• BGP Tech Notes

    About BGP - Why do we call BGP a path-vector routing protocol? BGP States during Connection What is ebgp-multihop Why do we need Internal BGP (iBGP) ! How to Debug Interesting Packet : RIP, OSPF and EIGRP are all different but they have one thing in common; they want to...


  • Offensive Security Preparation

    BGP with BFD Routing protocols have mechanism to detect link failures as well with HELLO like mechanism but is not good enough for c BFD runs independent of the routing protocol. BFD had two modes of operation Asynchronous Mode : The Asynchronous mode is like the Hello and Holddown timer...


  • ACI Learning

    Write an overall learning summary and path here. Learning notes from BRKACI-3545 Ciscolive Session Read https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/application-centric-infrastructure/white-paper-c11-739989.html EMEAR DCV PVT - ACI troubleshooting with TAC experts Udemy Course INE Course Endpoint What is an endpoint ? It’s a combination of MAC address and IP Address. ## An example showing a MAC...


  • General Lab Issues

    Error while deploying CSR 1000v directly on ESXi A Required Disk Image Was Missing $ ovftool --name="CSR1" --acceptAllEulas -ds="datastore1" --net:"GigabitEthernet1"="VM Network" --net:"GigabitEthernet2"="VM Network" --net:"GigabitEthernet3"="VM Network" /filepath/csr1000v-universalk9.16.03.06\ \(1\)\ copy.ova vi://192.168.1.13/ Opening OVA source: /filepath/Downloads/csr1000v-universalk9.16.03.06 (1) copy.ova The manifest validates Enter login information for target vi://192.168.1.13/ Username: root Password: ********* Opening VI...


  • Cisco ISE Demo Script

    Cisco ISE Demo Script The purpose of this blog entry is to to detail in the simplest wat key ISE functionalities and lay them out so that it could be easily reviewed/demoed. We will cover the following in the order below. Please note that the some sections could have configuration...