Aut inveniam viam aut faciam

Archive for January, 2015

RIPv2 Notes

Posted on January 7th, 2015

RIPv2 – UDP port 520 – Multicast IP 224.0.0.9 – Classless (not by default) -> Cannot have discontiguous networks – Metric is hop count – Metric 16 is  infinite  metric – Timers -> Update timer:   30 seconds -> Invalid timer:   180 seconds -> Holddown timer:   180 seconds -> Flush timer:   240 seconds – Supports authentication -> Plain […]

OSPF and OSPFv3 Notes

Posted on January 4th, 2015

OSPF -> Open Shortest Path First – Open standard – IP protocol 99 – Multicast addresses -> 224.0.0.4 – all routers -> 224.0.0.5 – all DR – Metric is cost – Link state protocol – Uses 3 tables -> Neighbor table -> Database table -> Routing table – SPF algorithm – Uses Designated Router and […]

IS-IS Notes

Posted on January 3rd, 2015

IS-IS – Link state routing protocol -> 0xFEFE -> 0x0800 – Connectionless Network Protocol (CLNP) – Like an IP protocol suite in OSI model -> Router -> Intermediate System (IS) -> End host -> End System (ES) -> OSI protocol -> Directly works over layer 2 -> Integrated IS-IS can have payload of IPv4 or […]