Yes , there would be a DR and BDR in each LAN segment and your answer is correct . In ospf , when a new router is added , it would not get involved in DR and BDR election in turn would take the already existing DR and BDR . It can get involved in election , when there is a DR or BDR election again if one goes down.
Always E1 route has a higher priority than E2 route and you have interchanged E1 and E2
E2(external cost) and E1 (external + internal cost ).
The route advertised with the network under the ospf would be available as O - Intra Area routes and O IA - Interarea routes
and redistributed routes would be available as O E2 routes .
Others are very well explained in the OSPF design guide as suggested by Jack.
regarding point 7 , redistribution of the default happens only " when you have a default-information originate " under router ospf : It might be the coding done just to have a control of whether to give a default in my IGP eventhough I have multiple default routes via other protocols like static , bgp...
Regarding question 5 , usually its left to the default type-2 , so that the forward metric(IGP metric to reach the ASBR ) takes care of choosing the best E2 route . Type-1 might be used , when you want to decide between two routes even comparing the both the external and internal metrics.
Question We run asr9001 with XR 6.1.3, and we have a very long delay to
login w/ SSH 1 or 2 to the device compare to IOS device. After
investigation, the there is 1s delay between the client KEXDH_INIT and
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Introduction The purpose of this document is to demonstrate the Open
Shortest Path First (OSPF) behavior when the V-bit (Virtual-link bit) is
present in a non-backbone area. The V-bit is signaled in Type-1 LSA only
if the router is the endpoint of one or ...
Hi, I am seeing quite a few issues with patch install and wanted to
share my experience and workaround to this. Login to admin via CLI, then
access root with the “shell” command Issue “df –h” and you’ll probably
see the following directory full or nearly ...