Categories R&S

L3 Technologies – EIGRP – Authentication

In this post, I will have a look at the different authentication methods that can be used with EIGRP.   Cisco link for the configuration guide: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-mt/ire-15-mt-book/ire-sha-256.html   L3 Technologies – EIGRP – Authentication – Physical network diagram   L3 Technologies – EIGRP – Authentication – MD5:   MD5 is the less secured method to authenticate EIGRP. […]

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Categories R&S

IPv6 – Routing – OSPFv3

Now that the addressing part has been done and that end host also get IPv6 addresses, we must connect things together.   IPv6 – Routing – OSPFv3 – Network diagram   IPv6 – Routing – OSPFv3 – Configuration   IPv6 – routing – OSPFv3 – configure core routing: I’m going to run OSPFv3 between R1 […]

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Categories R&S

BGP – implement and troubleshoot Peerings – Authentication

One quick post about BGP authentication.   Requirements: Use BGP authentication to secure the BGP session between R6 and R10.   Diagram:   Configuration and verification: That’s an easy configuration. Only one command under the BGP process. R6(config)#router bgp 100 R6(config-router)#neighbor 10.10.1.10 password CISCO R10(config-router)#neighbor 10.100.1.6 password CISCO R10# clear ip bgp *   We […]

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Categories R&S

OSPF – Implement and troubleshoot authentication – SHA authentication

Let’s finish this authentication series by having a look at the strongest one.   Theory: HMAC-SHA algorithms for cryptographic authentication with OSPFv2 is defined in RFC 5709. Note that as per Cisco config guide, this features was release in IOS version 15.4(1)T.   Requirements: Configure OSPF HMAC-SHA based authentication in area 0.   Diagram:   […]

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Categories R&S

OSPF – Implement and troubleshoot authentication – MD5 authentication

Let’s continue our CCIE R&Sv5 study with more OSPF authentication.   Requirements:   Configure OSPF authentication in area 2 using MD5 and key CISCO.   Diagram:   Configuration and verification: Let’s start by R4. Because R4 has all his interfaces in area 2, we will enable the authentication at the OSPF process level. Still we […]

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Categories R&S

OSPF – Implement and troubleshoot authentication – Clear text authentication

Let’s move on to OSPF authentication. First, basic clear text authentication.   Theory: OSPFv2 supports three types of authentication: Type 0= null authentication (no authentication) Type 1= clear text authentication Type 2= MD5 authentication or HMAC-SHA authentication.   Requirements: Configure OSPF clear text authentication between R6 and R7.   Diagram:   Configuration and verification:   […]

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