Example for Configuring L3VPNv4 over SRv6 TE Policy (Manual Configuration with SRH Compression)
This section provides an example for configuring an SRv6 TE Policy to carry L3VPNv4 services.
Networking Requirements
On the network shown in Figure 1, PE1, P1, P2, and PE2 are in the same AS. It is required that IS-IS be configured for these devices to achieve IPv6 network connectivity, a bidirectional SRv6 TE Policy be deployed between PE1 and PE2 to carry L3VPNv4 services, and SRH compression be performed to reduce the SRv6 header size.
Precautions
- SRv6 TE Policy configuration requires End or End.X SIDs. The SIDs can be configured manually, or they can be generated dynamically using an IGP. In scenarios where SRv6 TE Policies are configured manually, if dynamic SIDs are used for the SRv6 TE Policies, the SIDs may change after an IGP restart. In this case, you need to manually adjust the SRv6 TE Policies so that they remain up. For this reason, dynamic SIDs are not suitable for large-scale use. You are therefore advised to configure SIDs manually and not to use dynamic SIDs.
- To implement color-based traffic steering into SRv6 TE Policies, you need to configure the color attribute using an import or export route-policy. You also need to configure a tunnel policy to allow routes to recurse to SRv6 TE Policies.
After the preceding configurations are complete, if the color and next hop of a route are the same as the color and endpoint of an SRv6 TE Policy, respectively, the route can successfully recurse to the SRv6 TE Policy. This enables the traffic forwarded through the route to be steered into the SRv6 TE Policy.
- When configuring a segment list, you need to run the index index sid ipv6 ipv6address compress block block-value command, with the value of block-value being the same as that of block-length specified in the locator locator-name [ ipv6-prefix ipv6-address prefix-length compress block block-length [ compress-static compress-length | static static-length | args args-length | flex-algo flexAlgoId ] * ] command.
- The last SID in a segment list cannot be of the COC type.
Configuration Roadmap
The configuration roadmap is as follows:
Enable IPv6 forwarding and configure an IPv6 address for each interface on PE1, P1, P2, and PE2.
Enable IS-IS, configure an IS-IS level, and specify a network entity title (NET) on PE1, P1, P2, and PE2.
Configure an IPv4 L3VPN instance on each PE and bind the IPv4 L3VPN instance to an access-side interface.
Establish an EBGP peer relationship between each PE and its connected CE.
Establish a BGP VPNv4 peer relationship between the PEs.
- Configure SRv6 SIDs and enable IS-IS SRv6 on PE1, P1, P2, and PE2. In addition, configure PE1 and PE2 to advertise VPN routes carrying SIDs.
Deploy an SRv6 TE Policy between PE1 and PE2.
- Configure a tunnel policy on PE1 and PE2 to import VPN traffic.
Data Preparation
To complete the configuration, you need the following data:
IPv6 address of each interface on PE1, P1, P2, and PE2
IS-IS process ID of PE1, P1, P2, and PE2
IS-IS level of PE1, P1, P2, and PE2
VPN instance names, RDs, and RTs on PE1 and PE2
Procedure
- Enable IPv6 forwarding and configure an IPv6 address for each interface.
# Configure PE1. The configurations of P1, P2, and PE2 are similar to the configuration of PE1. For configuration details, see Configuration Files in this section.
<HUAWEI> system-view [~HUAWEI] sysname PE1 [*HUAWEI] commit [~PE1] interface gigabitethernet 0/1/0 [~PE1-GigabitEthernet0/1/0] ipv6 enable [*PE1-GigabitEthernet0/1/0] ipv6 address 2001:DB8:10::1 64 [*PE1-GigabitEthernet0/1/0] quit [*PE1] interface LoopBack 1 [*PE1-LoopBack1] ipv6 enable [*PE1-LoopBack1] ipv6 address 2001:DB8:1::1 128 [*PE1-LoopBack1] quit [*PE1] commit
- Configure IS-IS.
# Configure 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 0/1/0 [*PE1-GigabitEthernet0/1/0] isis ipv6 enable 1 [*PE1-GigabitEthernet0/1/0] quit [*PE1] interface loopback1 [*PE1-LoopBack1] isis ipv6 enable 1 [*PE1-LoopBack1] quit [*PE1] commit
# Configure 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 0/1/0 [*P1-GigabitEthernet0/1/0] isis ipv6 enable 1 [*P1-GigabitEthernet0/1/0] quit [*P1] interface gigabitethernet 0/1/8 [*P1-GigabitEthernet0/1/8] isis ipv6 enable 1 [*P1-GigabitEthernet0/1/8] quit [*P1] interface loopback1 [*P1-LoopBack1] isis ipv6 enable 1 [*P1-LoopBack1] quit [*P1] commit
# Configure P2.
[~P2] isis 1 [*P2-isis-1] is-level level-1 [*P2-isis-1] cost-style wide [*P2-isis-1] network-entity 10.0000.0000.0003.00 [*P2-isis-1] ipv6 enable topology ipv6 [*P2-isis-1] quit [*P2] interface gigabitethernet 0/1/0 [*P2-GigabitEthernet0/1/0] isis ipv6 enable 1 [*P2-GigabitEthernet0/1/0] quit [*P2] interface gigabitethernet 0/1/8 [*P2-GigabitEthernet0/1/8] isis ipv6 enable 1 [*P2-GigabitEthernet0/1/8] quit [*P2] interface loopback1 [*P2-LoopBack1] isis ipv6 enable 1 [*P2-LoopBack1] quit [*P2] commit
# Configure PE2.
[~PE2] isis 1 [*PE2-isis-1] is-level level-1 [*PE2-isis-1] cost-style wide [*PE2-isis-1] network-entity 10.0000.0000.0004.00 [*PE2-isis-1] ipv6 enable topology ipv6 [*PE2-isis-1] quit [*PE2] interface gigabitethernet 0/1/0 [*PE2-GigabitEthernet0/1/0] isis ipv6 enable 1 [*PE2-GigabitEthernet0/1/0] quit [*PE2] interface loopback1 [*PE2-LoopBack1] isis ipv6 enable 1 [*PE2-LoopBack1] quit [*PE2] commit
After the configuration is complete, perform the following operations to check whether IS-IS is successfully configured.
# Display IS-IS neighbor information. The following example uses the command output on PE1.
[~PE1] display isis peer Peer information for ISIS(1) System Id Interface Circuit Id State HoldTime Type PRI -------------------------------------------------------------------------------- 0000.0000.0002* GE0/1/0 0000.0000.0002.01 Up 8s L1 64 Total Peer(s): 1
- Configure an IPv4 L3VPN instance on each PE and bind the IPv4 L3VPN instance to an access-side interface.
# Configure 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 1:1 both [*PE1-vpn-instance-vpna-af-ipv4] quit [*PE1-vpn-instance-vpna] quit [*PE1] interface gigabitethernet0/1/8 [*PE1-GigabitEthernet0/1/8] ip binding vpn-instance vpna [*PE1-GigabitEthernet0/1/8] ip address 10.11.1.1 24 [*PE1-GigabitEthernet0/1/8] quit [*PE1] commit
# Configure 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 1:1 both [*PE2-vpn-instance-vpna-af-ipv4] quit [*PE2-vpn-instance-vpna] quit [*PE2] interface gigabitethernet0/1/8 [*PE2-GigabitEthernet0/1/8] ip binding vpn-instance vpna [*PE2-GigabitEthernet0/1/8] ip address 10.22.1.1 24 [*PE2-GigabitEthernet0/1/8] quit [*PE2] commit
- Establish EBGP peer relationships between the PEs and CEs.
# Configure CE1.
[~CE1] interface loopback 1 [*CE1-LoopBack1] ip address 11.1.1.1 32 [*CE1-LoopBack1] quit [*CE1] bgp 65410 [*CE1-bgp] router-id 11.1.1.1 [*CE1-bgp] peer 10.11.1.1 as-number 100 [*CE1-bgp] import-route direct [*CE1-bgp] quit [*CE1] commit
# Configure PE1.
[~PE1] bgp 100 [*PE1-bgp] router-id 1.1.1.1 [*PE1-bgp] ipv4-family vpn-instance vpna [*PE1-bgp-vpna] peer 10.11.1.2 as-number 65410 [*PE1-bgp-vpna] import-route direct [*PE1-bgp-vpna] commit [~PE1-bgp-vpna] quit [~PE1-bgp] quit
# Configure CE2.
[~CE2] interface loopback 1 [*CE2-LoopBack1] ip address 22.2.2.2 32 [*CE2-LoopBack1] quit [*CE2] bgp 65420 [*CE2-bgp] router-id 22.2.2.2 [*CE2-bgp] peer 10.22.1.1 as-number 100 [*CE2-bgp] import-route direct [*CE2-bgp] quit [*CE2] commit
# Configure PE2.
[~PE2] bgp 100 [*PE2-bgp] router-id 4.4.4.4 [*PE2-bgp] ipv4-family vpn-instance vpna [*PE2-bgp-vpna] peer 10.22.1.2 as-number 65420 [*PE2-bgp-vpna] import-route direct [*PE2-bgp-vpna] commit [~PE2-bgp-vpna] quit [~PE2-bgp] quit
After the configuration is complete, run the display bgp vpnv4 vpn-instance peer command on each PE to check whether a BGP peer relationship has been established between the PE and its connected CE. If the Established state is displayed in the command output, the BGP peer relationship has been established successfully.
The following example uses the command output on PE1 to show that a BGP peer relationship has been established between PE1 and CE1.
[~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 10.11.1.2 4 65410 79 83 0 01:33:24 Established 2 - Establish a BGP VPNv4 peer relationship between the PEs.
# Configure PE1.
[~PE1] bgp 100 [~PE1-bgp] peer 2001:DB8:4::4 as-number 100 [*PE1-bgp] peer 2001:DB8:4::4 connect-interface loopback 1 [*PE1-bgp] ipv4-family vpnv4 [*PE1-bgp-af-vpnv4] peer 2001:DB8:4::4 enable [*PE1-bgp-af-vpnv4] peer 2001:DB8:4::4 prefix-sid [*PE1-bgp-af-vpnv4] quit [*PE1-bgp] quit [*PE1] commit
# Configure PE2.
[~PE2] bgp 100 [~PE2-bgp] peer 2001:DB8:1::1 as-number 100 [*PE2-bgp] peer 2001:DB8:1::1 connect-interface loopback 1 [*PE2-bgp] ipv4-family vpnv4 [*PE1-bgp-af-vpnv4] peer 2001:DB8:1::1 enable [*PE1-bgp-af-vpnv4] peer 2001:DB8:1::1 prefix-sid [*PE2-bgp-af-vpnv4] quit [*PE2-bgp] quit [*PE2] commit
After the configuration is complete, run the display bgp vpnv4 all peer command on a PE to check whether a BGP VPNv4 peer relationship has been established between the PEs. If the Established state is displayed in the command output, the peer relationship has been established successfully.
The following example uses the command output on PE1.
[~PE1] display bgp vpnv4 all 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 2001:DB8:4::4 4 100 172 176 0 02:25:10 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 10.11.1.2 4 65410 3350 3344 0 0048h35m Established 2
- Configure SRv6 SIDs and configure the PEs to advertise VPN routes carrying SIDs.
# Configure 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:DB8:100:1:: 64 compress block 48 compress-static 8 static 32 [*PE1-segment-routing-ipv6-locator] opcode compress ::12 end psp-usp-usd [*PE1-segment-routing-ipv6-locator] opcode ::55 end-op [*PE1-segment-routing-ipv6-locator] quit [*PE1-segment-routing-ipv6] quit [*PE1] bgp 100 [*PE1-bgp] ipv4-family vpn-instance vpna [*PE1-bgp-vpna] segment-routing ipv6 traffic-engineer best-effort [*PE1-bgp-vpna] segment-routing ipv6 locator PE1 [*PE1-bgp-vpna] commit [~PE1-bgp-vpna] quit [~PE1-bgp] quit [~PE1] isis 1 [~PE1-isis-1] segment-routing ipv6 locator PE1 auto-sid-disable [*PE1-isis-1] commit [~PE1-isis-1] quit
# Configure P1.
[~P1] segment-routing ipv6 [*P1-segment-routing-ipv6] encapsulation source-address 2001:DB8:2::2 [*P1-segment-routing-ipv6] locator P1 ipv6-prefix 2001:DB8:100:2:: 64 compress block 48 compress-static 8 static 32 [*P1-segment-routing-ipv6-locator] opcode compress ::22 end psp-usp-usd-coc [*P1-segment-routing-ipv6-locator] quit [*P1-segment-routing-ipv6] quit [*P1] isis 1 [*P1-isis-1] segment-routing ipv6 locator P1 auto-sid-disable [*P1-isis-1] commit [~P1-isis-1] quit
# Configure P2.
[~P2] segment-routing ipv6 [*P2-segment-routing-ipv6] encapsulation source-address 2001:DB8:3::3 [*P2-segment-routing-ipv6] locator P2 ipv6-prefix 2001:DB8:100:3:: 64 compress block 48 compress-static 8 static 32 [*P2-segment-routing-ipv6-locator] opcode compress ::33 end psp-usp-usd-coc [*P2-segment-routing-ipv6-locator] quit [*P2-segment-routing-ipv6] quit [*P2] isis 1 [*P2-isis-1] segment-routing ipv6 locator P2 auto-sid-disable [*P2-isis-1] commit [~P2-isis-1] quit
# Configure PE2.
[~PE2] segment-routing ipv6 [*PE2-segment-routing-ipv6] encapsulation source-address 2001:DB8:4::4 [*PE2-segment-routing-ipv6] locator PE2 ipv6-prefix 2001:DB8:100:4:: 64 compress block 48 compress-static 8 static 32 [*PE2-segment-routing-ipv6-locator] opcode compress ::45 end psp-usp-usd [*PE2-segment-routing-ipv6-locator] opcode ::66 end-op [*PE2-segment-routing-ipv6-locator] quit [*PE2-segment-routing-ipv6] quit [*PE2] bgp 100 [*PE2-bgp] ipv4-family vpn-instance vpna [*PE2-bgp-vpna] segment-routing ipv6 traffic-engineer best-effort [*PE2-bgp-vpna] segment-routing ipv6 locator PE2 [*PE2-bgp-vpna] commit [~PE2-bgp-vpna] quit [~PE2-bgp] quit [~PE2] isis 1 [~PE2-isis-1] segment-routing ipv6 locator PE2 auto-sid-disable [*PE2-isis-1] commit [~PE2-isis-1] quit
After the configuration is complete, run the display segment-routing ipv6 locator [ locator-name ] verbose command to check SRv6 locator information.
The following example uses the command output on PE1.
[~PE1] display segment-routing ipv6 locator verbose Locator Configuration Table --------------------------- LocatorName : PE1 LocatorID : 1 IPv6Prefix : 2001:DB8:100:1:: PrefixLength : 64 Block : 2001:DB8:100:: BlockLength : 48 NodeID : 0:0:0:1:: NodeIdLength : 16 ComprStaticLen: 8 StaticLength : 32 ArgsLength : 0 Reference : 2 AutoCSIDPoolID: 8194 ComprDynLength: 8 AutoCSIDBegin : 2001:DB8:100:1:100:: AutoCSIDEnd : 2001:DB8:100:1:FFFF:: StaticCSIDBegin: 2001:DB8:100:1:1:: StaticCSIDEnd : 2001:DB8:100:1:FF:: AutoSIDPoolID : 8193 DynLength : 16 AutoSIDBegin : 2001:DB8:100:1:0:1:: AutoSIDEnd : 2001:DB8:100:1:0:FFFF:FFFF:FFFF StaticSIDBegin: 2001:DB8:100:1::1 StaticSIDEnd : 2001:DB8:100:1::FFFF:FFFF Total Locator(s): 1Run the display segment-routing ipv6 local-sid end forwarding command to check information about the SRv6 local SID table.
[~PE1] display segment-routing ipv6 local-sid end forwarding My Local-SID End Forwarding Table --------------------------------- SID : 2001:DB8:100:1:12::/80 FuncType : End Flavor : PSP USP USD LocatorName : PE1 LocatorID : 1 ProtocolType: STATIC ProcessID : -- UpdateTime : 2021-09-16 06:53:11.894 Total SID(s): 1 [~PE2] display segment-routing ipv6 local-sid end forwarding My Local-SID End Forwarding Table --------------------------------- SID : 2001:DB8:100:4:45::/80 FuncType : End Flavor : PSP USP USD LocatorName : PE2 LocatorID : 1 ProtocolType: STATIC ProcessID : -- UpdateTime : 2021-09-16 06:52:28.547 Total SID(s): 1 [~P1] display segment-routing ipv6 local-sid end forwarding My Local-SID End Forwarding Table --------------------------------- SID : 2001:DB8:100:2:22::/80 FuncType : End Flavor : PSP USP USD COC LocatorName : P1 LocatorID : 1 ProtocolType: STATIC ProcessID : -- UpdateTime : 2021-09-16 05:51:18.247 Total SID(s): 1 [~P2] display segment-routing ipv6 local-sid end forwarding My Local-SID End Forwarding Table --------------------------------- SID : 2001:DB8:100:3:33::/80 FuncType : End Flavor : PSP USP USD COC LocatorName : P2 LocatorID : 1 ProtocolType: STATIC ProcessID : -- UpdateTime : 2021-03-16 05:52:06.106 Total SID(s): 1
- Configure an SRv6 TE Policy.
# Configure PE1.
[~PE1] segment-routing ipv6 [~PE1-segment-routing-ipv6] segment-list list1 [*PE1-segment-routing-ipv6-segment-list-list1] index 5 sid ipv6 2001:DB8:100:2:22:: compress block 48 [*PE1-segment-routing-ipv6-segment-list-list1] index 10 sid ipv6 2001:DB8:100:3:33:: compress block 48 [*PE1-segment-routing-ipv6-segment-list-list1] index 15 sid ipv6 2001:DB8:100:4:45:: compress block 48 [*PE1-segment-routing-ipv6-segment-list-list1] commit [~PE1-segment-routing-ipv6-segment-list-list1] quit [~PE1-segment-routing-ipv6] srv6-te-policy locator PE1 [*PE1-segment-routing-ipv6] srv6-te policy policy1 endpoint 2001:DB8:4::4 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
# Configure PE2.
[~PE2] segment-routing ipv6 [~PE2-segment-routing-ipv6] segment-list list1 [*PE2-segment-routing-ipv6-segment-list-list1] index 5 sid ipv6 2001:DB8:100:3:33:: compress block 48 [*PE2-segment-routing-ipv6-segment-list-list1] index 10 sid ipv6 2001:DB8:100:2:22:: compress block 48 [*PE2-segment-routing-ipv6-segment-list-list1] index 15 sid ipv6 2001:DB8:100:1:12:: compress block 48 [*PE2-segment-routing-ipv6-segment-list-list1] commit [~PE2-segment-routing-ipv6-segment-list-list1] quit [~PE2-segment-routing-ipv6] srv6-te-policy locator PE2 [*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
After the configuration is complete, run the display srv6-te policy command to check SRv6 TE Policy information.
The following example uses the command output on PE1.
[~PE1] display srv6-te policy PolicyName : policy1 Color : 101 Endpoint : 2001:DB8:4::4 TunnelId : 1 Binding SID : - TunnelType : SRv6-TE Policy DelayTimerRemain : - Policy State : Up State Change Time : 2021-09-16 05:55:06 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 : 1 XcIndex : 1 List State : Up DelayTimerRemain : - Verification State : - SuppressTimeRemain : - PMTU : 9600 Active PMTU : 9600 Weight : 1 BFD State : - SID : 2001:DB8:100:2:22:: Block Length : 48 Compress Length : 128 2001:DB8:100:3:33:: Block Length : 48 Compress Length : 32 2001:DB8:100:4:45:: Block Length : 48 Compress Length : 32Run the ping srv6-te policy command on the headend of the SRv6 TE Policy to check the SRv6 TE Policy connectivity by initiating a ping operation. The following example uses the command output on PE1.
[~PE1] ping srv6-te policy policy-name policy1 end-op 2001:DB8:100:4::66 PING srv6-te policy : 100 data bytes, press CTRL_C to break srv6-te policy's segment list: Preference: 100; Path Type: primary; Protocol-Origin: local; Originator: 0, 0.0.0.0; Discriminator: 100; Segment-List ID: 1; Xcindex: 1; end-op: 2001:DB8:100:4::66 Reply from 2001:DB8:100:4::66 bytes=100 Sequence=1 time=4 ms Reply from 2001:DB8:100:4::66 bytes=100 Sequence=2 time=3 ms Reply from 2001:DB8:100:4::66 bytes=100 Sequence=3 time=3 ms Reply from 2001:DB8:100:4::66 bytes=100 Sequence=4 time=3 ms Reply from 2001:DB8:100:4::66 bytes=100 Sequence=5 time=3 ms --- srv6-te policy ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 3/3/4 ms - Configure a tunnel policy to import VPN traffic.
# Configure PE1.
[~PE1] route-policy p1 permit node 10 [*PE1-route-policy] apply extcommunity color 0:101 [*PE1-route-policy] quit [*PE1] bgp 100 [*PE1-bgp] ipv4-family vpnv4 [*PE1-bgp-af-vpnv4] peer 2001:DB8:4::4 route-policy p1 import [*PE1-bgp-af-vpnv4] quit [*PE1-bgp] quit [*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] ip vpn-instance vpna [*PE1-vpn-instance-vpna] ipv4-family [*PE1-vpn-instance-vpna-af-ipv4] tnl-policy p1 [*PE1-vpn-instance-vpna-af-ipv4] commit [~PE1-vpn-instance-vpna-af-ipv4] quit [~PE1-vpn-instance-vpna] quit
# Configure PE2.
[~PE2] route-policy p1 permit node 10 [*PE2-route-policy] apply extcommunity color 0:101 [*PE2-route-policy] quit [*PE2] bgp 100 [*PE2-bgp] ipv4-family vpnv4 [*PE2-bgp-af-vpnv4] peer 2001:DB8:1::1 route-policy p1 import [*PE2-bgp-af-vpnv4] quit [*PE2-bgp] quit [*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] ip vpn-instance vpna [*PE2-vpn-instance-vpna] ipv4-family [*PE2-vpn-instance-vpna-af-ipv4] tnl-policy p1 [*PE2-vpn-instance-vpna-af-ipv4] commit [~PE2-vpn-instance-vpna-af-ipv4] quit [~PE2-vpn-instance-vpna] quit
After the configuration is complete, run the display ip routing-table vpn-instance vpna command to check the IPv4 routing table of the specified VPN instance. The command output shows that the VPN route has successfully recursed to the SRv6 TE Policy.
The following example uses the command output on PE1.
[~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 10.11.1.0/24 Direct 0 0 D 10.11.1.1 GigabitEthernet0/1/8 10.11.1.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/1/8 10.11.1.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/1/8 10.22.1.0/24 IBGP 255 0 RD 2001:DB8:4::4 policy1 11.1.1.1/32 EBGP 255 0 RD 10.11.1.2 GigabitEthernet0/1/8 22.2.2.2/32 IBGP 255 0 RD 2001:DB8:4::4 policy1 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 [~PE1] display ip routing-table vpn-instance vpna 22.2.2.2 verbose Route Flags: R - relay, D - download to fib, T - to vpn-instance, B - black hole route ------------------------------------------------------------------------------ Routing Table : vpna Summary Count : 1 Destination: 22.2.2.2/32 Protocol: IBGP Process ID: 0 Preference: 255 Cost: 0 NextHop: 2001:DB8:4::4 Neighbour: 2001:DB8:4::4 State: Active Adv Relied Age: 02h39m41s Tag: 0 Priority: low Label: 3 QoSInfo: 0x0 IndirectID: 0x1000129 Instance: RelayNextHop: :: Interface: policy1 TunnelID: 0x000000003400000001 Flags: RD - Verify the configuration.
Check that CEs belonging to the same VPN instance can ping each other. For example:
[~CE1] ping -a 11.1.1.1 22.2.2.2 PING 22.2.2.2: 56 data bytes, press CTRL_C to break Reply from 22.2.2.2: bytes=56 Sequence=1 ttl=253 time=4 ms Reply from 22.2.2.2: bytes=56 Sequence=2 ttl=253 time=4 ms Reply from 22.2.2.2: bytes=56 Sequence=3 ttl=253 time=3 ms Reply from 22.2.2.2: bytes=56 Sequence=4 ttl=253 time=4 ms Reply from 22.2.2.2: bytes=56 Sequence=5 ttl=253 time=3 ms --- 22.2.2.2 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 3/3/4 ms
Configuration Files
- PE1 configuration file
# sysname PE1 # ip vpn-instance vpna ipv4-family route-distinguisher 100:1 tnl-policy p1 apply-label per-instance vpn-target 1:1 export-extcommunity vpn-target 1:1 import-extcommunity # segment-routing ipv6 encapsulation source-address 2001:DB8:1::1 locator PE1 ipv6-prefix 2001:DB8:100:1:: 64 compress block 48 compress-static 8 static 32 opcode compress ::12 end psp-usp-usd opcode ::55 end-op srv6-te-policy locator PE1 segment-list list1 index 5 sid ipv6 2001:DB8:100:2:22:: compress block 48 index 10 sid ipv6 2001:DB8:100:3:33:: compress block 48 index 15 sid ipv6 2001:DB8:100:4:45:: compress block 48 srv6-te policy policy1 endpoint 2001:DB8:4::4 color 101 candidate-path preference 100 segment-list list1 # isis 1 is-level level-1 cost-style wide network-entity 10.0000.0000.0001.00 # ipv6 enable topology ipv6 segment-routing ipv6 locator PE1 auto-sid-disable # # interface GigabitEthernet0/1/8 undo shutdown ip binding vpn-instance vpna ip address 10.11.1.1 255.255.255.0 # interface GigabitEthernet0/1/0 undo shutdown ipv6 enable ipv6 address 2001:DB8:10::1/64 isis ipv6 enable 1 # interface LoopBack1 ipv6 enable ipv6 address 2001:DB8:1::1/128 isis ipv6 enable 1 # bgp 100 router-id 1.1.1.1 peer 2001:DB8:4::4 as-number 100 peer 2001:DB8:4::4 connect-interface LoopBack1 # ipv4-family unicast undo synchronization # ipv4-family vpnv4 policy vpn-target peer 2001:DB8:4::4 enable peer 2001:DB8:4::4 route-policy p1 import peer 2001:DB8:4::4 prefix-sid # ipv4-family vpn-instance vpna import-route direct segment-routing ipv6 locator PE1 segment-routing ipv6 traffic-engineer best-effort peer 10.11.1.2 as-number 65410 # route-policy p1 permit node 10 apply extcommunity color 0:101 # tunnel-policy p1 tunnel select-seq ipv6 srv6-te-policy load-balance-number 1 # return
P1 configuration file
# sysname P1 # segment-routing ipv6 encapsulation source-address 2001:DB8:2::2 locator P1 ipv6-prefix 2001:DB8:100:2:: 64 compress block 48 compress-static 8 static 32 opcode compress ::22 end psp-usp-usd-coc # isis 1 is-level level-1 cost-style wide network-entity 10.0000.0000.0002.00 # ipv6 enable topology ipv6 segment-routing ipv6 locator P1 auto-sid-disable # # interface GigabitEthernet0/1/0 undo shutdown ipv6 enable ipv6 address 2001:DB8:10::2/64 isis ipv6 enable 1 # interface GigabitEthernet0/1/8 undo shutdown ipv6 enable ipv6 address 2001:DB8:20::1/64 isis ipv6 enable 1 # interface LoopBack1 ipv6 enable ipv6 address 2001:DB8:2::2/128 isis ipv6 enable 1 # return
P2 configuration file
# sysname P2 # segment-routing ipv6 encapsulation source-address 2001:DB8:3::3 locator P2 ipv6-prefix 2001:DB8:100:3:: 64 compress block 48 compress-static 8 static 32 opcode compress ::33 end psp-usp-usd-coc # isis 1 is-level level-1 cost-style wide network-entity 10.0000.0000.0003.00 # ipv6 enable topology ipv6 segment-routing ipv6 locator P2 auto-sid-disable # # interface GigabitEthernet0/1/0 undo shutdown ipv6 enable ipv6 address 2001:DB8:20::2/64 isis ipv6 enable 1 # interface GigabitEthernet0/1/8 undo shutdown ipv6 enable ipv6 address 2001:DB8:30::1/64 isis ipv6 enable 1 # interface LoopBack1 ipv6 enable ipv6 address 2001:DB8:3::3/128 isis ipv6 enable 1 # return
PE2 configuration file
# sysname PE2 # ip vpn-instance vpna ipv4-family route-distinguisher 200:1 tnl-policy p1 apply-label per-instance vpn-target 1:1 export-extcommunity vpn-target 1:1 import-extcommunity # segment-routing ipv6 encapsulation source-address 2001:DB8:4::4 locator PE2 ipv6-prefix 2001:DB8:100:4:: 64 compress block 48 compress-static 8 static 32 opcode compress ::45 end psp-usp-usd opcode ::66 end-op srv6-te-policy locator PE2 segment-list list1 index 5 sid ipv6 2001:DB8:100:3:33:: compress block 48 index 10 sid ipv6 2001:DB8:100:2:22:: compress block 48 index 15 sid ipv6 2001:DB8:100:1:12:: compress block 48 srv6-te policy policy1 endpoint 2001:DB8:1::1 color 101 candidate-path preference 100 segment-list list1 # isis 1 is-level level-1 cost-style wide network-entity 10.0000.0000.0004.00 # ipv6 enable topology ipv6 segment-routing ipv6 locator PE2 auto-sid-disable # # interface GigabitEthernet0/1/0 undo shutdown ipv6 enable ipv6 address 2001:DB8:30::2/64 isis ipv6 enable 1 # interface GigabitEthernet0/1/8 undo shutdown ip binding vpn-instance vpna ip address 10.22.1.1 255.255.255.0 # interface LoopBack1 ipv6 enable ipv6 address 2001:DB8:4::4/128 isis ipv6 enable 1 # bgp 100 router-id 4.4.4.4 peer 2001:DB8:1::1 as-number 100 peer 2001:DB8:1::1 connect-interface LoopBack1 # ipv4-family unicast undo synchronization # ipv4-family vpnv4 policy vpn-target peer 2001:DB8:1::1 enable peer 2001:DB8:1::1 route-policy p1 import peer 2001:DB8:1::1 prefix-sid # ipv4-family vpn-instance vpna import-route direct segment-routing ipv6 locator PE2 segment-routing ipv6 traffic-engineer best-effort peer 10.22.1.2 as-number 65420 # route-policy p1 permit node 10 apply extcommunity color 0:101 # tunnel-policy p1 tunnel select-seq ipv6 srv6-te-policy load-balance-number 1 # return
CE1 configuration file
# sysname CE1 # interface GigabitEthernet0/1/0 undo shutdown ip address 10.11.1.2 255.255.255.0 # interface LoopBack1 ip address 11.1.1.1 32 # bgp 65410 router-id 11.1.1.1 peer 10.11.1.1 as-number 100 # ipv4-family unicast undo synchronization import-route direct peer 10.11.1.1 enable # returnCE2 configuration file
# sysname CE2 # interface GigabitEthernet0/1/0 undo shutdown ip address 10.22.1.2 255.255.255.0 # interface LoopBack1 ip address 22.2.2.2 32 # bgp 65420 router-id 22.2.2.2 peer 10.22.1.1 as-number 100 # ipv4-family unicast undo synchronization import-route direct peer 10.22.1.1 enable # return