375 
Ste
 Command
Remarks 
8.  Enable BFD for IPv6 IS-IS. 
isis ipv6 bfd enable 
By default, BFD for IPv6 IS-IS is 
disabled. 
 
Displaying and maintaining IPv6 IS-IS 
Execute display commands in any view. For other display and reset commands, see "Configuring IS-IS." 
 
Task Command
Display information about routes 
redistributed by IPv6 IS-IS. 
display isis redistribute ipv6 [ ipv6-address mask-length ] 
[ level-1 | level-2 ] [ process-id ] 
Display IPv6 IS-IS routing information. 
display isis route ipv6 [ ipv6-address ] [ [ level-1 | level-2 ] | 
verbose ] * [ process-id ] 
Display IPv6 IS-IS topology information. 
display isis spf-tree ipv6 [ [ level-1 | level-2 ] | verbose ] * 
[ process-id ] 
IPv6 IS-IS configuration examples 
IPv6 IS-IS basic configuration example 
Network requirements 
As shown in Figure 92, Router A, Router B, Router C, and Router D, all enabled with IPv6, reside in the 
same AS. Configure IPv6 IS-IS on the routers so that they can reach each other. 
Router A and Router B are Level-1 routers, Router D is a Level-2 router, and Router C is a Level-1-2 router.  
Figure 92 Network diagram 
 
Device  Interface  IPv6 address  Device  Interface  IPv6 address 
Router A  Eth
1/1 2001:1::2/64
Router B
Eth
1/1
2001:2::2/64
Router C  Eth1/1  2001:2::1/64
Router
D
Eth1/1
2001:3::2/64
 Eth1/2 2001:1::1/64   Eth1/2 2001:4::1/64 
 Eth1/3 2001:3::1/64
 
 
Eth1/1
2001:3::2/64
Router D
L2
Area 20
Router B
L1
Router C
L1/L2
Eth1/1
2001:1::2/64
Eth1/2
2001:1::1/64
Eth1/1
2001:2::1/64
Eth1/1
2001:2::2/64
Eth1/3
2001:3::1/64
Router A
L1
Area 10
Eth1/2
2001:4::1/64