Summary

This chapter detailed EBGP and ISP policy-related configuration tasks that are similar to typical JNCIP-level lab assignments. You should be comfortable with the configuration and verification of interface and loopback-based EBGP peering configurations as well as with the configuration of EBGP load balancing and multipath applications. A JNCIP exam candidate must be proficient with the use of routing policy to control route advertisements to EBGP peers, to filter routes received from EBGP peers, and to perform various tasks such as community tagging, setting MED, supporting AS loops, and the general manipulation of BGP route attributes.

This chapter demonstrated how the act of advertising an aggregate route for your AS, which at first glance seems to be a trivial task, can in fact be very difficult when the interplay between IBGP, EBGP, and OSPF stub area routing are brought together in such a way that their interactions can be difficult to predict. The moral to this story is to never assume anything and constantly re-check your work. Sometimes a small configuration change, like defining a local aggregate on routers in a stub area, can have a disastrous impact on your network's overall operation. A prepared exam candidate will periodically perform quick status checks on previously confirmed aspects of the network's operation to better their chances of finding these types of problems before the test proctor encounters them while grading the exam.




JNCIP. Juniper Networks Certified Internet Professional Study Guide Exam CERT-JNCIP-M
JNCIP: Juniper Networks Certified Internet Professional Study Guide
ISBN: 0782140734
EAN: 2147483647
Year: 2003
Pages: 132

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