Example for Configuring the Shortcut Function for SRv6 TE Policies
This section provides an example for configuring the shortcut function for SRv6 TE Policies.
Networking Requirements
On the network shown in Figure 1:
All devices are Level-1 devices that belong to IS-IS process 1.
- A bidirectional SRv6 TE Policy is deployed along the path PE1-P1-PE2.
It is required that IS-IS routes recurse to the SRv6 TE Policy between PE1 and PE2 for traffic forwarding.
Precautions
- To ensure that the shortcut function is correctly configured, the endpoint of the SRv6 TE Policy configured on the local device must be the same as the global TE IPv6 router ID advertised by IS-IS on the remote device.
- During SRv6 TE Policy configuration, ensure that the last SID of the SRv6 TE Policy has the USD capability. Otherwise, a forwarding error will occur.
- In SRv6 TE Policy shortcut scenarios, the Encaps or Insert-Encaps mode must be set for the corresponding SRv6 TE Policy.
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 SRv6 SIDs and enable IS-IS SRv6 on PE1, P1, and PE2.
Deploy an SRv6 TE Policy between PE1 and PE2.
- Configure the shortcut function for the SRv6 TE Policy on PE1 and PE2.
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
- Global TE IPv6 router ID of 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:DB8:11::1 96 [*PE1-GigabitEthernet0/1/0] quit [*PE1] interface gigabitethernet 0/1/16 [*PE1-GigabitEthernet0/1/16] ipv6 enable [*PE1-GigabitEthernet0/1/16] ipv6 address 2001:DB8:13::1 96 [*PE1-GigabitEthernet0/1/16] 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 DeviceA.
[~DeviceA] isis 1 [*DeviceA-isis-1] is-level level-1 [*DeviceA-isis-1] cost-style wide [*DeviceA-isis-1] network-entity 10.0000.0000.0005.00 [*DeviceA-isis-1] ipv6 enable topology ipv6 [*DeviceA-isis-1] quit [*DeviceA] interface gigabitethernet 0/1/0 [*DeviceA-GigabitEthernet0/1/0] isis ipv6 enable 1 [*DeviceA-GigabitEthernet0/1/0] quit [*DeviceA] interface loopback1 [*DeviceA-LoopBack1] isis ipv6 enable 1 [*DeviceA-LoopBack1] commit [~DeviceA-LoopBack1] quit
# 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 gigabitethernet 0/1/16 [*PE1-GigabitEthernet0/1/16] isis ipv6 enable 1 [*PE1-GigabitEthernet0/1/16] quit [*PE1] interface loopback1 [*PE1-LoopBack1] isis ipv6 enable 1 [*PE1-LoopBack1] commit [~PE1-LoopBack1] quit
# 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] commit [~P1-LoopBack1] quit
# Configure PE2.
[~PE2] isis 1 [*PE2-isis-1] is-level level-1 [*PE2-isis-1] cost-style wide [*PE2-isis-1] network-entity 10.0000.0000.0003.00 [*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 gigabitethernet 0/1/16 [*PE2-GigabitEthernet0/1/16] isis ipv6 enable 1 [*PE2-GigabitEthernet0/1/16] quit [*PE2] interface loopback1 [*PE2-LoopBack1] isis ipv6 enable 1 [*PE2-LoopBack1] commit [~PE2-LoopBack1] quit
# Configure P2.
[~P2] isis 1 [*P2-isis-1] is-level level-1 [*P2-isis-1] cost-style wide [*P2-isis-1] network-entity 10.0000.0000.0004.00 [*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] commit [~P2-LoopBack1] quit
# Configure DeviceB.
[~DeviceB] isis 1 [*DeviceB-isis-1] is-level level-1 [*DeviceB-isis-1] cost-style wide [*DeviceB-isis-1] network-entity 10.0000.0000.0006.00 [*DeviceB-isis-1] ipv6 enable topology ipv6 [*DeviceB-isis-1] quit [*DeviceB] interface gigabitethernet 0/1/0 [*DeviceB-GigabitEthernet0/1/0] isis ipv6 enable 1 [*DeviceB-GigabitEthernet0/1/0] quit [*DeviceB] interface loopback1 [*DeviceB-LoopBack1] isis ipv6 enable 1 [*DeviceB-LoopBack1] commit [~DeviceB-LoopBack1] quit
After the configuration is complete, run the display isis peer command to check whether IS-IS has been configured successfully.
- Configure SRv6 SIDs.
# Configure PE1.
[~PE1] segment-routing ipv6 [*PE1-segment-routing-ipv6] encapsulation source-address 2001:DB8:1::1 [*PE1-segment-routing-ipv6] locator as1 ipv6-prefix 2001:DB8:100:: 64 static 32 [*PE1-segment-routing-ipv6-locator] opcode ::100 end psp-usp-usd [*PE1-segment-routing-ipv6-locator] quit [*PE1-segment-routing-ipv6] quit [*PE1] isis 1 [*PE1-isis-1] segment-routing ipv6 locator as1 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 as1 ipv6-prefix 2001:DB8:200:: 64 static 32 [*P1-segment-routing-ipv6-locator] opcode ::100 end psp-usp-usd [*P1-segment-routing-ipv6-locator] quit [*P1-segment-routing-ipv6] quit [*P1] isis 1 [*P1-isis-1] segment-routing ipv6 locator as1 auto-sid-disable [*P1-isis-1] commit [~P1-isis-1] quit
# Configure PE2.
[~PE2] segment-routing ipv6 [*PE2-segment-routing-ipv6] encapsulation source-address 2001:DB8:3::3 [*PE2-segment-routing-ipv6] locator as1 ipv6-prefix 2001:DB8:300:: 64 static 32 [*PE2-segment-routing-ipv6-locator] opcode ::100 end psp-usp-usd [*PE2-segment-routing-ipv6-locator] quit [*PE2-segment-routing-ipv6] quit [*PE2] isis 1 [*PE2-isis-1] segment-routing ipv6 locator as1 auto-sid-disable [*PE2-isis-1] commit [~PE2-isis-1] quit
Run 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::100/128 FuncType : End Flavor : PSP USP USD LocatorName : as1 LocatorID : 1 ProtocolType: STATIC ProcessID : -- UpdateTime : 2021-05-05 09:24:18.785 Total SID(s): 1 [~P1] display segment-routing ipv6 local-sid end forwarding My Local-SID End Forwarding Table --------------------------------- SID : 2001:DB8:200::100/128 FuncType : End Flavor : PSP USP USD LocatorName : as1 LocatorID : 1 ProtocolType: STATIC ProcessID : -- UpdateTime : 2021-05-05 09:29:22.633 Total SID(s): 1 [~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 USP USD LocatorName : as1 LocatorID : 1 ProtocolType: STATIC ProcessID : -- UpdateTime : 2021-05-05 09:36:31.017 Total SID(s): 1
- Configure an SRv6 TE Policy.
# Configure PE1.
[~PE1] te ipv6-router-id 2001:DB8:1::1 [*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 locator as1 [*PE1-segment-routing-ipv6] srv6-te policy policy1 endpoint 2001:DB8:3::3 color 10 [*PE1-segment-routing-ipv6-policy-policy1] encapsulation-mode encaps [*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] quit [*PE1-segment-routing-ipv6-policy-policy1] quit [*PE1-segment-routing-ipv6] commit
# Configure PE2.
[~PE2] te ipv6-router-id 2001:DB8:3::3 [*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 locator as1 [*PE2-segment-routing-ipv6] srv6-te policy policy1 endpoint 2001:DB8:1::1 color 10 [*PE2-segment-routing-ipv6-policy-policy1] encapsulation-mode encaps [*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] quit [*PE2-segment-routing-ipv6-policy-policy1] quit [*PE2-segment-routing-ipv6] commit
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 : 10 Endpoint : 2001:DB8:3::3 TunnelId : 1 Binding SID : - TunnelType : SRv6-TE Policy DelayTimerRemain : - Policy State : Up State Change Time : 2021-06-10 12:06:45 Admin State : Up Traffic Statistics : Disable Backup Hot-Standby : Disable BFD : Disable Interface Index : - Interface Name : - Interface State : - Encapsulation Mode : Encaps 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 : 2001:DB8:100::900 GroupId : 1 Policy Name : policy1 Template ID : 0 Path Verification : Disable DelayTimerRemain : - Network Slice ID : - Compute Source : - 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 : - Network Slice ID : - Compute Source : - SID : 2001:DB8:200::100 2001:DB8:300::100 - Configure the shortcut function for the SRv6 TE Policy.
# Configure PE1.
[~PE1] ip ipv6-prefix p1 permit 2001:DB8:20:: 96 [*PE1] ip ipv6-prefix p1 permit 2001:DB8:6::6 128 [*PE1] route-policy rp1 permit node 10 [*PE1-route-policy] if-match ipv6 address prefix-list p1 [*PE1-route-policy] quit [*PE1] segment-routing ipv6 [*PE1-segment-routing-ipv6] srv6-te policy policy1 [*PE1-segment-routing-ipv6-policy-policy1] igp shortcut isis route-policy rp1 [*PE1-segment-routing-ipv6-policy-policy1] isis ipv6 enable 1 [*PE1-segment-routing-ipv6-policy-policy1] igp metric relative -1 [*PE1-segment-routing-ipv6-policy-policy1] quit [*PE1-segment-routing-ipv6] commit [~PE1-segment-routing-ipv6] quit
# Configure PE2.
[~PE2] ip ipv6-prefix p1 permit 2001:DB8:10:: 96 [*PE2] ip ipv6-prefix p1 permit 2001:DB8:5::5 128 [*PE2] route-policy rp1 permit node 10 [*PE2-route-policy] if-match ipv6 address prefix-list p1 [*PE2-route-policy] quit [*PE2] segment-routing ipv6 [*PE2-segment-routing-ipv6] srv6-te policy policy1 [*PE2-segment-routing-ipv6-policy-policy1] igp shortcut isis route-policy rp1 [*PE2-segment-routing-ipv6-policy-policy1] isis ipv6 enable 1 [*PE2-segment-routing-ipv6-policy-policy1] igp metric relative -1 [*PE2-segment-routing-ipv6-policy-policy1] quit [*PE2-segment-routing-ipv6] commit [~PE2-segment-routing-ipv6] quit
After the configuration is complete, run the display isis route ipv6 command to check IS-IS routing information.
The following example uses the command output on PE1.
[~PE1] display isis route ipv6 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 GE0/1/0 FE80::3AB0:9EFF:FE31:307 10 A/-/-/- 2001:DB8:3::3/128 GE0/1/0 FE80::3AB0:9EFF:FE31:307 10 A/-/-/- 2001:DB8:5::5/128 GE0/1/8 FE80::3AB0:9EFF:FE21:300 10 A/-/-/- 2001:DB8:6::6/128 SRv6TE-Policy-5 :: 25 A/S/-/- 2001:DB8:10::/96 GE0/1/8 Direct 10 D/-/L/- 2001:DB8:11::/96 GE0/1/0 Direct 10 D/-/L/- 2001:DB8:12::/96 GE0/1/0 FE80::3AB0:9EFF:FE31:307 20 A/-/-/- 2001:DB8:20::/96 SRv6TE-Policy-5 :: 25 A/S/-/- 2001:DB8:100::/64 NULL0 - 0 A/-/L/- 2001:DB8:200::/64 GE0/1/0 FE80::3AB0:9EFF:FE31:307 10 A/-/-/- 2001:DB8:300::/64 GE0/1/0 FE80::3AB0:9EFF:FE31:307 15 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 ProtectRun the display ipv6 routing-table brief command to check IPv6 routing information.
The following example uses the command output on PE1.
[~PE1] display ipv6 routing-table brief Route Flags: R - relay, D - download to fib, T - to vpn-instance, B - black hole route ------------------------------------------------------------------------------ Routing Table : _public_ Destinations : 18 Routes : 18 Format : Destination/Mask Protocol Nexthop Interface ------------------------------------------------------------------------------ ::1/128 Direct ::1 InLoopBack0 ::FFFF:127.0.0.0/104 Direct ::FFFF:127.0.0.1 InLoopBack0 ::FFFF:127.0.0.1/128 Direct ::1 InLoopBack0 2001:DB8:1::1/128 Direct ::1 LoopBack1 2001:DB8:2::2/128 ISIS-L1 FE80::3AB0:9EFF:FE31:307 GE0/1/0 2001:DB8:3::3/128 ISIS-L1 FE80::3AB0:9EFF:FE31:307 GE0/1/0 2001:DB8:5::5/128 ISIS-L1 FE80::3AB0:9EFF:FE21:300 GE0/1/8 2001:DB8:6::6/128 ISIS-L1 :: SRv6TE-Policy-5 2001:DB8:10::/96 Direct 2001:DB8:10::1 GE0/1/8 2001:DB8:10::1/128 Direct ::1 GE0/1/8 2001:DB8:11::/96 Direct 2001:DB8:11::1 GE0/1/0 2001:DB8:11::1/128 Direct ::1 GE0/1/0 2001:DB8:12::/96 ISIS-L1 FE80::3AB0:9EFF:FE31:307 GE0/1/0 2001:DB8:20::/96 ISIS-L1 :: SRv6TE-Policy-5 2001:DB8:100::/64 ISIS-L1 :: NULL0 2001:DB8:200::/64 ISIS-L1 FE80::3AB0:9EFF:FE31:307 GE0/1/0 2001:DB8:300::/64 ISIS-L1 FE80::3AB0:9EFF:FE31:307 GE0/1/0 FE80::/10 Direct :: NULL0Because the IGP metric value of the shortcut route of the SRv6 TE Policy is less than that of a common route, the outbound interface of the route 2001:DB8:6::6/128 on PE1 is the SRv6 TE Policy.
Configuration Files
PE1 configuration file
# sysname PE1 # te ipv6-router-id 2001:DB8:1::1 # segment-routing ipv6 encapsulation source-address 2001:DB8:1::1 locator as1 ipv6-prefix 2001:DB8:100:: 64 static 32 opcode ::100 end psp-usp-usd srv6-te-policy locator as1 segment-list list1 index 5 sid ipv6 2001:DB8:200::100 index 10 sid ipv6 2001:DB8:300::100 srv6-te policy policy1 endpoint 2001:DB8:3::3 color 10 encapsulation-mode encaps igp shortcut isis route-policy rp1 isis ipv6 enable 1 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 as1 auto-sid-disable # # interface GigabitEthernet0/1/0 undo shutdown ipv6 enable ipv6 address 2001:DB8:11::1/96 isis ipv6 enable 1 # interface GigabitEthernet0/1/8 undo shutdown ipv6 enable ipv6 address 2001:DB8:10::1/96 isis ipv6 enable 1 # interface GigabitEthernet0/1/16 undo shutdown ipv6 enable ipv6 address 2001:DB8:13::1/96 isis ipv6 enable 1 # interface LoopBack1 ipv6 enable ipv6 address 2001:DB8:1::1/128 isis ipv6 enable 1 # route-policy rp1 permit node 10 if-match ipv6 address prefix-list p1 # ip ipv6-prefix p1 index 10 permit 2001:DB8:20:: 96 ip ipv6-prefix p1 index 20 permit 2001:DB8:6::6 128 # return
P1 configuration file
# sysname P1 # segment-routing ipv6 encapsulation source-address 2001:DB8:2::2 locator as1 ipv6-prefix 2001:DB8:200:: 64 static 32 opcode ::100 end psp-usp-usd # isis 1 is-level level-1 cost-style wide network-entity 10.0000.0000.0002.00 # ipv6 enable topology ipv6 segment-routing ipv6 locator as1 auto-sid-disable # # interface GigabitEthernet0/1/0 undo shutdown ipv6 enable ipv6 address 2001:DB8:11::2/96 isis ipv6 enable 1 # interface GigabitEthernet0/1/8 undo shutdown ipv6 enable ipv6 address 2001:DB8:12::1/96 isis ipv6 enable 1 # interface LoopBack1 ipv6 enable ipv6 address 2001:DB8:2::2/128 isis ipv6 enable 1 # return
PE2 configuration file
# sysname PE2 # te ipv6-router-id 2001:DB8:3::3 # segment-routing ipv6 encapsulation source-address 2001:DB8:3::3 locator as1 ipv6-prefix 2001:DB8:300:: 64 static 32 opcode ::100 end psp-usp-usd srv6-te-policy locator as1 segment-list list1 index 5 sid ipv6 2001:DB8:200::100 index 10 sid ipv6 2001:DB8:100::100 srv6-te policy policy1 endpoint 2001:DB8:1::1 color 10 encapsulation-mode encaps igp shortcut isis route-policy rp1 isis ipv6 enable 1 candidate-path preference 100 segment-list list1 # isis 1 is-level level-1 cost-style wide network-entity 10.0000.0000.0003.00 # ipv6 enable topology ipv6 segment-routing ipv6 locator as1 auto-sid-disable # # interface GigabitEthernet0/1/0 undo shutdown ipv6 enable ipv6 address 2001:DB8:12::2/96 isis ipv6 enable 1 # interface GigabitEthernet0/1/8 undo shutdown ipv6 enable ipv6 address 2001:DB8:20::1/96 isis ipv6 enable 1 # interface GigabitEthernet0/1/16 undo shutdown ipv6 enable ipv6 address 2001:DB8:14::2/96 isis ipv6 enable 1 # interface LoopBack1 ipv6 enable ipv6 address 2001:DB8:3::3/128 isis ipv6 enable 1 # route-policy rp1 permit node 10 if-match ipv6 address prefix-list p1 # ip ipv6-prefix p1 index 10 permit 2001:DB8:10:: 96 ip ipv6-prefix p1 index 20 permit 2001:DB8:5::5 128 # return
P2 configuration file
# sysname P2 # isis 1 is-level level-1 cost-style wide network-entity 10.0000.0000.0004.00 # ipv6 enable topology ipv6 # # interface GigabitEthernet0/1/0 undo shutdown ipv6 enable ipv6 address 2001:DB8:13::2/96 isis ipv6 enable 1 # interface GigabitEthernet0/1/8 undo shutdown ipv6 enable ipv6 address 2001:DB8:14::1/96 isis ipv6 enable 1 # interface LoopBack1 ipv6 enable ipv6 address 2001:DB8:4::4/128 isis ipv6 enable 1 # return
DeviceA configuration file
# sysname DeviceA # isis 1 is-level level-1 cost-style wide network-entity 10.0000.0000.0005.00 # ipv6 enable topology ipv6 # # interface GigabitEthernet0/1/0 undo shutdown ipv6 enable ipv6 address 2001:DB8:10::2/96 isis ipv6 enable 1 # interface LoopBack1 ipv6 enable ipv6 address 2001:DB8:5::5/128 isis ipv6 enable 1 # returnDeviceB configuration file
# sysname DeviceB # isis 1 is-level level-1 cost-style wide network-entity 10.0000.0000.0006.00 # ipv6 enable topology ipv6 # # interface GigabitEthernet0/1/0 undo shutdown ipv6 enable ipv6 address 2001:DB8:20::2/96 isis ipv6 enable 1 # interface LoopBack1 ipv6 enable ipv6 address 2001:DB8:6::6/128 isis ipv6 enable 1 # return