华为运营商级路由器配置示例 | 公网IPv4 over SRv6 TE Policy
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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网络互连的目的。PE1、P和PE2属于IS-IS进程1，都是Level-1设备。PE1与PE2之间部署IBGP邻居，PE和Device之间部署EBGP邻居。
要求在PE1和PE2之间建立双向SRv6 TE Policy路径，承载公网IPv4业务。
图1 配置公网IPv4 over SRv6 TE Policy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，指定网络实体名称。
- 在PE和Device之间建立EBGP对等体关系。
- 在PE之间建立MP-IBGP对等体关系。
- 在PE1和PE2上配置SRv6 TE Policy。配置IS-IS的SRv6能力。
操作步骤
1.使能各接口的IPv6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:DB8:10::1 96
[*PE1-GigabitEthernet1/0/0] quit
[*PE1] interface loopback1
[*PE1-LoopBack1] ipv6 enable
[*PE1-LoopBack1] ipv6 address 2001:DB8:1::1 128
[*PE1-LoopBack1] commit
[~PE1-LoopBack1] quit2.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 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 8s L1 64
Total Peer(s): 1# 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
--------------------------------------------------------------------------------
2001:DB8:1::1/128 Loop1 Direct 0 D/-/L/-
2001:DB8:2::2/128 GE1/0/0 FE80::3A92:6CFF:FE21:10 10 A/-/-/-
2001:DB8:3::3/128 GE1/0/0 FE80::3A92:6CFF:FE21:10 20 A/-/-/-
2001:DB8:10::/96 GE1/0/0 Direct 10 D/-/L/-
2001:DB8:20::/96 GE1/0/0 FE80::3A92:6CFF:FE21:10 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 Protect3.在PE与Device之间建立EBGP对等体关系
# 配置DeviceA。
[~DeviceA] interface gigabitethernet 1/0/0
[~DeviceA-GigabitEthernet1/0/0] ip address 192.168.1.1 24
[*DeviceA-GigabitEthernet1/0/0] quit
[*DeviceA] bgp 200
[*DeviceA-bgp] router-id 4.4.4.4
[*DeviceA-bgp] peer 192.168.1.2 as-number 100
[*DeviceA-bgp] quit
[*DeviceA] commit# 配置PE1。
[~PE1] interface gigabitethernet 2/0/0
[~PE1-GigabitEthernet2/0/0] ip address 192.168.1.2 24
[*PE1-GigabitEthernet2/0/0] quit
[*PE1] bgp 100
[*PE1-bgp] router-id 1.1.1.1
[*PE1-bgp] peer 192.168.1.1 as-number 200
[*PE1-bgp] ipv4-family unicast
[*PE1-bgp-af-ipv4] peer 192.168.1.1 enable
[*PE1-bgp-af-ipv4] network 192.168.1.0 24
[*PE1-bgp-af-ipv4] commit
[~PE1-bgp-af-ipv4] quit
[~PE1-bgp] quit# 配置DeviceB。
[~DeviceB] interface gigabitethernet 1/0/0
[~DeviceB-GigabitEthernet1/0/0] ip address 192.168.2.1 24
[*DeviceB-GigabitEthernet1/0/0] quit
[*DeviceB] bgp 300
[*DeviceB-bgp] router-id 5.5.5.5
[*DeviceB-bgp] peer 192.168.2.2 as-number 100
[*DeviceB-bgp] quit
[*DeviceB] commit# 配置PE2。
[~PE2] interface gigabitethernet 2/0/0
[~PE2-GigabitEthernet2/0/0] ip address 192.168.2.2 24
[*PE2-GigabitEthernet2/0/0] quit
[*PE2] bgp 100
[*PE2-bgp] router-id 2.2.2.2
[*PE2-bgp] peer 192.168.2.1 as-number 300
[*PE2-bgp] ipv4-family unicast
[*PE2-bgp-af-ipv4] peer 192.168.2.1 enable
[*PE2-bgp-af-ipv4] network 192.168.2.0 24
[*PE2-bgp-af-ipv4] commit
[~PE2-bgp-af-ipv4] quit
[~PE2-bgp] quit配置完成后，在PE设备上执行display bgp peer命令，可以看到PE与Device之间的BGP对等体关系已建立，并达到Established状态。
以PE1与DeviceA的对等体关系为例：
[~PE1] display bgp 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
192.168.1.1 4 200 1624 1622 0 00:06:37 Established 14.在PE之间建立MP-IBGP对等体关系
# 配置PE1。
[~PE1] bgp 100
[~PE1-bgp] peer 2001:DB8:3::3 as-number 100
[*PE1-bgp] peer 2001:DB8:3::3 connect-interface loopback1
[*PE1-bgp] ipv4-family unicast
[*PE1-bgp-af-ipv4] peer 2001:DB8:3::3 enable
[*PE1-bgp-af-ipv4] peer 2001:DB8:3::3 next-hop-local
[*PE1-bgp-af-ipv4] commit
[~PE1-bgp-af-ipv4] quit
[~PE1-bgp] quit# 配置PE2。
[~PE2] bgp 100
[~PE2-bgp] peer 2001:DB8:1::1 as-number 100
[*PE2-bgp] peer 2001:DB8:1::1 connect-interface loopback1
[*PE2-bgp] ipv4-family unicast
[*PE2-bgp-af-ipv4] peer 2001:DB8:1::1 enable
[*PE2-bgp-af-ipv4] peer 2001:DB8:1::1 next-hop-local
[*PE2-bgp-af-ipv4] commit
[~PE2-bgp-af-ipv4] quit
[~PE2-bgp] quit配置完成后，在PE设备上执行display bgp 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 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
192.168.1.1 4 200 10 11 0 00:05:15 Established 2
2001:DB8:3::3 4 100 10 11 0 00:05:15 Established 2 5.在PE上配置公网路由携带Color属性和SID属性
# 配置PE1。
[~PE1] segment-routing ipv6
[*PE1-segment-routing-ipv6] encapsulation source-address 2001:DB8:1::1
[*PE1-segment-routing-ipv6] locator aa ipv6-prefix 2001:DB8:100:: 64 static 32
[*PE1-segment-routing-ipv6-locator] opcode ::100 end psp
[*PE1-segment-routing-ipv6-locator] quit
[*PE1-segment-routing-ipv6] quit
[*PE1] isis 1
[*PE1-isis-1] segment-routing ipv6 locator aa
[*PE1-isis-1] quit
[*PE1] route-policy color permit node 10
[*PE1-route-policy] apply extcommunity color 0:101
[*PE1-route-policy] quit
[*PE1] bgp 100
[*PE1-bgp] ipv4-family unicast
[*PE1-bgp-af-ipv4] peer 2001:DB8:3::3 route-policy color export
[*PE1-bgp-af-ipv4] peer 2001:DB8:3::3 advertise-ext-community
[*PE1-bgp-af-ipv4] peer 2001:DB8:3::3 prefix-sid
[*PE1-bgp-af-ipv4] segment-routing ipv6 locator aa
[*PE1-bgp-af-ipv4] commit
[~PE1-bgp-af-ipv4] quit
[~PE1-bgp] quit# 配置P。
[~P] segment-routing ipv6
[*P-segment-routing-ipv6] encapsulation source-address 2001:DB8:2::2
[*P-segment-routing-ipv6] locator aa ipv6-prefix 2001:DB8:200:: 64 static 32
[*P-segment-routing-ipv6-locator] opcode ::100 end psp
[*P-segment-routing-ipv6-locator] quit
[*P-segment-routing-ipv6] quit
[*P] isis 1
[*P-isis-1] segment-routing ipv6 locator aa
[*P-isis-1] commit
[~P-isis-1] quit# 配置PE2。
[~PE2] segment-routing ipv6
[*PE2-segment-routing-ipv6] encapsulation source-address 2001:DB8:3::3
[*PE2-segment-routing-ipv6] locator aa ipv6-prefix 2001:DB8:300:: 64 static 32
[*PE2-segment-routing-ipv6-locator] opcode ::100 end psp
[*PE2-segment-routing-ipv6-locator] quit
[*PE2-segment-routing-ipv6] quit
[*PE2] isis 1
[*PE2-isis-1] segment-routing ipv6 locator aa
[*PE2-isis-1] quit
[*PE2] route-policy color permit node 10
[*PE2-route-policy] apply extcommunity color 0:101
[*PE2-route-policy] quit
[*PE2] bgp 100
[*PE2-bgp] ipv4-family unicast
[*PE2-bgp-af-ipv4] peer 2001:DB8:1::1 route-policy color export
[*PE2-bgp-af-ipv4] peer 2001:DB8:1::1 advertise-ext-community
[*PE2-bgp-af-ipv4] peer 2001:DB8:1::1 prefix-sid
[*PE2-bgp-af-ipv4] segment-routing ipv6 locator aa
[*PE2-bgp-af-ipv4] commit
[~PE2-bgp-af-ipv4] quit
[~PE2-bgp] quit执行命令display segment-routing ipv6 local-sid end forwarding查看SRv6的Local SID表信息。
[~PE1] display segment-routing ipv6 local-sid end forwarding
My Local-SID End Forwarding Table
---------------------------------
SID : 2001:DB8:100::100/128 FuncType : End
Flavor : PSP
LocatorName : aa LocatorID : 2
ProtocolType: STATIC ProcessID : --
UpdateTime : 2021-08-30 03:57:38.782
SID : 2001:DB8:100::1:0:1/128 FuncType : End
Flavor : NO-FLAVOR
LocatorName : aa LocatorID : 2
ProtocolType: ISIS ProcessID : 1
UpdateTime : 2021-08-30 04:02:38.500
SID : 2001:DB8:100::1:0:2/128 FuncType : End
Flavor : PSP USP USD
LocatorName : aa LocatorID : 2
ProtocolType: ISIS ProcessID : 1
UpdateTime : 2021-08-30 04:02:38.500
Total SID(s): 3
[~P] display segment-routing ipv6 local-sid end forwarding
My Local-SID End Forwarding Table
---------------------------------
SID : 2001:DB8:200::100/128 FuncType : End
Flavor : PSP
LocatorName : aa LocatorID : 1
ProtocolType: STATIC ProcessID : --
UpdateTime : 2021-08-30 03:58:56.659
SID : 2001:DB8:200::1:0:0/128 FuncType : End
Flavor : NO-FLAVOR
LocatorName : aa LocatorID : 1
ProtocolType: ISIS ProcessID : 1
UpdateTime : 2021-08-30 03:58:58.649
SID : 2001:DB8:200::1:0:1/128 FuncType : End
Flavor : PSP USP USD
LocatorName : aa LocatorID : 1
ProtocolType: ISIS ProcessID : 1
UpdateTime : 2021-08-30 03:58:58.649
Total SID(s): 3
[~PE2] display segment-routing ipv6 local-sid end forwarding
My Local-SID End Forwarding Table
---------------------------------
SID : 2001:DB8:300::100/128 FuncType : End
Flavor : PSP
LocatorName : aa LocatorID : 1
ProtocolType: STATIC ProcessID : --
UpdateTime : 2021-08-30 03:58:57.124
SID : 2001:DB8:300::1:0:0/128 FuncType : End
Flavor : NO-FLAVOR
LocatorName : aa LocatorID : 1
ProtocolType: ISIS ProcessID : 1
UpdateTime : 2021-08-30 03:58:57.723
SID : 2001:DB8:300::1:0:1/128 FuncType : End
Flavor : PSP USP USD
LocatorName : aa LocatorID : 1
ProtocolType: ISIS ProcessID : 1
UpdateTime : 2021-08-30 03:58:58.236
Total SID(s): 3 执行display segment-routing ipv6 local-sid end-dt4 forwarding命令查看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 : 2001:DB8:100::1:0:3C/128 FuncType : End.DT4
VPN Name : _public_ VPN ID : 0
LocatorName: aa LocatorID: 1
Total SID(s): 1执行display bgp routing-table命令，可以看到BGP路由表信息。以PE2的显示为例：
[~PE2] display bgp routing-table 192.168.1.0
BGP local router ID : 2.2.2.2
Local AS number : 100
Paths: 1 available, 1 best, 1 select, 0 best-external, 0 add-path
BGP routing table entry information of 192.168.1.0/24:
From: 2001:DB8:1::1 (1.1.1.1)
Route Duration: 2d02h11m33s
Relay IP Nexthop: FE80::3ABD:6CFF:FE31:300
Relay IP Out-Interface: GigabitEthernet1/0/0
Relay Tunnel Out-Interface:
Original nexthop: 2001:DB8:1::1
Qos information : 0x0
Ext-Community: Color <0 : 101>
Prefix-sid: 2001:DB8:100::1:0:3C
AS-path Nil, origin igp, MED 0, localpref 100, pref-val 0, valid, internal, best, select, pre 255
Advertised to such 1 peers:
192.168.2.16.配置SRv6 TE Policy
# 配置PE1。
[~PE1] segment-routing ipv6
[~PE1-segment-routing-ipv6] segment-list list1
[*PE1-segment-routing-ipv6-segment-list-list1] index 5 sid ipv6 2001:DB8:200::100
[*PE1-segment-routing-ipv6-segment-list-list1] index 10 sid ipv6 2001:DB8:300::100
[*PE1-segment-routing-ipv6-segment-list-list1] quit
[*PE1-segment-routing-ipv6] srv6-te policy policy1 endpoint 2001:DB8:3::3 color 101
[*PE1-segment-routing-ipv6-policy-policy1] candidate-path preference 100
[*PE1-segment-routing-ipv6-policy-policy1-path] segment-list list1
[*PE1-segment-routing-ipv6-policy-policy1-path] commit
[~PE1-segment-routing-ipv6-policy-policy1-path] quit
[~PE1-segment-routing-ipv6-policy-policy1] quit
[~PE1-segment-routing-ipv6] quit# 配置PE2。
[~PE2] segment-routing ipv6
[~PE2-segment-routing-ipv6] segment-list list1
[*PE2-segment-routing-ipv6-segment-list-list1] index 5 sid ipv6 2001:DB8:200::100
[*PE2-segment-routing-ipv6-segment-list-list1] index 10 sid ipv6 2001:DB8:100::100
[*PE2-segment-routing-ipv6-segment-list-list1] quit
[*PE2-segment-routing-ipv6] srv6-te policy policy1 endpoint 2001:DB8:1::1 color 101
[*PE2-segment-routing-ipv6-policy-policy1] candidate-path preference 100
[*PE2-segment-routing-ipv6-policy-policy1-path] segment-list list1
[*PE2-segment-routing-ipv6-policy-policy1-path] commit
[~PE2-segment-routing-ipv6-policy-policy1-path] quit
[~PE2-segment-routing-ipv6-policy-policy1] quit
[~PE2-segment-routing-ipv6] quit执行命令display srv6-te policy查看SRv6 TE Policy信息。以PE1的显示为例：
[~PE1] display srv6-te policy
PolicyName : policy1
Color : 101 Endpoint : 2001:DB8:3::3
TunnelId : 1 Binding SID : -
TunnelType : SRv6-TE Policy DelayTimerRemain : -
Policy State : Up State Change Time : 2021-03-25 13:13:36
Admin State : Up Traffic Statistics : Disable
Backup Hot-Standby : Disable BFD : Disable
Interface Index : - Interface Name : -
Interface State : - Encapsulation Mode : Insert
Candidate-path Count : 1
Candidate-path Preference : 100
Path State : Active Path Type : Primary
Protocol-Origin : Configuration(30) Originator : 0, 0.0.0.0
Discriminator : 100 Binding SID : -
GroupId : 1 Policy Name : policy1
Template ID : 0 Path Verification : Disable
DelayTimerRemain : -
Segment-List Count : 1
Segment-List : list1
Segment-List ID : 2 XcIndex : 2
List State : Up DelayTimerRemain : -
Verification State : - SuppressTimeRemain : -
PMTU : 9600 Active PMTU : 9600
Weight : 1 BFD State : -
SID :
2001:DB8:200::100
2001:DB8:300::1007.配置隧道策略，引入公网流量
# 配置PE1。
[~PE1] tunnel-policy p1
[*PE1-tunnel-policy-p1] tunnel select-seq ipv6 srv6-te-policy load-balance-number 1
[*PE1-tunnel-policy-p1] quit
[*PE1] tunnel-selector p1 permit node 1
[*PE1-tunnel-selector] apply tunnel-policy p1
[*PE1-tunnel-selector] quit
[*PE1] bgp 100
[*PE1-bgp] ipv4-family unicast
[*PE1-bgp-af-ipv4] unicast-route recursive-lookup tunnel-v6 tunnel-selector p1
[*PE1-bgp-af-ipv4] segment-routing ipv6 traffic-engineer
[*PE1-bgp-af-ipv4] commit
[~PE1-bgp-af-ipv4] quit
[~PE1-bgp] quit# 配置PE2。
[~PE2] tunnel-policy p1
[*PE2-tunnel-policy-p1] tunnel select-seq ipv6 srv6-te-policy load-balance-number 1
[*PE2-tunnel-policy-p1] quit
[*PE2] tunnel-selector p1 permit node 1
[*PE2-tunnel-selector] apply tunnel-policy p1
[*PE2-tunnel-selector] quit
[*PE2] bgp 100
[*PE2-bgp] ipv4-family unicast
[*PE2-bgp-af-ipv4] unicast-route recursive-lookup tunnel-v6 tunnel-selector p1
[*PE2-bgp-af-ipv4] segment-routing ipv6 traffic-engineer
[*PE2-bgp-af-ipv4] commit
[~PE2-bgp-af-ipv4] quit
[~PE2-bgp] quit配置完成后，执行display bgp routing-table命令，可以看到BGP路由表信息。以PE2的显示为例：
[~PE2] display bgp routing-table 192.168.1.0
BGP local router ID : 2.2.2.2
Local AS number : 100
Paths: 1 available, 1 best, 1 select, 0 best-external, 0 add-path
BGP routing table entry information of 192.168.1.0/24:
From: 2001:DB8:1::1 (1.1.1.1)
Route Duration: 0d00h39m53s
Relay IP Nexthop: FE80::3A83:DEFF:FE21:301
Relay IP Out-Interface: GigabitEthernet1/0/0
Relay Tunnel Out-Interface: policy1(srv6tepolicy)
Original nexthop: 2001:DB8:1::1
Qos information : 0x0
Ext-Community: Color <0 : 101>
Prefix-sid: 2001:DB8:100::1:0:3C
AS-path Nil, origin igp, MED 0, localpref 100, pref-val 0, valid, internal, best, select, pre 255
Advertised to such 1 peers:
192.168.2.1执行命令display ip routing-table查看IP路由表信息，可以看到公网IPv4路由已经成功迭代到SRv6 TE Policy。
以PE1的显示为例：
[~PE1] display ip routing-table
Route Flags: R - relay, D - download to fib, T - to vpn-instance, B - black hole route
------------------------------------------------------------------------------
Routing Table : _public_
Destinations : 4 Routes : 4
Destination/Mask Proto Pre Cost Flags NextHop Interface
192.168.1.0/24 Direct 0 0 D 192.168.1.2 GigabitEthernet2/0/0
192.168.1.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet2/0/0
192.168.1.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet2/0/0
192.168.2.0/24 IBGP 255 0 RD 2001:DB8:3::3 policy1Device之间能够相互Ping通，例如：
[~DeviceA] ping -a 192.168.1.1 192.168.2.1
PING 192.168.2.1: 56 data bytes, press CTRL_C to break
Reply from 192.168.2.1: bytes=56 Sequence=1 ttl=253 time=19 ms
Reply from 192.168.2.1: bytes=56 Sequence=2 ttl=253 time=18 ms
Reply from 192.168.2.1: bytes=56 Sequence=3 ttl=253 time=19 ms
Reply from 192.168.2.1: bytes=56 Sequence=4 ttl=253 time=20 ms
Reply from 192.168.2.1: bytes=56 Sequence=5 ttl=253 time=22 ms
--- 192.168.2.1 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 18/19/22 ms以上是关于华为运营商级路由器配置示例 | 公网IPv4 over SRv6 TE Policy的主要内容，如果未能解决你的问题，请参考以下文章
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