Fundamentals of BGP Operations - Building the BGP Table - Injecting Routes/Prefixes into the BGP table
12 important questions on Fundamentals of BGP Operations - Building the BGP Table - Injecting Routes/Prefixes into the BGP table
How does the individual BGP router entries to its local database? 3
-Topology information through an update message from a neighbor
-Redistributing from other routing protocol
What can the BGP redistribute subcommand redistribute? 3
-connected
-IPG learned routes
What does BGP assign when a route with a metric is injected to BGP?
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What is the impact of the auto-summary command on redistribute routes?
What is the impact of the auto-summary command on the network command?
When you inject a default route into BGP using network command. What is required?
(config-router)#network 0.0.0.0 is required
What does the command Neighbor neighbor-id default-originate [route-map route-map-name] do?
Add default route to specific neighbor
With route-map option, the reference route-map examines entries in the IP routing table, if a route map clause is matched the default route is advertised to the neighbor.
What are the three main parts of the BGP update message?
-Path Attributes field lists PA for each route (NEXT_HOP and AS_PATH)
-Prefix and Prefix lengt field (NLRI)
When are separated BGP update messages necessay?
What does the output column State/PfxRcd mean using the command show ip bgp summary command?
Each BGP route's NEXT_HOP must be reachable for a route to be truly valid.
How can you configure this for iBGP?
-Use the next-hop-self option on the neighbor command that points to iBGP peers
What are the rules for a BGP router to send routes in its update messages? 4
-To ibgp neighbors, do not advertise paths learned form other iBGP neighbors
-Do not advertise suppressed or dampened routes
-Dot not advertise routes filtered through configurations
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Topics that are related to Fundamentals of BGP Operations - Building the BGP Table - Injecting Routes/Prefixes into the BGP table
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Building the BGP Table - Injecting Routes/Prefixes into the BGP table - BGP network command
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Building the BGP Table - Injecting Routes/Prefixes into the BGP table - Manual Summaries and the AS_PATH Path attribute
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Building the BGP Table - Injecting Routes/Prefixes into the BGP table - Origin Path Attribute
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Building the BGP Table - Injecting Routes/Prefixes into the BGP table - Determining the Contents of Updates