Hi All,
I have a question on Adjacency Segment Identifier:
How will RTA indentify and map adj-labels originated by RTB (having unnumbered
point-to-point connections b/w RTB and RTC) among labels to which link ?
Router ID
1.1.1.1 2.2.2.2 3.3.3.3
+-------+ P2p Links 1-5 +-------+ ?
| +-------------+----+ |
| | | |
+-------+ | +------------------+ |
| | | | | |
| RTA +----------+ RTB +------------------+ RTC |
| | | | | |
+-------+ | +------------------+ |
| | | |
| +------------------+ |
| | | |
+-------+ +-------+
Router vertex 2.2.2.2
LinkType LinkId LinkData Metric IfIndex IfType
P2P 1.1.1.1 11.0.0.112 100 0 NULL >>
Connected to Nbr vertex 1.1.1.1
P2P 3.3.3.3 12.0.0.112 100 0 NULL >>
Connected to Nbr vertex 3.3.3.3
P2P 3.3.3.3 13.0.0.112 100 0 NULL >>
Connected to Nbr vertex 3.3.3.3
P2P 3.3.3.3 14.0.0.112 100 0 NULL >>
Connected to Nbr vertex 3.3.3.3
P2P 3.3.3.3 15.0.0.112 100 0 NULL >>
Connected to Nbr vertex 3.3.3.3
P2P 3.3.3.3 16.0.0.112 100 0 NULL >>
Connected to Nbr vertex 3.3.3.3
Quick Reference RFC 2328 A.4.2 Router-LSAs [Link Type]
Type
A quick description of the router link. One of the following.
Note that host routes are classified as links to stub networks
with network mask of 0xffffffff.
Type Description
__________________________________________________
1 Point-to-point connection to another router
2 Connection to a transit network
3 Connection to a stub network
4 Virtual link
Link ID
Identifies the object that this router link connects to. Value
depends on the link's Type. When connecting to an object that
also originates an LSA (i.e., another router or a transit
network) the Link ID is equal to the neighboring LSA's Link
State ID. This provides the key for looking up the neighboring
LSA in the link state database during the routing table
calculation. See Section 12.2 for more details.
Type Link ID
______________________________________
1 Neighboring router's Router ID
2 IP address of Designated Router
3 IP network/subnet number
4 Neighboring router's Router ID
Link Data
Value again depends on the link's Type field. For connections to
stub networks, Link Data specifies the network's IP address
mask. For unnumbered point-to-point connections, it specifies
the interface's MIB-II [Ref8] ifIndex value. For the other link
types it specifies the router interface's IP address. This
latter piece of information is needed during the routing table
build process, when calculating the IP address of the next hop.
See Section 16.1.1 for more details.
With Regards
Anil S N
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