H3C Technologies H3C S12500 Series Switches - Manual (Page 87)

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Figure 36 NSSA external LSA format
• Grace LSA
Originating from the GR restarter, a Grace LSA is sent to GR helpers, notifying them of a Graceful
Restart.
Figure 37 Grace LSA format
Major field of the Grace LSA is as follows:
TLVs—The defined TLV information includes the length of the grace period (with Type value 1), the
reason for the graceful restart (with Type value 2), and the IP interface address of the restarting
router (with Type value 3).
Figure 38 TLV format
Supported OSPF features
Multiprocess
With multiprocess support, multiple OSPF processes can run on a router simultaneously and
independently. Routing information interactions between different processes seem like interactions
between different routing protocols. Multiple OSPF processes can use the same router ID.