After which of the following parameters are modified does an IS-IS neighbor relationship need to re- established?
Answer(s): C
When the level of an IS-IS interface is changed, the adjacency must be re-established because IS-IS adjacencies are formed based on matching levels (Level-1, Level-2, or both). Other changes, such as cost or hello intervals, do not disrupt the existing adjacency but might impact routing metrics or timing .
To inject IGP routes into BGP routes, you can only use the network command.
Answer(s): B
IGP routes can be injected into BGP using multiple methods, not just the network command. The import-route command can also be used to redistribute IGP routes into BGP. The network command requires the route to exist in the routing table, while import-route allows direct redistribution .
In a route-policy, which of the following BGP attributes can be used in apply clauses?
Answer(s): A,D
In a route-policy, attributes such as MED (Multi-Exit Discriminator) and Local-Preference can be used in apply clauses to influence BGP route selection. Attributes like AS_Path and Tag are typically matched or filtered but not directly applied in the apply clause .
According to BGP route selection rules, the route with the higher Local_Pref is preferred.
Answer(s): A
According to BGP route selection rules, a higher Local_Pref value indicates a more preferred route. This rule is used to influence traffic flow within an autonomous system (AS), giving preference to routes with a higher Local_Pref for outgoing traffic .
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