Question #1
Verified Q&A
Egress PE NAT is being used via a single centralized router to provide Internet access to L3VPN customers.<br />
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Which description of the NAT operation is true?
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Which description of the NAT operation is true?
A
The NAT table contains a field to identify the inside VRF of a translation
B
Multiple address pools are needed for the same L3VPN because each site has a separate NAT
C
Users m different VRFs cannot share the same outside global IP address
D
The different L3VPNs using the Internet access must not have IP overlaps internally
Correct Answer:
The NAT table contains a field to identify the inside VRF of a translation
Explanation:
Egress PE NAT via a single centralized router allows L3VPN customers to access the internet. The NAT operation maintains a table that includes a field to identify the inside VRF of a translation. This is crucial for distinguishing between different customer VPNs that may use overlapping IP address spaces. By having this field, the NAT process can correctly associate each internal IP with its respective VRF and outside global IP address1. Reference: Centralized egress to internet, Egress PE NAT single centralized router. http://www.justcerts.com Questions & Answers PDF P-3
