H3C S9500E Series Configuration Manual page 98

Figure 37 NSSA external LSA format
Grace LSA
Originating from the GR Restarter, a Grace LSA, as shown in Figure 38, is sent to GR Helpers,
notifying them of a GR.
Figure 38 Grace LSA format
The 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 GR (with Type value 2), and the IP interface address of the restarting
router (with Type value 3).
Figure 39 TLV format
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