CCIE R&S V5.1 Written Exam: Implement and Troubleshoot Routing Protocol Authentication
I will be discussing Implement and Troubleshoot Routing Protocol Authentication as part of Layer 3 Technologies and Fundamental Routing Concepts CCIE Routing and Switching (R&S) V5.1 exam blueprint topics.
Implement and Troubleshoot Routing Protocol Authentication :
3.3 Fundamental routing concepts
3.3.n Implement and troubleshoot routing protocol authentication
3.3.n [i] MD5
3.3.n [ii] Key-chain
3.3.n [iii] EIGRP HMAC SHA2-256bit
3.3.n [iv] OSPFv2 SHA1-196bit
CCIE R&S V5.1 Written Exam: Implement and Troubleshoot Routing Protocol AuthenticationLet me summarize some of the key takeaways related to CCIE R&S V5.1 Written Exam: Implement and Troubleshoot Static Routing as relevant to CCIE Routing and Switching (R&S) V5.1 written exam blueprint topics.
- Key chains consist of two necessary and two are optional components. The necessary components are key number and key string. Optionally it also includes an accept-lifetime and a send-lifetime parameter
- Under key chain we need to configure key number. Key number must be match on both side of router and should be active. If multiple key numbers are configured on a router, the router will select the lowest key ID number for outbound authentication however will accept any matching valid keys in the keychain upon receipt
- OSPFv3 uses the IPsec secure to add authentication (using AH and/or ESP header) and encryption (using ESP header) to OSPFv3 packets.
- The time at which the OSPF router will stop processing packets from the SA, The time at which the OSPF router will stop using the SA to encrypt packets
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