Networking Heart

The ultimate repository and knowledge house of Networking- Switches, Routers, Routing protocols, QoS, ASICs, Cisco, Arista networks

Tuesday, 28 May 2019

OSPF Series 9: Route Filtering and Route-Maps

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Prefix-Lists Prefix-lists are used to match routes as opposed to traffic. Two things are matched: The prefix (the network itsel...
Wednesday, 22 May 2019

OSPF Series 8: Prefix Lists

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Prefix Lists Example 1) access-list 1 permit 1.2.3.0 0.0.0.255 ip prefix-list LIST permit 0.0.0.0/0 le 32 This means: Check the firs...
Thursday, 16 May 2019

OSPF Series 7: Example of OSPF Path Preferences, Troubleshooting neighborship stuck in various OSPF States

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SCENARIO: Path Preferences: Configure Router-IDs on each router COnfigure IP address of interfaces in each router and add them using...
Wednesday, 8 May 2019

OSPF Series 6: OSPF Areas, OSPF Redistribution, Type-3 LSA, Type-5 LSA, Prefix Lists, Administrative Distance and Metric in OSPF

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OSPF AREAS: It is specific to interface (given in the network command) To make a router in OSPF as Autonomous System Border Router ...
Tuesday, 30 April 2019

OSPF Series 5: Link State Updates, Advertisements and Message Formats

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LS Updates (and Advertisements): Note there is no LS Advertisement packet as such. Link State Update is the type of OSPF packet that...
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