R3303-HP HSR6800 Routers Layer 3 - IP Routing Command Reference

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graceful-restart suppress-sa
Use graceful-restart suppress-sa to suppress the SA (Suppress-Advertisement) bit during restart.
Use undo graceful-restart suppress-sa to set the SA bit.
Syntax
graceful-restart suppress-sa
undo graceful-restart suppress-sa
Default
The SA bit is set during restart.
Views
IS-IS view
Default command level
2: System level
Usage guidelines
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 might 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 do 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
import-route (IS-IS view)
Use import-route to redistribute routes from another routing protocol or another IS-IS process.
Use undo import-route to disable route redistribution from another routing protocol or another IS-IS
process.
Syntax
[ ipv4-unicast topology-name ] import-route protocol [ process-id | all-processes | allow-ibgp ] [ cost
cost | cost-type { external | internal } | [ level-1 | level-1-2 | level-2 ] | route-policy route-policy-name
| tag tag ] *
undo [ ipv4-unicast topology-name ] import-route protocol [ process-id | all-processes ]
Default
No route redistribution is configured.
Views
IS-IS view
Default command level
2: System level