A BGP router receives an unidentifiable advertising attribute from a peer but does not know whether other devices need the attribute. In this case, the BGP device retains this attribute when…

The correct answer is D. OriginatorID. Explanation/Reference: Transitive and Non-Transitive Attributes The Community attribute is a transitive optional attribute, meaning that if a router receives a route with this attribute and does not understand its purpose, the router should still propagate it to other peers…

IPv4 Routing Technologies

Question

A BGP router receives an unidentifiable advertising attribute from a peer but does not know whether other devices need the attribute. In this case, the BGP device retains this attribute when advertising the route to other peers. Which of the following attributes is of this type?

Options

ACommunity
BAS Path
CMED
DOriginatorID

How the community answered

(40 responses)

A
8% (3)
B
10% (4)
C
3% (1)
D
80% (32)

Explanation

Explanation/Reference: Transitive and Non-Transitive Attributes The Community attribute is a transitive optional attribute, meaning that if a router receives a route with this attribute and does not understand its purpose, the router should still propagate it to other peers. Other options, such as AS_Path and MED, are well-defined mandatory or optional attributes with specific purposes.

Topics

#BGP attribute types#optional transitive#OriginatorID#unrecognized attribute

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