Operation Manual – IPv4 Routing
H3C S3610&S5510 Series Ethernet Switches
Chapter 3 OSPF Configuration
3-17
VIII. Formats of LSAs
1) Router
LSA
Figure 3-16
Router LSA format
Major fields:
z
Link State ID: ID of the router that originated the LSA.
z
V (Virtual Link): Set to 1 if the router that originated the LSA is a virtual link
endpoint.
z
E (External): Set to 1 if the router that originated the LSA is an ASBR.
z
B (Border): Set to 1 if the router that originated the LSA is an ABR.
z
# links: Number of router links (interfaces) to the area, described in the LSA.
z
Link ID: Determined by Link type.
z
Link Data: Determined by Link type.
z
Type: Link type. A value of 1 indicates a point-to-point link to a remote router; a
value of 2 indicates a link to a transit network; a value of 3 indicates a link to a stub
network; a value of 4 indicates a virtual link.
z
#TOS: Number of different TOS metrics given for this link.
z
metric: Cost of using this router link.
z
TOS: IP Type of Service that this metric refers to.
z
TOS metric: TOS-specific metric information.
2) Network
LSA
A Network LSA is originated by the DR on a broadcast or NBMA network. The LSA
describes all routers attached to the network.
