Hi, I need a small clarification on Router LSA discussed in RFC2328(Section126.96.36.199 page130). Configuration: ++++++++++
Ia Ib Ra----------------Rb
- Ra and Rb are OSPF routers connected over point to point links.
- Ia and Ib are the interfaces ip addresses of each of the routers. The interfaces are unnumbered and are assigned ip addresses with a netmask of 32.
a. A link of type point-to-point with Link ID set to Rb and LinkData set to Ia. b. A link of type stub network with LinkID set to Ib and LinkData set to 255.255.255.255.
This is assuming that we are following the option 1 for stub networks.
Question 1: Shouldnt we advertise the interface Ia in the router LSA of Ra with a cost of 0? I am unable to find any indication about that from the RFC.
calculation of cost if there are 3 nodes. Or am I missing something??
Question2: The RFC2328 talks about two options for router LSA stub networks. Is there any restrictions on their use? If we have a mix of routers advertising router LSA containing stub networks with option 1 and option 2 in the network, how will they interoperate?
Any help regarding this will be greatly appriciated.. Regards, Robin