisher 1:20 [VTEP2-evpn-instance-evpn20] vpn-target 20:1 both [VTEP2-evpn-instance-evpn20] vpn-target 1:100 export-extcommunity [VTEP2-evpn-instance-evpn20] quit [VTEP2] bridge-domain 20 [VTEP2-bd20] vxlan vni 20 [VTEP2-bd20] evpn binding vpn-instance evpn20 [VTEP2-bd20] quit
# 配置VTEP3。
[VTEP3] evpn vpn-instance evpn10 bd-mode [VTEP3-evpn-instance-evpn10] route-distinguisher 2:10 [VTEP3-evpn-instance-evpn10] vpn-target 10:1 both [VTEP3-evpn-instance-evpn10] vpn-target 1:100 export-extcommunity [VTEP3-evpn-instance-evpn10] quit [VTEP3] bridge-domain 10 [VTEP3-bd10] vxlan vni 10 [VTEP3-bd10] evpn binding vpn-instance evpn10 [VTEP3-bd10] quit [VTEP3] evpn vpn-instance evpn20 bd-mode [VTEP3-evpn-instance-evpn20] route-distinguisher 2:20 [VTEP3-evpn-instance-evpn20] vpn-target 20:1 both [VTEP3-evpn-instance-evpn20] vpn-target 1:100 export-extcommunity [VTEP3-evpn-instance-evpn20] quit [VTEP3] bridge-domain 20 [VTEP3-bd20] vxlan vni 20 [VTEP3-bd20] evpn binding vpn-instance evpn20 [VTEP3-bd20] quit
- 在VTEP1、VTEP2、VTEP3上配置VPN实例，并在VTEP2、VTEP3配置VPN实例绑定VBDIF接口
# 配置VTEP1。
[VTEP1] ip vpn-instance vpn1 [VTEP1-vpn-instance-vpn1] ipv6-family [VTEP1-vpn-instance-vpn1-af-ipv6] route-distinguisher 1:100 [VTEP1-vpn-instance-vpn1-af-ipv6] vpn-target 1:100 both evpn [VTEP1-vpn-instance-vpn1-af-ipv6] quit [VTEP1-vpn-instance-vpn1] vxlan vni 100 [VTEP1-vpn-instance-vpn1] quit
# 配置VTEP2。
[VTEP2] ip vpn-instance vpn1 [VTEP2-vpn-instance-vpn1] ipv6-family [VTEP2-vpn-instance-vpn1-af-ipv6] route-distinguisher 2:100 [VTEP2-vpn-instance-vpn1-af-ipv6] vpn-target 1:100 both evpn [VTEP2-vpn-instance-vpn1-af-ipv6] quit [VTEP2-vpn-instance-vpn1] vxlan vni 100 [VTEP2-vpn-instance-vpn1] quit [VTEP2] interface vbdif 10 [VTEP2-Vbdif10] ip binding vpn-instance vpn1 [VTEP2-Vbdif10] quit [VTEP2] interface vbdif 20 [VTEP2-Vbdif20] ip binding vpn-instance vpn1 [VTEP2-Vbdif20] quit
# 配置VTEP3。
[VTEP3] ip vpn-instance vpn1 [VTEP3-vpn-instance-vpn1] ipv6-family [VTEP3-vpn-instance-vpn1-af-ipv6] route-distinguisher 3:100 [VTEP3-vpn-instance-vpn1-af-ipv6] vpn-target 1:100 both evpn [VTEP3-vpn-instance-vpn1-af-ipv6] quit [VTEP3-vpn-instance-vpn1] vxlan vni 100 [VTEP3-vpn-instance-vpn1] quit [VTEP3] interface vbdif 10 [VTEP3-Vbdif10] ip binding vpn-instance vpn1 [VTEP3-Vbdif10] quit [VTEP3] interface vbdif 20 [VTEP3-Vbdif20] ip binding vpn-instance vpn1 [VTEP3-Vbdif20] quit
- 配置VTEP1、VTEP2、VTEP3之间的BGP EVPN对等体关系
# 配置VTEP1。
[VTEP1] bgp 100 [VTEP1-bgp] router-id 10.1.1.1 [VTEP1-bgp] peer 10.2.2.2 as-number 100 [VTEP1-bgp] peer 10.2.2.2 connect-interface LoopBack1 [VTEP1-bgp] peer 10.3.3.3 as-number 100 [VTEP1-bgp] peer 10.3.3.3 connect-interface LoopBack1 [VTEP1-bgp] l2vpn-family evpn [VTEP1-bgp-af-evpn] peer 10.2.2.2 enable [VTEP1-bgp-af-evpn] peer 10.2.2.2 advertise irbv6 [VTEP1-bgp-af-evpn] peer 10.3.3.3 enable [VTEP1-bgp-af-evpn] peer 10.3.3.3 advertise irbv6 [VTEP1-bgp-af-evpn] quit [VTEP1-bgp] ipv6-family vpn-instance vpn1 [VTEP1-bgp-vpn1] advertise l2vpn evpn [VTEP1-bgp-vpn1] import-route direct [VTEP1-bgp-vpn1] quit [VTEP1-bgp] quit
# 配置VTEP2。
[VTEP2] bgp 100 [VTEP2-bgp] router-id 10.2.2.2 [VTEP2-bgp] peer 10.1.1.1 as-number 100 [VTEP2-bgp] peer 10.1.1.1 connect-interface LoopBack1 [VTEP2-bgp] peer 10.3.3.3 as-number 100 [VTEP2-bgp] peer 10.3.3.3 connect-interface LoopBack1 [VTEP2-bgp] l2vpn-family evpn [VTEP2-bgp-af-evpn] peer 10.1.1.1 enable [VTEP2-bgp-af-evpn] peer 10.1.1.1 advertise irbv6 [VTEP2-bgp-af-evpn] peer 10.3.3.3 enable [VTEP2-bgp-af-evpn] peer 10.3.3.3 advertise irbv6 [VTEP2-bgp-af-evpn] quit [VTEP2-bgp] ipv6-family vpn-instance vpn1 [VTEP2-bgp-vpn1] advertise l2vpn evpn [VTEP2-bgp-vpn1] import-route direct [VTEP2-bgp-vpn1] quit [VTEP2-bgp] quit
# 配置VTEP3。
[VTEP3] bgp 100 [VTEP3-bgp] router-id 10.3.3.3 [VTEP3-bgp] peer 10.1.1.1 as-number 100 [VTEP3-bgp] peer 10.1.1.1 connect-interface LoopBack1 [VTEP3-bgp] peer 10.2.2.2 as-number 100 [VTEP3-bgp] peer 10.2.2.2 connect-interface LoopBack1 [VTEP3-bgp] l2vpn-family evpn [VTEP3-bgp-af-evpn] peer 10.1.1.1 enable [VTEP3-bgp-af-evpn] peer 10.1.1.1 advertise irbv6 [VTEP3-bgp-af-evpn] peer 10.2.2.2 enable [VTEP3-bgp-af-evpn] peer 10.2.2.2 advertise irbv6 [VTEP3-bgp-af-evpn] quit [VTEP3-bgp] ipv6-family vpn-instance vpn1 [VTEP3-bgp-vpn1] advertise l2vpn evpn [VTEP3-bgp-vpn1] import-route direct [VTEP3-bgp-vpn1] quit [VTEP3-bgp] quit
- 在VTEP1、VTEP2、VTEP3上配置VXLAN隧道
# 配置VTEP1。
[VTEP1] interface nve 1 [VTEP1-Nve1] source 10.1.1.1 [VTEP1-Nve1] quit
# 配置VTEP2。
[VTEP2] interface nve 1 [VTEP2-Nve1] source 10.2.2.2 [VTEP2-Nve1] vni 10 head-end peer-list protocol bgp [VTEP2-Nve1] vni 20 head-end peer-list protocol bgp [VTEP2-Nve1] quit
# 配置VTEP3。
[VTEP3] interface nve 1 [VTEP3-Nve1] source 10.3.3.3 [VTEP3-Nve1] vni 10 head-end peer-list protocol bgp [VTEP3-Nve1] vni 20 head-end peer-list protocol bgp [VTEP3-Nve1] quit
- 在VTEP2、VTEP3上配置VXLAN分布式网关
# 配置VTEP2。
[VTEP2] ipv6 [VTEP2] interface vbdif 10 [VTEP2-Vbdif10] ipv6 enable [VTEP2-Vbdif10] ipv6 address fc00:1::1 64 [VTEP2-Vbdif10] ipv6 nd distribute-gateway enable [VTEP2-Vbdif10] ipv6 nd collect host enable [VTEP2-Vbdif10] mac-address 0000-5e00-0101 [VTEP2-Vbdif10] quit [VTEP2] interface vbdif 20 [VTEP2-Vbdif20] ipv6 enable [VTEP2-Vbdif20] ipv6 address fc00:2::1 64 [VTEP2-Vbdif20] ipv6 nd distribute-gateway enable [VTEP2-Vbdif20] ipv6 nd collect host enable [VTEP2-Vbdif20] mac-address 0000-5e00-0102 [VTEP2-Vbdif20] quit
# 配置VTEP3。
[VTEP3] ipv6 [VTEP3] interface vbdif 10 [VTEP3-Vbdif10] ipv6 enable [VTEP3-Vbdif10] ipv6 address fc00:1::1 64 [VTEP3-Vbdif10] ipv6 nd distribute-gateway enable [VTEP3-Vbdif10] ipv6 nd collect host enable [VTEP3-Vbdif10] mac-address 0000-5e00-0101 [VTEP3-Vbdif10] quit [VTEP3] interface vbdif 20 [VTEP3-Vbdif20] ipv6 enable [VTEP3-Vbdif20] ipv6 address fc00:2::1 64 [VTEP3-Vbdif20] ipv6 nd distribute-gateway enable [VTEP3-Vbdif20] ipv6 nd collect host enable [VTEP3-Vbdif20] mac-address 0000-5e00-0102 [VTEP3-Vbdif20] quit
- 在VTEP1配置缺省路由，并引入BGP
# 配置VTEP1。
[VTEP1] ipv6 [VTEP1] ipv6 route-static vpn-instance vpn1 :: 0 NULL0 [VTEP1] bgp 100 [VTEP1-bgp] ipv6-family vpn-instance vpn1 [VTEP1-bgp6-vpn1] import-route static [VTEP1-bgp6-vpn1] default-route imported [VTEP1-bgp6-vpn1] quit [VTEP1-bgp] quit
- 验证配置结果
# 上述配置成功后，在VTEP1、VTEP2、VTEP3上执行命令display vxlan vni可查看到VNI的状态是Up；执行命令display vxlan tunnel可查看到VXLAN隧道的信息。以VTEP2显示为例。
[VTEP2] display vxlan vni VNI BD-ID State ----------------------------------------- 10 10 up 20 20 up ----------------------------------------- Number of vxlan vni bound to BD is : 2 VNI VRF-ID ----------------------------------------- 100 1 ----------------------------------------- Number of vxlan vni bound to VPN is : 1
[VTEP2] display vxlan tunnel Tunnel ID Source Destination State Type -------------------------------------------------------------------------------------------------------------------- 4026531841 10.2.2.2 10.3.3.3 up l2 dynamic 1 10.2.2.2 10.1.1.1 up l3 dynamic 2 10.2.2.2 10.3.3.3 up l3 dynamic -------------------------------------------------------------------------------------------------------------------- Number of vxlan tunnel : Total : 3 Static: 0 L2 dynamic: 1 L3 dynamic: 2
# 配置完成后，相同网段用户之间可以二层互通。以Server1上的VM1 ping Server3上的VM1的显示为例。
C:\Users\VM1>ping fc00:1::3 PING fc00:1::3 : 56 data bytes, press CTRL_C to break Reply from fc00:1::3 bytes=56 Sequence=1 hop limit=63 time = 4 ms Reply from fc00:1::3 bytes=56 Sequence=2 hop limit=63 time = 4 ms Reply from fc00:1::3 bytes=56 Sequence=3 hop limit=63 time = 5 ms Reply from fc00:1::3 bytes=56 Sequence=4 hop limit=63 time = 4 ms Reply from fc00:1::3 bytes=56 Sequence=5 hop limit=63 time = 4 ms --- fc00:1::3 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 4/4/5 ms# 不同网段用户之间可以三层互通。以Server1上的VM1 ping Server4上的VM1的显示为例。
C:\Users\VM1>ping fc00:2::3 PING fc00:2::3 : 56 data bytes, press CTRL_C to break Reply from FC00:2::3 bytes=56 Sequence=1 hop limit=63 time = 4 ms Reply from FC00:2::3 bytes=56 Sequence=2 hop limit=63 time = 4 ms Reply from FC00:2::3 bytes=56 Sequence=3 hop limit=63 time = 5 ms Reply from FC00:2::3 bytes=56 Sequence=4 hop limit=63 time = 4 ms Reply from FC00:2::3 bytes=56 Sequence=5 hop limit=63 time = 4 ms --- fc00:2::3 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 4/4/5 ms - 验证虚拟机迁移结果
以Server1上的VM1（IP地址：FC00:1::2）迁移到Server3为例，比对迁移前后VTEP2和VTEP3的ND表项，以及迁移前后VTEP1的路由表来验证迁移结果。
迁移前：
# 查看VTEP1上VPN实例vpn1的路由表。
[VTEP1] display ipv6 routing-table vpn-instance vpn1 Routing Table : vpn1 Destinations : 7 Routes : 7 Destination : :: PrefixLength : 0 NextHop : :: Preference : 60 Cost : 0 Protocol : Static RelayNextHop : :: TunnelID : 0x0 Interface : NULL0 Flags : D Destination : FC00:1:: PrefixLength : 64 NextHop : ::FFFF:10.2.2.2 Preference : 255 Cost : 0 Protocol : IBGP RelayNextHop : ::FFFF:0.0.0.0 TunnelID : 0x2 Interface : VXLAN Flags : RD Destination : FC00:1::2 PrefixLength : 128 NextHop : ::FFFF:10.2.2.2 Preference : 255 Cost : 0 Protocol : IBGP RelayNextHop : ::FFFF:0.0.0.0 TunnelID : 0x2 Interface : VXLAN Flags : RD Destination : FC00:1::3 PrefixLength : 128 NextHop : ::FFFF:10.3.3.3 Preference : 255 Cost : 0 Protocol : IBGP RelayNextHop : ::FFFF:0.0.0.0 TunnelID : 0x1 Interface : VXLAN Flags : RD Destination : FC00:2:: PrefixLength : 64 NextHop : ::FFFF:10.2.2.2 Preference : 255 Cost : 0 Protocol : IBGP RelayNextHop : ::FFFF:0.0.0.0 TunnelID : 0x2 Interface : VXLAN Flags : RD Destination : FC00:2::2 PrefixLength : 128 NextHop : ::FFFF:10.2.2.2 Preference : 255 Cost : 0 Protocol : IBGP RelayNextHop : ::FFFF:0.0.0.0 TunnelID : 0x2 Interface : VXLAN Flags : RD Destination : FC00:2::3 PrefixLength : 128 NextHop : ::FFFF:10.3.3.3 Preference : 255 Cost : 0 Protocol : IBGP RelayNextHop : ::FFFF:0.0.0.0 TunnelID : 0x1 Interface : VXLAN Flags : RD
# 查看VTEP2上VPN实例vpn1的ND表。
[VTEP2] display ipv6 neighbors vpn-instance vpn1 ----------------------------------------------------------------------------- IPv6 Address : FC00:1::2 Link-layer : 2cab-0098-15db State : STALE Interface : GE1/0/2.1 Age : 00h01m04s VLAN : 10 CEVLAN: - VPN name : vpn1 Is Router: TRUE Bridge-domain: 10 IPv6 Address : FE80::2EAB:FF:FE98:15DB Link-layer : 2cab-0098-15db State : STALE Interface : GE1/0/2.1 Age : 00h01m53s VLAN : 10 CEVLAN: - VPN name : vpn1 Is Router: TRUE Bridge-domain: 10 IPv6 Address : FC00:2::2 Link-layer : 2cab-0098-15d6 State : STALE Interface : GE1/0/2.2 Age : 00h01m47s VLAN : 20 CEVLAN: - VPN name : vpn1 Is Router: TRUE Bridge-domain: 20 IPv6 Address : FE80::2EAB:FF:FE98:15D6 Link-layer : 2cab-0098-15d6 State : STALE Interface : GE1/0/2.2 Age : 00h01m49s VLAN : 20 CEVLAN: - VPN name : vpn1 Is Router: TRUE Bridge-domain: 20 ----------------------------------------------------------------------------- Total: 4 Dynamic: 4 Static: 0
# 查看VTEP3上VPN实例vpn1的ND表。
[VTEP3] display ipv6 neighbors vpn-instance vpn1 ----------------------------------------------------------------------------- IPv6 Address : FC00:1::3 Link-layer : 000b-099d-eb3b State : STALE Interface : GE1/0/2.1 Age : 00h01m44s VLAN : 10 CEVLAN: - VPN name : vpn1 Is Router: TRUE Bridge-domain: 10 IPv6 Address : FE80::20B:9FF:FE9D:EB3B Link-layer : 000b-099d-eb3b State : STALE Interface : GE1/0/2.1 Age : 00h07m19s VLAN : 10 CEVLAN: - VPN name : vpn1 Is Router: TRUE Bridge-domain: 10 IPv6 Address : FC00:2::3 Link-layer : 000b-099d-fb3b State : STALE Interface : GE1/0/2.2 Age : 00h02m33s VLAN : 20 CEVLAN: - VPN name : vpn1 Is Router: TRUE Bridge-domain: 20 IPv6 Address : FE80::20B:9FF:FE9D:FB3B Link-layer : 000b-099d-fb3b State : STALE Interface : GE1/0/2.2 Age : 00h02m35s VLAN : 20 CEVLAN: - VPN name : vpn1 Is Router: TRUE Bridge-domain: 20 ----------------------------------------------------------------------------- Total: 4 Dynamic: 4 Static: 0
迁移后：
# 查看VTEP1上VPN实例vpn1的路由表。
[VTEP1] display ipv6 routing-table vpn-instance vpn1 Routing Table : vpn1 Destinations : 7 Routes : 7 Destination : :: PrefixLength : 0 NextHop : :: Preference : 60 Cost : 0 Protocol : Static RelayNextHop : :: TunnelID : 0x0 Interface : NULL0 Flags : D Destination : FC00:1:: PrefixLength : 64 NextHop : ::FFFF:10.2.2.2 Preference : 255 Cost : 0 Protocol : IBGP RelayNextHop : ::FFFF:0.0.0.0 TunnelID : 0x2 Interface : VXLAN Flags : RD Destination : FC00:1::2 PrefixLength : 128 NextHop : ::FFFF:10.3.3.3 Preference : 255 Cost : 0 Protocol : IBGP RelayNextHop : ::FFFF:0.0.0.0 TunnelID : 0x1 Interface : VXLAN Flags : RD Destination : FC00:1::3 PrefixLength : 128 NextHop : ::FFFF:10.3.3.3 Preference : 255 Cost : 0 Protocol : IBGP RelayNextHop : ::FFFF:0.0.0.0 TunnelID : 0x1 Interface : VXLAN Flags : RD Destination : FC00:2:: PrefixLength : 64 NextHop : ::FFFF:10.2.2.2 Preference : 255 Cost : 0 Protocol : IBGP RelayNextHop : ::FFFF:0.0.0.0 TunnelID : 0x2 Interface : VXLAN Flags : RD Destination : FC00:2::2 PrefixLength : 128 NextHop : ::FFFF:10.2.2.2 Preference : 255 Cost : 0 Protocol : IBGP RelayNextHop : ::FFFF:0.0.0.0 TunnelID : 0x2 Interface : VXLAN Flags : RD Destination : FC00:2::3 PrefixLength : 128 NextHop : ::FFFF:10.3.3.3 Preference : 255 Cost : 0 Protocol : IBGP RelayNextHop : ::FFFF:0.0.0.0 TunnelID : 0x1 Interface : VXLAN Flags : RD
# 查看VTEP2上VPN实例vpn1的ND表。
[VTEP2] display ipv6 neighbors vpn-instance vpn1 ----------------------------------------------------------------------------- IPv6 Address : FC00:2::2 Link-layer : 2cab-0098-15d6 State : STALE Interface : GE1/0/2.2 Age : 00h11m34s VLAN : 20 CEVLAN: - VPN name : vpn1 Is Router: TRUE Bridge-domain: 20 IPv6 Address : FE80::2EAB:FF:FE98:15D6 Link-layer : 2cab-0098-15d6 State : STALE Interface : GE1/0/2.2 Age : 00h11m36s VLAN : 20 CEVLAN: - VPN name : vpn1 Is Router: TRUE Bridge-domain: 20 ----------------------------------------------------------------------------- Total: 2 Dynamic: 2 Static: 0
# 查看VTEP3上VPN实例vpn1的ND表。
[VTEP3] display ipv6 neighbors vpn-instance vpn1 ----------------------------------------------------------------------------- IPv6 Address : FC00:1::2 Link-layer : 0487-ea01-0506 State : STALE Interface : GE1/0/2.1 Age : 00h15m49s VLAN : 10 CEVLAN: - VPN name : vpn1 Is Router: TRUE Bridge-domain: 10 IPv6 Address : FE80::687:EAFF:FE01:506 Link-layer : 0487-ea01-0506 State : REACH Interface : GE1/0/2.1 Age : 00h00m16s VLAN : 10 CEVLAN: - VPN name : vpn1 Is Router: TRUE Bridge-domain: 10 IPv6 Address : FC00:1::3 Link-layer : 000b-099d-eb3b State : STALE Interface : GE1/0/2.1 Age : 00h11m25s VLAN : 10 CEVLAN: - VPN name : vpn1 Is Router: TRUE Bridge-domain: 10 IPv6 Address : FE80::20B:9FF:FE9D:EB3B Link-layer : 000b-099d-eb3b State : STALE Interface : GE1/0/2.1 Age : 00h17m00s VLAN : 10 CEVLAN: - VPN name : vpn1 Is Router: TRUE Bridge-domain: 10 IPv6 Address : FC00:2::3 Link-layer : 000b-099d-fb3b State : STALE Interface : GE1/0/2.2 Age : 00h12m17s VLAN : 20 CEVLAN: - VPN name : vpn1 Is Router: TRUE Bridge-domain: 20 IPv6 Address : FE80::20B:9FF:FE9D:FB3B Link-layer : 000b-099d-fb3b State : STALE Interface : GE1/0/2.2 Age : 00h12m19s VLAN : 20 CEVLAN: - VPN name : vpn1 Is Router: TRUE Bridge-domain: 20 ----------------------------------------------------------------------------- Total: 6 Dynamic: 6 Static: 0
通过对比查看迁移前后VTEP2和VTEP3的ND表项，以及迁移前后VTEP1的路由表，可以发现迁移后虚拟机在VTEP2的ND表项被删除，并被VTEP3重新获得，VTEP1关于虚拟机的主机路由也从VTEP2切换到VTEP3，保证了迁移后网络的互通。
配置文件
VTEP1的配置文件
# sysname VTEP1 # ipv6 # ip vpn-instance vpn1 ipv6-family route-distinguisher 1:100 vpn-target 1:100 export-extcommunity evpn vpn-target 1:100 import-extcommunity evpn vxlan vni 100 # interface GigabitEthernet1/0/1 undo portswitch ip address 192.168.1.2 255.255.255.0 # interface GigabitEthernet1/0/2 undo portswitch ip address 192.168.2.1 255.255.255.0 # interface LoopBack1 ip address 10.1.1.1 255.255.255.255 # interface Nve1 source 10.1.1.1 # bgp 100 router-id 10.1.1.1 peer 10.2.2.2 as-number 100 peer 10.2.2.2 connect-interface LoopBack1 peer 10.3.3.3 as-number 100 peer 10.3.3.3 connect-interface LoopBack1 # ipv4-family unicast undo synchronization default-route imported import-route direct import-route static peer 10.2.2.2 enable peer 10.3.3.3 enable # l2vpn-family evpn policy vpn-target peer 10.2.2.2 enable peer 10.2.2.2 advertise irbv6 peer 10.3.3.3 enable peer 10.3.3.3 advertise irbv6 # ipv6-family vpn-instance vpn1 default-route imported import-route direct import-route static advertise l2vpn evpn # ospf 1 router-id 10.1.1.1 area 0.0.0.0 network 10.1.1.1 0.0.0.0 network 192.168.1.0 0.0.0.255 network 192.168.2.0 0.0.0.255 # ipv6 route-static vpn-instance vpn1 :: 0 NULL0 # return
VTEP2的配置文件
# sysname VTEP2 # ipv6 # vcmp role silent # ip vpn-instance vpn1 ipv6-family route-distinguisher 2:100 vpn-target 1:100 export-extcommunity evpn vpn-target 1:100 import-extcommunity evpn vxlan vni 100 # evpn vpn-instance evpn10 bd-mode route-distinguisher 1:10 vpn-target 1:100 10:1 export-extcommunity vpn-target 10:1 import-extcommunity # evpn vpn-instance evpn20 bd-mode route-distinguisher 1:20 vpn-target 1:100 20:1 export-extcommunity vpn-target 20:1 import-extcommunity # bridge-domain 10 vxlan vni 10 evpn binding vpn-instance evpn10 bridge-domain 20 vxlan vni 20 evpn binding vpn-instance evpn20 # interface GigabitEthernet1/0/1 undo portswitch ip address 192.168.1.1 255.255.255.0 # interface GigabitEthernet1/0/2 port link-type trunk # interface GigabitEthernet1/0/2.1 mode l2 encapsulation dot1q vid 10 bridge-domain 10 # interface GigabitEthernet1/0/2.2 mode l2 encapsulation dot1q vid 20 bridge-domain 20 # interface LoopBack1 ip address 10.2.2.2 255.255.255.255 # interface Vbdif10 mac-address 0000-5e00-0101 ip binding vpn-instance vpn1 ipv6 enable ipv6 address FC00:1::1/64 ipv6 nd collect host enable ipv6 nd distribute-gateway enable # interface Vbdif20 mac-address 0000-5e00-0102 ip binding vpn-instance vpn1 ipv6 enable ipv6 address FC00:2::1/64 ipv6 nd collect host enable ipv6 nd distribute-gateway enable # interface Nve1 source 10.2.2.2 vni 10 head-end peer-list protocol bgp vni 20 head-end peer-list protocol bgp # bgp 100 router-id 10.2.2.2 peer 10.1.1.1 as-number 100 peer 10.1.1.1 connect-interface LoopBack1 peer 10.3.3.3 as-number 100 peer 10.3.3.3 connect-interface LoopBack1 # ipv4-family unicast undo synchronization peer 10.1.1.1 enable peer 10.3.3.3 enable # l2vpn-family evpn policy vpn-target peer 10.1.1.1 enable peer 10.1.1.1 advertise irbv6 peer 10.3.3.3 enable peer 10.3.3.3 advertise irbv6 # ipv6-family vpn-instance vpn1 import-route direct advertise l2vpn evpn # ospf 1 router-id 10.2.2.2 area 0.0.0.0 network 10.2.2.2 0.0.0.0 network 192.168.1.0 0.0.0.255 # return
VTEP3的配置文件
# sysname VTEP3 # ipv6 # vcmp role silent # ip vpn-instance vpn1 ipv6-family route-distinguisher 3:100 vpn-target 1:100 export-extcommunity evpn vpn-target 1:100 import-extcommunity evpn vxlan vni 100 # evpn vpn-instance evpn10 bd-mode route-distinguisher 2:10 vpn-target 1:100 10:1 export-extcommunity vpn-target 10:1 import-extcommunity # evpn vpn-instance evpn20 bd-mode route-distinguisher 2:20 vpn-target 1:100 20:1 export-extcommunity vpn-target 20:1 import-extcommunity # bridge-domain 10 vxlan vni 10 evpn binding vpn-instance evpn10 bridge-domain 20 vxlan vni 20 evpn binding vpn-instance evpn20 # interface GigabitEthernet1/0/1 undo portswitch ip address 192.168.2.2 255.255.255.0 # interface GigabitEthernet1/0/2 port link-type trunk # interface GigabitEthernet1/0/2.1 mode l2 encapsulation dot1q vid 10 bridge-domain 10 # interface GigabitEthernet1/0/2.2 mode l2 encapsulation dot1q vid 20 bridge-domain 20 # interface LoopBack1 ip address 10.3.3.3 255.255.255.255 # interface Vbdif10 mac-address 0000-5e00-0101 ip binding vpn-instance vpn1 ipv6 enable ipv6 address FC00:1::1/64 ipv6 nd collect host enable ipv6 nd distribute-gateway enable # interface Vbdif20 mac-address 0000-5e00-0102 ip binding vpn-instance vpn1 ipv6 enable ipv6 address FC00:2::1/64 ipv6 nd collect host enable ipv6 nd distribute-gateway enable # interface Nve1 source 10.3.3.3 vni 10 head-end peer-list protocol bgp vni 20 head-end peer-list protocol bgp # bgp 100 router-id 10.3.3.3 peer 10.1.1.1 as-number 100 peer 10.1.1.1 connect-interface LoopBack1 peer 10.2.2.2 as-number 100 peer 10.2.2.2 connect-interface LoopBack1 # ipv4-family unicast undo synchronization peer 10.1.1.1 enable peer 10.2.2.2 enable # l2vpn-family evpn policy vpn-target peer 10.1.1.1 enable peer 10.1.1.1 advertise irbv6 peer 10.2.2.2 enable peer 10.2.2.2 advertise irbv6 # ipv6-family vpn-instance vpn1 import-route direct advertise l2vpn evpn # ospf 1 router-id 10.3.3.3 area 0.0.0.0 network 10.3.3.3 0.0.0.0 network 192.168.2.0 0.0.0.255 # return
Switch2的配置文件
# sysname Switch2 # vlan batch 10 20 # interface GigabitEthernet1/0/1 port link-type trunk port trunk allow-pass vlan 10 20 # interface GigabitEthernet1/0/2 port link-type access port default vlan 10 # interface GigabitEthernet1/0/3 port link-type access port default vlan 20 # return
Switch3的配置文件
# sysname Switch3 # vlan batch 10 20 # interface GigabitEthernet1/0/1 port link-type trunk port trunk allow-pass vlan 10 20 # interface GigabitEthernet1/0/2 port link-type access port default vlan 10 # interface GigabitEthernet1/0/3 port link-type access port default vlan 20 # return
