3com S7906E Guide De Référence

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Parameters 
interval-value: Graceful Restart interval, in the range 30 to 1800 seconds. 
Description 
Use the graceful-restart interval command to configure the Graceful Restart interval. 
Use the undo graceful-restart interval command to restore the default Graceful Restart interval. 
By default, the Graceful Restart interval is 300 seconds. 
Examples 
# Configure the Graceful Restart interval for IS-IS process 1 as 120 seconds. 
<Sysname> system-view 
[Sysname] isis 1 
[Sysname-isis-1] graceful-restart interval 120 
graceful-restart suppress-sa 
Syntax 
graceful-restart suppress-sa 
undo graceful-restart suppress-sa 
View 
IS-IS view 
Default Level 
2: System level 
Parameters 
None 
Description 
Use the graceful-restart  suppress-sa command to suppress the SA (Suppress-Advertisement) bit 
during restart.  
Use the undo graceful-restart suppress-sa command to set the SA bit.   
By default, the SA bit is set during restart. 
Suppressing the SA bit is mainly for avoiding black hole route. If a router starts or reboots without 
keeping the local forwarding table, sending packets to the router may result in a severe packet loss. To 
avoid this, you can set the SA bit of the hello packet sent by the GR Restarter to 1. Upon receiving such 
hello packets, the GR Helpers will not advertise the GR Restarter through LSP.  
Examples 
# Suppress the SA bit during Graceful Restart. 
<Sysname> system-view 
[Sysname] isis 1 
[Sysname-isis-1] graceful-restart suppress-sa