Command Manual – IPv6 Routing
H3C S7500E Series Ethernet Switches Chapter 4 IPv6 IS-IS Configuration Commands
4-11
same destination, the route found by the protocol with the highest preference is
selected.
Examples
# Configure the preference of IPv6 IS-IS protocol as 20.
<Sysname> system-view
[Sysname] isis
[Sysname-isis-1] ipv6 preference 20
4.1.10 ipv6 summary
Syntax
ipv6 summary ipv6-prefix prefix-length [ avoid-feedback | generate_null0_route |
[ level-1 | level-1-2 | level-2 ] | tag tag ] *
undo ipv6 summary ipv6-prefix prefix-length [ level-1 | level-1-2 | level-2 ]
View
IS-IS view
Parameters
ipv6-prefix: IPv6 prefix of the summary route.
prefix-length: Length of the IPv6 prefix, in the range of 0 to 128.
avoid-feedback: Specifies to avoid learning summary routes via routing calculation.
generate_null0_route: Generates the NULL 0 route to avoid routing loops.
level-1: Specifies to summarize only the routes redistributed to Level-1 area.
level-1-2: Specifies to summarize all the routes redistributed to Level-1 and Level-2
areas.
level-2: Specifies to summarize only the routes redistributed to Level-2 area.
tag: Value of a administrative tag, in the range of 1 to 4294967295.
 Note:
If no level is specified in the command, the default is level-2.
Description
Use the ipv6 summary command to configure an IPv6 IS-IS summary route.
Use the undo ipv6 summary command to remove the summary route.
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