华为路由器实验指导 | 配置L3VdPdNdv4 over SRv6 BE Flex-Algo
Posted COCOgsta
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了华为路由器实验指导 | 配置L3VdPdNdv4 over SRv6 BE Flex-Algo相关的知识，希望对你有一定的参考价值。
素材来源：《华为NetEngine40E用户手册》
组网需求
如图1所示：
-
路由器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网络互连的目的。
-
PE1、P和PE2属于IS-IS进程1，都是Level-1设备。
要求在PE1和PE2之间建立双向SRv6 BE路径，承载L3VPNv4业务。同时由于公网PE之间存在多条链路，要求数据流量在指定链路PE1-P1-PE2上进行转发。
本例通过定义亲和属性，来支持vpna的业务需求。
配置思路
-
使能PE1、P1、PE2和P2各接口的IPv6转发能力，配置各接口的IPv6地址。
-
在PE1、P1、PE2和P2上使能IS-IS，配置Level级别，指定网络实体。
- 配置Flex-Algo链路属性。
- 配置Flex-Algo算法定义。
- 使能IS-IS发布灵活算法能力，使能IS-IS进程的TE特性。
-
在PE1和PE2上配置VPN实例。
-
在PE和CE之间建立EBGP对等体关系。
-
在PE之间建立MP-IBGP对等体关系。
- 在PE之间建立基于Flex-Algo的SRv6 BE路径。
操作步骤
1. 使能各接口的IPv6转发能力，配置IPv6地址，以PE1为例，其他路由器的配置过程相同，不再赘述
<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:db8:1::1 96
[*PE1-GigabitEthernet1/0/0] quit
[*PE1] interface gigabitethernet 3/0/0
[*PE1-GigabitEthernet3/0/0] ipv6 enable
[*PE1-GigabitEthernet3/0/0] ipv6 address 2001:db8:3::1 96
[*PE1-GigabitEthernet3/0/0] quit
[*PE1] interface LoopBack 1
[*PE1-LoopBack1] ipv6 enable
[*PE1-LoopBack1] ipv6 address 1::1 128
[*PE1-LoopBack1] quit
[*PE1] commit2. 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 gigabitethernet 3/0/0
[*PE1-GigabitEthernet3/0/0] isis ipv6 enable 1
[*PE1-GigabitEthernet3/0/0] quit
[*PE1] interface loopback1
[*PE1-LoopBack1] isis ipv6 enable 1
[*PE1-LoopBack1] commit
[~PE1-LoopBack1] quit# 配置P1。
[~P1] isis 1
[*P1-isis-1] is-level level-1
[*P1-isis-1] cost-style wide
[*P1-isis-1] network-entity 10.0000.0000.0002.00
[*P1-isis-1] ipv6 enable topology ipv6
[*P1-isis-1] quit
[*P1] interface gigabitethernet 1/0/0
[*P1-GigabitEthernet1/0/0] isis ipv6 enable 1
[*P1-GigabitEthernet1/0/0] quit
[*P1] interface gigabitethernet 2/0/0
[*P1-GigabitEthernet2/0/0] isis ipv6 enable 1
[*P1-GigabitEthernet2/0/0] quit
[*P1] interface loopback1
[*P1-LoopBack1] isis ipv6 enable 1
[*P1-LoopBack1] commit
[~P1-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 gigabitethernet 3/0/0
[*PE2-GigabitEthernet3/0/0] isis ipv6 enable 1
[*PE2-GigabitEthernet3/0/0] quit
[*PE2] interface loopback1
[*PE2-LoopBack1] isis ipv6 enable 1
[*PE2-LoopBack1] commit
[~PE2-LoopBack1] quit# 配置P2。
[~P2] isis 1
[*P2-isis-1] is-level level-1
[*P2-isis-1] cost-style wide
[*P2-isis-1] network-entity 10.0000.0000.0004.00
[*P2-isis-1] ipv6 enable topology ipv6
[*P2-isis-1] quit
[*P2] interface gigabitethernet 1/0/0
[*P2-GigabitEthernet1/0/0] isis ipv6 enable 1
[*P2-GigabitEthernet1/0/0] quit
[*P2] interface gigabitethernet 2/0/0
[*P2-GigabitEthernet2/0/0] isis ipv6 enable 1
[*P2-GigabitEthernet2/0/0] quit
[*P2] interface loopback1
[*P2-LoopBack1] isis ipv6 enable 1
[*P2-LoopBack1] commit
[~P2-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 peer
Peer information for ISIS(1)
System Id Interface Circuit Id State HoldTime Type PRI
--------------------------------------------------------------------------------
0000.0000.0002* GE1/0/0 0000.0000.0002.01 Up 6s L1 64
0000.0000.0004* GE3/0/0 0000.0000.0004.01 Up 9s L1 64
Total Peer(s): 2 # 显示IS-IS路由表信息。以PE1为例。
[~PE1] display isis route
Route information for ISIS(1)
-----------------------------
ISIS(1) Level-1 Forwarding Table
--------------------------------
IPV6 Dest. ExitInterface NextHop Cost Flags
--------------------------------------------------------------------------------
1::1/128 Loop1 Direct 0 D/-/L/-
2::2/128 GE1/0/0 FE80::3A5D:67FF:FE31:307 10 A/-/-/-
3::3/128 GE1/0/0 FE80::3A5D:67FF:FE31:307 20 A/-/-/-
GE3/0/0 FE80::3A5D:67FF:FE41:305
4::4/128 GE3/0/0 FE80::3A5D:67FF:FE41:305 10 A/-/-/-
2001:DB8:1::/96 GE1/0/0 Direct 10 D/-/L/-
2001:DB8:2::/96 GE1/0/0 FE80::3A5D:67FF:FE31:307 20 A/-/-/-
2001:DB8:3::/96 GE3/0/0 Direct 10 D/-/L/-
2001:DB8:4::/96 GE3/0/0 FE80::3A5D:67FF:FE41:305 20 A/-/-/-
Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,
U-Up/Down Bit Set, LP-Local Prefix-Sid
Protect Type: L-Link Protect, N-Node Protect 3. 配置Flex-Algo链路属性
# 配置PE1。
[~PE1] te attribute enable
[*PE1] path-constraint affinity-mapping
[*PE1-pc-af-map] attribute green bit-sequence 1
[*PE1-pc-af-map] attribute red bit-sequence 9
[*PE1-pc-af-map] quit
[*PE1] interface gigabitethernet1/0/0
[*PE1-GigabitEthernet1/0/0] te link-attribute-application flex-algo
[*PE1-GigabitEthernet1/0/0-te-link-attribute-application] link administrative group name green
[*PE1-GigabitEthernet1/0/0-te-link-attribute-application] quit
[*PE1-GigabitEthernet1/0/0] quit
[*PE1] interface gigabitethernet3/0/0
[*PE1-GigabitEthernet3/0/0] te link-attribute-application flex-algo
[*PE1-GigabitEthernet3/0/0-te-link-attribute-application] link administrative group name red
[*PE1-GigabitEthernet3/0/0-te-link-attribute-application] quit
[*PE1-GigabitEthernet3/0/0] quit
[*PE1] commit# 配置P1。
[~P1] te attribute enable
[*P1] path-constraint affinity-mapping
[*P1-pc-af-map] attribute green bit-sequence 1
[*P1-pc-af-map] attribute red bit-sequence 9
[*P1-pc-af-map] quit
[*P1] interface gigabitethernet1/0/0
[*P1-GigabitEthernet1/0/0] te link-attribute-application flex-algo
[*P1-GigabitEthernet1/0/0-te-link-attribute-application] link administrative group name green
[*P1-GigabitEthernet1/0/0-te-link-attribute-application] quit
[*P1-GigabitEthernet1/0/0] quit
[*P1] interface gigabitethernet2/0/0
[*P1-GigabitEthernet2/0/0] te link-attribute-application flex-algo
[*P1-GigabitEthernet2/0/0-te-link-attribute-application] link administrative group name green
[*P1-GigabitEthernet2/0/0-te-link-attribute-application] quit
[*P1-GigabitEthernet2/0/0] quit
[*P1] commit# 配置PE2。
[~PE2] te attribute enable
[*PE2] path-constraint affinity-mapping
[*PE2-pc-af-map] attribute green bit-sequence 1
[*PE2-pc-af-map] attribute red bit-sequence 9
[*PE2-pc-af-map] quit
[*PE2] interface gigabitethernet1/0/0
[*PE2-GigabitEthernet1/0/0] te link-attribute-application flex-algo
[*PE2-GigabitEthernet1/0/0-te-link-attribute-application] link administrative group name green
[*PE2-GigabitEthernet1/0/0-te-link-attribute-application] quit
[*PE2-GigabitEthernet1/0/0] quit
[*PE2] interface gigabitethernet3/0/0
[*PE2-GigabitEthernet3/0/0] te link-attribute-application flex-algo
[*PE2-GigabitEthernet3/0/0-te-link-attribute-application] link administrative group name red
[*PE2-GigabitEthernet3/0/0-te-link-attribute-application] quit
[*PE2-GigabitEthernet3/0/0] quit
[*PE2] commit# 配置P2。
[~P2] te attribute enable
[*P2] path-constraint affinity-mapping
[*P2-pc-af-map] attribute green bit-sequence 1
[*P2-pc-af-map] attribute red bit-sequence 9
[*P2-pc-af-map] quit
[*P2] interface gigabitethernet1/0/0
[*P2-GigabitEthernet1/0/0] te link-attribute-application flex-algo
[*P2-GigabitEthernet1/0/0-te-link-attribute-application] link administrative group name red
[*P2-GigabitEthernet1/0/0-te-link-attribute-application] quit
[*P2-GigabitEthernet1/0/0] quit
[*P2] interface gigabitethernet2/0/0
[*P2-GigabitEthernet2/0/0] te link-attribute-application flex-algo
[*P2-GigabitEthernet2/0/0-te-link-attribute-application] link administrative group name red
[*P2-GigabitEthernet2/0/0-te-link-attribute-application] quit
[*P2-GigabitEthernet2/0/0] quit
[*P2] commit4. 配置Flex-Algo算法定义
同一个IGP域可以选择1~2台设备配置Flex-Algo算法定义，为了提升可靠性，推荐选择2台设备配置Flex-Algo算法定义。
# 配置PE1。
[~PE1] flex-algo identifier 128
[*PE1-flex-algo-128] priority 100
[*PE1-flex-algo-128] affinity include-all green
[*PE1-flex-algo-128] quit
[*PE1] commit# 配置PE2。
[~PE2] flex-algo identifier 128
[*PE2-flex-algo-128] priority 100
[*PE2-flex-algo-128] affinity include-all green
[*PE2-flex-algo-128] quit
[*PE2] commit5. 使能IS-IS发布灵活算法能力，使能IS-IS进程的TE特性
# 配置PE1。
[~PE1] isis 1
[*PE1-isis-1] flex-algo 128 level-1
[*PE1-isis-1] ipv6 traffic-eng level-1
[*PE1-isis-1] quit
[*PE1] commit# 配置P1。
[~P1] isis 1
[*P1-isis-1] flex-algo 128 level-1
[*P1-isis-1] ipv6 traffic-eng level-1
[*P1-isis-1] quit
[*P1] commit# 配置PE2。
[~PE2] isis 1
[*PE2-isis-1] flex-algo 128 level-1
[*PE2-isis-1] ipv6 traffic-eng level-1
[*PE2-isis-1] quit
[*PE2] commit6. 在PE设备上配置使能IPv4地址族的VPN实例，将CE接入PE
# 配置PE1。
[~PE1] ip vpn-instance vpna
[*PE1-vpn-instance-vpna] ipv4-family
[*PE1-vpn-instance-vpna-af-ipv4] route-distinguisher 100:1
[*PE1-vpn-instance-vpna-af-ipv4] vpn-target 111:1 both
[*PE1-vpn-instance-vpna-af-ipv4] quit
[*PE1-vpn-instance-vpna] quit
[*PE1] interface gigabitethernet 2/0/0
[*PE1-GigabitEthernet2/0/0] ip binding vpn-instance vpna
[*PE1-GigabitEthernet2/0/0] ip address 10.1.1.2 24
[*PE1-GigabitEthernet2/0/0] quit
[*PE1] commit# 配置PE2。
[~PE2] ip vpn-instance vpna
[*PE2-vpn-instance-vpna] ipv4-family
[*PE2-vpn-instance-vpna-af-ipv4] route-distinguisher 200:1
[*PE2-vpn-instance-vpna-af-ipv4] vpn-target 111:1 both
[*PE2-vpn-instance-vpna-af-ipv4] quit
[*PE2-vpn-instance-vpna] quit
[*PE2] interface gigabitethernet 2/0/0
[*PE2-GigabitEthernet2/0/0] ip binding vpn-instance vpna
[*PE2-GigabitEthernet2/0/0] ip address 10.2.1.2 24
[*PE2-GigabitEthernet2/0/0] quit
[*PE2] commit# 按图1配置各CE的接口IP地址，配置过程请参见后面的配置文件。
配置完成后，在PE设备上执行display ip vpn-instance verbose命令可以看到VPN实例的配置情况。各PE能ping通自己接入的CE。
7. 在PE与CE之间建立EBGP对等体关系
# 配置CE1。
[~CE1] interface loopback 1
[*CE1-LoopBack1] ip address 10.11.1.1 32
[*CE1-LoopBack1] quit
[*CE1] bgp 65410
[*CE1-bgp] peer 10.1.1.2 as-number 100
[*CE1-bgp] network 10.11.1.1 32
[*CE1-bgp] quit
[*CE1] commit# 配置PE1。
[~PE1] bgp 100
[*PE1-bgp] router-id 1.1.1.1
[*PE1-bgp] ipv4-family vpn-instance vpna
[*PE1-bgp-vpna] peer 10.1.1.1 as-number 65410
[*PE1-bgp-vpna] import-route direct
[*PE1-bgp-vpna] commit
[~PE1-bgp-vpna] quit
[~PE1-bgp] quit# 配置CE2。
[~CE2] interface loopback 1
[*CE2-LoopBack1] ip address 10.22.2.2 32
[*CE2-LoopBack1] quit
[*CE2] bgp 65420
[*CE2-bgp] peer 10.2.1.2 as-number 100
[*CE2-bgp] network 10.22.2.2 32
[*CE2-bgp] quit
[*CE2] commit# 配置PE2。
[~PE2] bgp 100
[*PE2-bgp] router-id 2.2.2.2
[*PE2-bgp] ipv4-family vpn-instance vpna
[*PE2-bgp-vpna] peer 10.2.1.1 as-number 65420
[*PE2-bgp-vpna] import-route direct
[*PE2-bgp-vpna] commit
[~PE2-bgp-vpna] quit
[~PE2-bgp] quit配置完成后，在PE设备上执行display bgp vpnv4 vpn-instance peer命令，可以看到PE与CE之间的BGP对等体关系已建立，并达到Established状态。
以PE1与CE1的对等体关系为例：
[~PE1] display bgp vpnv4 vpn-instance vpna peer
BGP local router ID : 1.1.1.1
Local AS number : 100
VPN-Instance vpna, Router ID 1.1.1.1:
Total number of peers : 1 Peers in established state : 1
Peer V AS MsgRcvd MsgSent OutQ Up/Down State PrefRcv
10.1.1.1 4 65410 147 148 0 02:05:47 Established 18. 在PE之间建立MP-IBGP对等体关系
# 配置PE1。
[~PE1] bgp 100
[~PE1-bgp] peer 3::3 as-number 100
[*PE1-bgp] peer 3::3 connect-interface loopback 1
[*PE1-bgp] ipv4-family vpnv4
[*PE1-bgp-af-vpnv4] peer 3::3 enable
[*PE1-bgp-af-vpnv4] commit
[~PE1-bgp-af-vpnv4] quit
[~PE1-bgp] quit# 配置PE2。
[~PE2] bgp 100
[~PE2-bgp] peer 1::1 as-number 100
[*PE2-bgp] peer 1::1 connect-interface loopback 1
[*PE2-bgp] ipv4-family vpnv4
[*PE2-bgp-af-vpnv4] peer 1::1 enable
[*PE2-bgp-af-vpnv4] commit
[~PE2-bgp-af-vpnv4] quit
[~PE2-bgp] quit配置完成后，在PE设备上执行display bgp vpnv4 all peer命令，可以看到PE之间的BGP对等体关系已建立，并达到Established状态。以PE1的显示为例：
[~PE1] display bgp vpnv4 all peer
BGP local router ID : 1.1.1.1
Local AS number : 100
Total number of peers : 2 Peers in established state : 2
Peer V AS MsgRcvd MsgSent OutQ Up/Down State PrefRcv
3::3 4 100 149 149 0 02:06:22 Established 2
Peer of IPv4-family for vpn instance :
VPN-Instance vpna, Router ID 1.1.1.1:
Peer V AS MsgRcvd MsgSent OutQ Up/Down State PrefRcv
10.1.1.1 4 65410 150 151 0 02:08:04 Established 1 9. 在PE之间建立基于Flex-Algo的SRv6 BE路径
# 配置PE1。
[~PE1] segment-routing ipv6
[*PE1-segment-routing-ipv6] encapsulation source-address 1::1
[*PE1-segment-routing-ipv6] locator as1 ipv6-prefix 10:: 64 static 32 flex-algo 128
[*PE1-segment-routing-ipv6-locator] quit
[*PE1-segment-routing-ipv6] quit
[*PE1] bgp 100
[*PE1-bgp] ipv4-family vpnv4
[*PE1-bgp-af-vpnv4] peer 3::3 prefix-sid
[*PE1-bgp-af-vpnv4] quit
[*PE1-bgp] ipv4-family vpn-instance vpna
[*PE1-bgp-vpna] segment-routing ipv6 best-effort
[*PE1-bgp-vpna] segment-routing ipv6 locator as1
[*PE1-bgp-vpna] quit
[*PE1-bgp] quit
[*PE1] isis 1
[*PE1-isis-1] segment-routing ipv6 locator as1
[*PE1-isis-1] commit
[~PE1-isis-1] quit# 配置PE2。
[~PE2] segment-routing ipv6
[*PE2-segment-routing-ipv6] encapsulation source-address 3::3
[*PE2-segment-routing-ipv6] locator as1 ipv6-prefix 30:: 64 static 32 flex-algo 128
[*PE2-segment-routing-ipv6-locator] quit
[*PE2-segment-routing-ipv6] quit
[*PE2] bgp 100
[*PE2-bgp] ipv4-family vpnv4
[*PE2-bgp-af-vpnv4] peer 1::1 prefix-sid
[*PE2-bgp-af-vpnv4] quit
[*PE2-bgp] ipv4-family vpn-instance vpna
[*PE2-bgp-vpna] segment-routing ipv6 best-effort
[*PE2-bgp-vpna] segment-routing ipv6 locator as1
[*PE2-bgp-vpna] quit
[*PE2-bgp] quit
[*PE2] isis 1
[*PE2-isis-1] segment-routing ipv6 locator as1
[*PE2-isis-1] commit
[~PE2-isis-1] quit# 配置P1。
[~P1] segment-routing ipv6
[*P1-segment-routing-ipv6] locator as1 ipv6-prefix 20:: 64 static 32 flex-algo 128
[*P1-segment-routing-ipv6-locator] quit
[*P1-segment-routing-ipv6] quit
[*P1] isis 1
[*P1-isis-1] segment-routing ipv6 locator as1
[*P1-isis-1] commit
[~P1-isis-1] quit# 配置P2。
[~P2] segment-routing ipv6
[*P2-segment-routing-ipv6] locator as1 ipv6-prefix 40:: 64 static 32 flex-algo 128
[*P2-segment-routing-ipv6-locator] quit
[*P2-segment-routing-ipv6] quit
[*P2] isis 1
[*P2-isis-1] segment-routing ipv6 locator as1
[*P2-isis-1] commit
[~P2-isis-1] quit10. 检查配置结果
执行命令display segment-routing ipv6 locator [ locator-name ] verbose查看SRv6的Locator信息。以PE1为例：
[~PE1] display segment-routing ipv6 locator verbose
Locator Configuration Table
---------------------------
LocatorName : as1 LocatorID : 2
IPv6Prefix : 10:: PrefixLength : 64
Block : -- BlockLength : 0
NodeID : -- NodeIdLength : 0
ComprStaticLen: 0 StaticLength : 32
ArgsLength : 0 Reference : 0
AutoCSIDPoolID: 0 ComprDynLength: 0
Algorithm : 128
AutoCSIDBegin : --
AutoCSIDEnd : --
StaticCSIDBegin: --
StaticCSIDEnd : --
AutoSIDPoolID : 8193 DynLength : 32
AutoSIDBegin : 10::1:0:0
AutoSIDEnd : 10::FFFF:FFFF:FFFF:FFFF
StaticSIDBegin: 10::1
StaticSIDEnd : 10::FFFF:FFFF
Total Locator(s): 1 执行命令display segment-routing ipv6 local-sid end-dt4 forwarding查看SRv6的Local SID表信息。以PE1为例：
[~PE1] display segment-routing ipv6 local-sid end-dt4 forwarding
My Local-SID End.DT4 Forwarding Table
-------------------------------------
SID : 10::1:0:20/128 FuncType : End.DT4
VPN Name : vpna VPN ID : 3
LocatorName: as1 LocatorID: 1
Total SID(s): 1 在PE设备上执行display bgp vpnv4 all routing-table命令，可以看到BGP VPNv4路由信息。以PE1的显示为例：
[~PE1] display bgp vpnv4 all routing-table
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
RPKI validation codes: V - valid, I - invalid, N - not-found
Total number of routes from all PE: 6
Route Distinguisher: 100:1
Network NextHop MED LocPrf PrefVal Path/Ogn
*> 10.1.1.0/24 0.0.0.0 0 0 ?
*> 10.1.1.1/32 0.0.0.0 0 0 ?
*> 10.11.1.1/32 10.1.1.1 0 0 65410i
*> 127.0.0.0/8 0.0.0.0 0 0 ?
Route Distinguisher: 200:1
Network NextHop MED LocPrf PrefVal Path/Ogn
*>i 10.2.1.0/24 3::3 0 100 0 ?
*>i 10.22.2.2/32 3::3 0 100 0 65420i
VPN-Instance vpna, Router ID 1.1.1.1:
Total Number of Routes: 6
Network NextHop MED LocPrf PrefVal Path/Ogn
*> 10.1.1.0/24 0.0.0.0 0 0 ?
*> 10.1.1.1/32 0.0.0.0 0 0 ?
*>i 10.2.1.0/24 3::3 0 100 0 ?
*> 10.11.1.1/32 10.1.1.1 0 0 65410i
*>i 10.22.2.2/32 3::3 0 100 0 65420i
*> 127.0.0.0/8 0.0.0.0 0 0 ? 在PE设备上执行display ip routing-table vpn-instance vpna命令，可以看到VPN实例路由表信息。以PE1的显示为例：
[~PE1] display ip routing-table vpn-instance vpna
Route Flags: R - relay, D - download to fib, T - to vpn-instance, B - black hole route
------------------------------------------------------------------------------
Routing Table : vpna
Destinations : 8 Routes : 8
Destination/Mask Proto Pre Cost Flags NextHop Interface
10.1.1.0/24 Direct 0 0 D 10.1.1.2 GigabitEthernet2/0/0
10.1.1.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet2/0/0
10.1.1.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet2/0/0
10.2.1.0/24 IBGP 255 0 RD 30::1:0:20 SRv6 BE
10.11.1.1/32 EBGP 255 0 RD 10.1.1.1 GigabitEthernet2/0/0
10.22.2.2/32 IBGP 255 0 RD 30::1:0:20 SRv6 BE
127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0
255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0 在PE设备上执行display ip routing-table vpn-instance vpna ip-address verbose命令，可以看到VPN实例路由的详细信息。以PE1的显示为例：
[~PE1] display ip routing-table vpn-instance vpna 10.22.2.2 verbose
Route Flags: R - relay, D - download to fib, T - to vpn-instance, B - black hole route
------------------------------------------------------------------------------
Routing Table : vpna
Summary Count : 1
Destination: 10.22.2.2/32
Protocol: IBGP Process ID: 0
Preference: 255 Cost: 0
NextHop: 30::1:0:20 Neighbour: 3::3
State: Active Adv Relied Age: 00h03m06s
Tag: 0 Priority: low
Label: 3 QoSInfo: 0x0
IndirectID: 0x10000C3 Instance:
RelayNextHop: 30::1:0:20 Interface: SRv6 BE
TunnelID: 0x0 Flags: RD 同一VPN的CE能够相互Ping通，例如：
[~CE1] ping -a 10.11.1.1 10.22.2.2
PING 10.22.2.2: 56 data bytes, press CTRL_C to break
Reply from 10.22.2.2: bytes=56 Sequence=1 ttl=253 time=4 ms
Reply from 10.22.2.2: bytes=56 Sequence=2 ttl=253 time=3 ms
Reply from 10.22.2.2: bytes=56 Sequence=3 ttl=253 time=3 ms
Reply from 10.22.2.2: bytes=56 Sequence=4 ttl=253 time=3 ms
Reply from 10.22.2.2: bytes=56 Sequence=5 ttl=253 time=3 ms
--- 10.22.2.2 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 3/115/567 ms 以上是关于华为路由器实验指导 | 配置L3VdPdNdv4 over SRv6 BE Flex-Algo的主要内容，如果未能解决你的问题，请参考以下文章
华为NE40E路由器实验配置示例 | 配置L3VdPdNdv4 over SRv6 BE ECMP
华为NE40E路由器实验配置示例 | 配置EVdPdNd L3VdPdNdv4 over SRv6 BE
华为NE40E路由器实验配置示例 | 配置EVdPdNd L3VdPdNdv4 over SRv6 BE网络切片
华为NE40E路由器实验配置示例 | 配置L3VdPdNdv4 over SRv6 BE的VdPdNd FRR功能
华为NE40E路由器实验配置示例 | 配置EVdPdNd L3VdPdNdv4 over SRv6 BE Flex-Algo