Valid 400-101 Dumps shared by ExamDiscuss.com for Helping Passing 400-101 Exam! ExamDiscuss.com now offer the newest 400-101 exam dumps, the ExamDiscuss.com 400-101 exam questions have been updated and answers have been corrected get the newest ExamDiscuss.com 400-101 dumps with Test Engine here:
For which feature is the address family "rtfilter" used?
Correct Answer: C
Explanation/Reference: Explanation: With Multiprotocol Label Switching (MPLS) VPN, the internal Border Gateway Protocol (iBGP) peer or Route Reflector (RR) sends all VPN4 and/or VPN6 prefixes to the PE routers. The PE router drops the VPN4/6 prefixes for which there is no importing VPN routing and forwarding (VRF). This is a behavior where the RR sends VPN4/6 prefixes to the PE router, which it does not need. This is a waste of processing power on the RR and the PE and a waste of bandwidth. With Route Target Constraint (RTC), the RR sends only wanted VPN4/6 prefixes to the PE. ' Wanted' means that the PE has VRF importing the specific prefixes. RFC 4684 specifies Route Target Constraint (RTC). The support is through a new address family rtfilter for both VPNv4 and VPNv6. Reference: http://www.cisco.com/c/en/us/support/docs/multiprotocol-label-switching- mpls/mpls/116062- technologies-technote-restraint-00.html