An administrator configures a BGP routing policy to match routes with community members using regex matching in Junos. Which statement accurately describes how Junos represents standard BGP communities in policy matching?
An administrator is reviewing the BGP route selection process on a Junos device and notices that two paths have identical weights, local preferences, AS path lengths, origins, and MEDs. Which tie-breaking criterion does Junos evaluate next in the BGP route selection algorithm?
An enterprise network uses BGP communities to tag routes at regional branch offices. Headquarters needs to strip these specific communities from routes before advertising them to external transit providers. Which Junos routing policy action accomplishes this?
An administrator wants to disable the default behavior where BGP advertises all active routing table paths to peers. Which configuration statement restricts BGP to only advertise the active best path?
A network engineer is configuring a Junos routing device to use BGP Prefix-Independent Convergence (PIC) edge for faster failover. What is the fundamental mechanism that enables BGP PIC to achieve sub-second convergence upon primary path failure?
A BGP routing policy on a Junos router uses an 'as-path' regular expression '^[0-9]+$' in a match condition. Which routes will this regular expression match?
Which THREE conditions must be met for a Junos routing device to consider two BGP paths as valid candidates for multipath load balancing when standard multipath is configured? (Choose three)
An administrator is troubleshooting BGP route reflector operations in a Junos environment. Which TWO statements regarding route reflection behavior and loop prevention are correct? (Choose two)
You are troubleshooting a BGP route selection issue on a Junos device. Two otherwise identical paths are received from external peers. According to the standard BGP route selection algorithm implemented by Junos, which tie-breaking attribute is evaluated immediately AFTER comparing the Router ID (RID) of the advertising routers?
An administrator needs to ensure that a Junos routing device performs unequal-cost multi-path (UCMP) load balancing across multiple BGP paths with different local preferences or path attributes. Which BGP feature must be enabled to allow multipath load balancing across paths with different AS path lengths?
An enterprise is designing a BGP confederation to reduce iBGP mesh complexity across multiple data centers. Which statement is correct regarding how confederation members interact with BGP attributes?
A Juniper Networks router is configured with BGP multipath load balancing. An engineer wants to ensure that BGP can install multiple paths to the same destination into the forwarding table. Which two conditions must be met for BGP multipath to be active on a Junos device? (Choose two.)
An engineer is configuring a JN0-650 BGP route reflector cluster with two route reflectors (RR1 and RR2) that use the cluster ID 10.10.10.10. A route received from a client is reflected by RR1 to non-clients. RR2 also reflects the same route. The engineer observes that non-client routers are receiving duplicate route updates. What is the primary cause of this behavior?
A Juniper Networks router is configured with BGP and you want to influence outbound traffic for a specific prefix by prepending the AS path. You apply an export policy to an EBGP peer that prepends the AS number 65001 three times. However, you notice that the peer is still receiving the prefix with the original AS path length. What is the most likely reason?
A service provider uses BGP confederations to reduce iBGP mesh complexity. An engineer is configuring a Junos router in sub-AS 65001 that peers with a router in sub-AS 65002. The engineer wants to ensure that the AS_PATH attribute behaves correctly across the confederation boundary. Which statement is correct about AS_PATH handling in BGP confederations?
An engineer is configuring a BGP confederation on Junos devices to reduce iBGP mesh complexity. The confederation consists of sub-AS 65001 and 65002, with the confederation ID 100. Which statement correctly describes the behavior of BGP attributes across confederation boundaries?
You are configuring a Junos router to advertise a default route to an eBGP peer only if the router has a valid route to 0.0.0.0/0 in its routing table. You want to avoid advertising the default route if the upstream link fails. Which configuration approach accomplishes this?
You are configuring BGP on a Juniper Networks router and want to ensure that the router does not advertise any BGP routes to a specific EBGP peer until the BGP session is fully established and the peer has sent its initial routes. Which BGP feature should you configure?
An administrator is configuring BGP route reflection on a Junos router. The router is a route reflector with several clients. The administrator wants to ensure that the route reflector does not reflect routes back to the client from which they were received. Which BGP attribute or mechanism prevents this behavior?
You are deploying a route reflector (RR) cluster in a large iBGP network. You have two RRs in the same cluster serving multiple clients. Which two statements are true about the operation of BGP route reflection in this scenario? (Choose two.)
An operator is configuring BGP route reflection on a Junos router. The router is a route reflector for clients in cluster 1.2.3.4. The operator wants to ensure that routes received from a client are reflected to other clients and non-clients, but not back to the originating client. Which configuration is required?
You are configuring a Junos router to perform BGP multipath load balancing. You have two paths to the same destination: one from an eBGP peer and one from an iBGP peer. The eBGP path has a lower MED than the iBGP path. You have enabled 'multipath' under the BGP configuration. Will both paths be installed in the forwarding table?
A Juniper Networks router is configured with BGP and you want to implement BGP route reflection. You have a cluster with two route reflectors for redundancy. Which two statements are correct regarding the configuration of multiple route reflectors in the same cluster? (Choose two.)
A network engineer has configured BGP multipath on a Junos routing device using the 'multipath' statement under the routing-options bgp hierarchy. However, traffic is still only utilizing a single path. Which condition must be met for BGP multipath to become active for a destination prefix?
An administrator applies a policy containing 'as-path-prepend "65001 65001"' to outbound BGP updates sent to an external provider. What is the primary objective of this configuration?
An enterprise network uses a BGP route reflector (RR) architecture where client routers reflect routes to each other. A non-client router sends a route with an Originator ID and Cluster List to the RR. How does the route reflector handle these attributes when reflecting the route to other clients?
During BGP route resolution on Junos, an indirect next hop is encountered. What mechanism does Junos use to resolve this indirect next hop to a direct forwarding next hop?
An engineer needs to ensure that a Junos router balances BGP traffic across multiple paths with unequal IGP costs. Which feature must be configured to achieve this?
A network administrator wants to advertise an aggregate BGP route while suppressing the more specific component routes from being sent to external peers. Which Junos routing-options configuration achieves this?
A network designer needs to implement BGP route reflection where multiple route reflectors are deployed in the same cluster to provide redundancy. What parameter must be identical across all route reflectors in that same cluster to prevent routing loops?
An operator configures a BGP routing policy to modify the Local Preference attribute. Under which BGP neighbor relationship type can Local Preference be advertised and evaluated?
A Junos router is configured with BGP path selection, and multiple paths arrive with different MED values. Under what specific condition does Junos compare the MED values of paths from different autonomous systems during route selection?
In a BGP confederation setup, two member ASNs (65001 and 65002) belong to a larger confederation AS (65100). When routes are advertised between these two member ASs, how is the AS path attribute handled?
An administrator implements BGP entropy labels and path load balancing on a Junos routing platform. During packet forwarding for a BGP-learned IPv4 prefix with multiple equal-cost paths, how does Junos determine the output interface when hash-based load balancing is active?
A Junos router receives a BGP route containing multiple extended and large communities. The administrator writes a routing policy to filter routes based on large communities. Which format is used to define a large community in Junos policy-options?
An engineer is troubleshooting a BGP route reflection topology where a non-client IBGP peer sends a route to a route reflector. Will the route reflector reflect this route to other non-client IBGP peers?
An administrator configures BGP dampening on a Junos router to mitigate the impact of flapping routes. When a route exceeds the reuse threshold after being suppressed, what happens to its penalty value?
An operator configures BGP attribute value manipulation using a Junos routing policy. Specifically, the policy uses 'as-path-action prepend' combined with community matching. When is this outbound policy evaluated relative to BGP route selection?
When designing a BGP confederation architecture, which TWO rules govern how sub-AS numbers and attributes behave across confederation boundaries? (Choose two)
An engineer is configuring BGP route resolution and next-hop tracking in Junos. Which TWO circumstances will cause a BGP next hop to be marked as unresolved or unusable? (Choose two)
An engineer notices that a Junos device is not installing a BGP route into the forwarding table because the BGP next hop is unresolved. Which tool or command can be used to troubleshoot how the BGP next hop is being resolved in the Junos routing table?
You are configuring a BGP Route Reflector (RR) in a Junos environment. To prevent routing loops within the iBGP cluster, what mechanism does the route reflector use to track the path of reflected routes?
You want to tag specific BGP routes with a community value using a Junos policy framework. Which configuration snippet correctly defines a community named 'CUSTOM-COMM' with value 65000:100?
An engineer needs to ensure that routes received from an external BGP peer are evaluated using multipath load balancing across different next hops. By default, Junos requires several conditions to be met for multipath. Which condition is mandatory for BGP multipath to consider two paths as valid candidates?
When configuring a BGP route reflector cluster in Junos, which THREE guidelines or operational behaviors should an engineer keep in mind? (Choose THREE)
An enterprise runs a Junos BGP routing domain where a route reflector (RR) in cluster 10.0.0.1 reflects an eBGP-learned route to its iBGP clients. A client router receives the reflected route and notices the ORIGINATOR_ID attribute is set to 10.0.0.1, while the CLUSTER_LIST attribute contains 10.0.0.1. The client also has a second route reflector in the same cluster (10.0.0.2) as a peer. When the client advertises this route to the second route reflector, what does the second route reflector do with the update?
An enterprise network uses BGP route reflection. The design team has deployed two route reflectors in the same cluster for redundancy, with all client routers peering to both route reflectors. After a link failure, some clients receive duplicate route advertisements. Which BGP attribute is used to prevent routing loops within a route reflection cluster, and how does it function?
You are the network architect for a large enterprise that uses BGP route reflectors (RRs) in a single cluster. You want to ensure that when an RR receives a route from a client, it reflects that route to other clients but does not reflect it back to the originating client. Which BGP attribute or mechanism prevents the route from being reflected back to the originating client?
You are the network architect for a service provider that offers BGP/MPLS IP VPNs to enterprise customers. A customer reports that routes from one of its sites are being leaked into the global Internet table of a remote provider edge (PE) router. You have already verified that the VRF import policy on the remote PE is correct and that the route target (RT) communities are properly assigned. Which Junos configuration on the originating PE router is the most likely cause of the route leak?
You are troubleshooting a Junos router that is not selecting the expected BGP path for a prefix. The router receives the prefix from two eBGP peers. Peer A sends the route with a MED of 50 and an AS path length of 3. Peer B sends the same prefix with a MED of 100 and an AS path length of 2. Both peers are in the same neighboring AS. The router is configured with 'multipath multiple-as' and 'bgp multipath' under the global BGP hierarchy. Which path will be selected as best, and why?
An administrator is configuring BGP multipath on a Junos router. The router has two BGP paths to the same destination: one with a MED of 100 and another with a MED of 200. Both paths are from the same neighboring AS. The administrator wants both paths to be installed in the forwarding table for load balancing. Which configuration is required?