what is difference between designated router and backup
designated router and explain feature of both router.

Answer Posted / jitendera

the above answer is taken from google so it might be
possible that some of my friend are not going to undersatnd
the consept of dr and bdr

note-plase donot confuse betwwenrouter type in ospf that is
abr and asbr etc

not let suppose that there are three router concted through
the swithch that is called ospf over broadcastas we know
that switch is a multiassess device taht is any cahnge
happen betwen the n/w te router cahnge the updates and this
will cause hevay tarfic jam accros thenetwork to avoid this
dr nad bdr consepts comes

dr that is best router interface
bdr-2nd best router (for backup)
for dr and bdr some ip is reserved that is 224.0.0.6

slection criterai of dr and bdr
1 ip nad mask
2 port pirorty
area id
router id

rest of anser is writen above i have tried to make it soo simple
thanks

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