3com S7906E Guide De Référence

 

1-11 

[Sysname] isis 

[Sysname-isis-1] ipv6 preference 20 

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 ] 

IS-IS view 

2: System level 

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.  

 

If no level is specified in the command, the default is level-2.  

 

Use the ipv6 summary command to configure an IPv6 IS-IS summary route.  

Use the undo ipv6 summary command to remove the summary route.  

Route summarization is disabled by default.  

Configuring summary routes can reduce the size of the route table, LSPs and LSDB. Routes to be 

summarized can be IS-IS routes or redistributed routes. The cost of a summary route is the smallest 

cost among all summarized routes.  

# Configure a summary route of 2002::/32.  

<Sysname> system-view 

[Sysname] isis