Interview Questions!

Unanswered Question
devang_etcom Tue, 02/20/2007 - 10:05

HSRP MAC fix part:

conver ip in to mac: use

noramlly 25bit are fix mac(0x0100.5E) and other are the last 23 bits of the multicast Ip address

lsa 9 10 and 11 are known as Opaque lsa

LSA type 9 are link-local scope; they are not flooded beyond the local (sub) network.

LSA type 10 are area-local scope; they are not flooded beyond the borders of their associated area.

LSA type 11 are AS scope; they are flooded throughout the entire AS. Their scope are equivalent to the flooding scope of AS-external (type 5) LSAs. Then, they are not flooded into stub areas.



purohit_810 Tue, 02/20/2007 - 10:08


Ans:1 Fixed part mean?? did get you please tell something more.



MAC address: 00:01:00:7B:00:7B

PLease look decimal to Hexa decimal converter on


Ans: Yes you can represent


Please look on RFC 2370.

only immediate neighbors of the originator (LSAs type-9);

b) only OSPF nodes located within the originator's OSPF area

(LSAs type-10);

c) all OSPF nodes within the originator's OSPF domain/AS (LSAs


Also refer for full understanding below link.


Dharmesh Purohit


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