3Com 8807 Configuration Manual page 309

OSPF GR Overview 309
The neighbor will keep the neighbor relationship and set the Restartstat-flag after
receiving HELLO packets of the RS_bit set.
When both neighbors exit from the OOB process, the standard OSPF algorithm is
performed.
n
The GR method on both OSPF neighbors must be the same. Different GR methods
cannot perform the GR process successfully. A OSPF process can use only one GR
method.
Packet Format of OSPF Format of Grace LSA
GR
This LSA is an Opaque-LSA generated by the Restarter. For this LSA, the LS-type is
9, Opaque type is 3 and Opaque ID is 0.
Figure 74 Format of Grace LSA
Format of TLV
Figure 75 Format of TLV
2. Option fields extended by LLS
Figure 76 Option fields with L-bit
3. Format of LLS data