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An Nokia 7750 SR receives a route via an IS-IS LSP with internal reach ability, and receives the same route via an OSPF type 5 LS
Suggested Answer: A, A
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23 comments · newest first
EU
Eun
10 months ago
I think it's A, but I’m not 100% on that.
RO
Ronny
10 months ago
Wait, are you sure about that? I thought OSPF was more reliable.
MA
Margurite
11 months ago
Totally agree, IS-IS route should be the one.
MA
Maile
11 months ago
Both routes? Nah, only one gets installed by default.
GL
Gladys
11 months ago
IS-IS has a higher default preference than OSPF.
LE
Leonora
11 months ago
I recall something about route preference, but I can't remember if it was about ECMP or just the default settings. This is tricky!
DE
Dean
11 months ago
I practiced a similar question, and I think it was about ECMP. If both routes are valid, maybe they could both be installed?
DO
Donte
12 months ago
I'm not entirely sure, but I feel like OSPF routes are usually preferred unless something else is at play.
VA
Val
12 months ago
I think I remember that IS-IS has a higher default administrative distance than OSPF, so maybe the IS-IS route would be preferred.
SU
Sue
12 months ago
Wait, I'm confused. Does ECMP come into play here? I thought both routes would be installed if ECMP was enabled, but I'm not sure. I'll have to review the protocol details.
SU
Suzi
1 year ago
Okay, I've got this. The IS-IS route will be installed since it has internal reachability, which takes precedence over the OSPF type 5 LSA. Easy peasy!
AM
Amie
1 year ago
Hmm, I'm a bit unsure about this. I know IS-IS and OSPF have different preferences, but I can't recall which one takes priority. I'll have to think this through carefully.
JO
Jonell
1 year ago
This is a tricky one, but I think I can figure it out. I'll need to remember the protocol preferences and how ECMP works.
LO
Lon
1 year ago
I believe both routes will be installed regardless of ECMP, so option D.
AL
Aleshia
1 year ago
But what if ECMP is enabled? Both routes could be installed then.
CA
Carolann
1 year ago
I agree with Merilyn, the IS-IS route should have higher preference.
AL
Alfred
1 year ago
Ooh, this one's tricky. I'm gonna go with 'C' - both routes will be installed if ECMP is enabled. Gotta love those redundant routing protocols!
ME
Merilyn
1 year ago
I think the route learned via IS-IS will be installed.
AR
Arthur
1 year ago
Ha! I bet the answer is 'D' - both routes will be installed regardless of ECMP. Why make things simple when you can make them complicated, am I right?
CR
Cristal
1 year ago
Hmm, I'm not sure. I think both routes will be installed if ECMP is enabled, but I'm not 100% confident on that.
SU
Sunshine
1 year ago
I believe the route learned via IS-IS will be installed.
AM
Ammie
1 year ago
Wait, isn't OSPF type 5 an external route? I think the OSPF route will be installed if the protocol preferences are default.
BI
Billy
1 year ago
The IS-IS route will be installed, right? I thought internal routes took precedence over external routes.