Hi,all
Recently,I've ran into a problem about ospf virtual-link while doing the lab of ospf.The situation is simply like below:

when the virtaul-link between R2-R4 is done I've found neither R2 nor R3 which both as the ABR for area0 and area1 would not inject the type-3 LSA of the prefix 45.1.1.0,as a result, the referred type-3 LSA was injected by R4 only.
R2:
R2#sh ip ospf database | in 45
45.1.1.0 4.4.4.4 7 (DNA) 0x80000001 0x00B844
45.1.1.0 4.4.4.4 363 0x80000002 0x00B645
R3:
R3#sh ip os database | in 45
45.1.1.0 4.4.4.4 9 (DNA) 0x80000001 0x00B844
45.1.1.0 4.4.4.4 492 0x80000002 0x00B645
Now I've got a little confused ablout this,is here some specific mechanisms of ospf virtual-link or other possibilities?