3com S7906E Guide De Référence

 

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The overload bit is not set by default.  

Note that: 

z 

If the on-startup keyword is not specified, the command sets the overload bit immediately until the 

undo set-overload command is executed. 

z 

If the on-startup keyword is specified, IS-IS sets the overload bit upon system startup and keeps it 

set within the timeout2 interval. 

z 

If both on-startup and start-from-nbr  system-id are specified, IS-IS sets the overload bit from 

system startup to when the neighbor relationship with the specified neighbor is formed within the 

nbr-timeout interval, and from then on, IS-IS keeps the overload bit set within the timeout1 interval. 

If the neighbor relationship with the specified neighbor is not formed within the nbr-timeout interval, 

the overload bit is cleared. 

# Set overload flag on the current router.  

<Sysname> system-view 

[Sysname] isis 

[Sysname-isis-1] set-overload 

summary  ip-address  {  mask  |  mask-length  } [ avoid-feedback | generate_null0_route | [ level-1  | 

level-1-2 | level-2 ] | tag tag ] * 

undo summary ip-address { mask | mask-length } [ level-1 | level-1-2 | level-2 ] 

IS-IS view 

2: System level 

ip-address: Destination IP address of the summary route.  

mask: Mask of the destination IP address, in dotted decimal format.  

mask-length: Mask length, in the range of 0 to 32. 

avoid-feedback: Avoids learning summary routes by route calculation.  

generate_null0_route: Generate the Null 0 route to avoid routing loops.  

level-1: Summarize only the routes redistributed to Level-1.  

level-1-2: Summarizes the routes redistributed to both Level-1 and Level-2.  

level-2: Summarizes only the routes redistributed to Level-2.  

tag tag: Specifies a management tag, in the range of 1 to 4294967295.  

Use the summary command to configure a summary route.