Cisco 642-885 Practice Exam Questions Avaialble
Prepare Cisco 642-885 exam questions to pass the CCNP Service Provider Certification exam. This certification validates your skills to configure and optimize service provider IP next-generation network infrastructures and 642-885 exam questions of DumpsSchool are enough to pass its exam in the first attempt.
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Question No. 1
Which command set implements BGP support for NSF/SSO on Cisco IOS XE between a PE and a route reflector?
Question No. 2
What is enabled by default on Cisco IOS-XR routers and cannot be disabled?
Before using the BGP policy accounting feature, you must enable BGP on the router (CEF is enabled by default).
Question No. 3
Which two statements regarding the BGP peerlngs are correct? (Choose two)
#show ip bgp
Question No. 4
Which difference occurs between intradomain and interdomain routing technology?
Question No. 5
Which two methods represent IPv6 tunneling implementations? (Choose two.)
Question No. 6
Which two BGP mechanisms are used to prevent routing loops when using a design with redundant route reflectors? (Choose two.)
As the iBGP learned routes are reflected, routing information may loop. The route reflector model has the following mechanisms to avoid routing loops:
*Originator ID is an optional, nontransitive BGP attribute. It is a 4-byte attributed created by a route reflector.
The attribute carries the router ID of the originator of the route in the local autonomous system. Therefore, if a misconfiguration causes routing information to come back to the originator, the information is ignored.
*Cluster-list is an optional, nontransitive BGP attribute. It is a sequence of cluster IDs that the route has passed. When a route reflector reflects a route from its clients to nonclient peers, and vice versa, it appends the local cluster ID to the cluster-list. If the cluster-list is empty, a new cluster-list is created. Using this attribute, a route reflector can identify if routing information is looped back to the same cluster due to misconfiguration. If the local cluster ID is found in the cluster-list, the advertisement is ignored.
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