CCNA Routing Protocols & Concepts. Chapter 9. EIGRP
Routing table
Neighbor table
topology table
Adjacency table
ARP table
One router is a non-cisco router
they have different autonomous-system numbers
They are using difference sequence numbers
They are sending incorrect hello types
Network 192.168.1.0
Network 192.168.1.0 255.255.255.0
network 192.168.1.64 0.0.0.3
Network 192.168.1.64 0.0.0.7
Network 192.168.1.64 0.0.0.255
Put the route into passive mode
Query neighbors for a new route
Search routing table for a feasible successor
Run the SPF algorithm to find a new successor
Search topology table for a feasible successor
The route is in a stable state
The route is a preferred route
DUAL is searching for a better route to this destination
The exit interface is in passive mode and EIGRP advertisements are blocked
routing
topology
Neighbor
Path
Shortest path
the routing protocol
The feasible distance of the route
The highest cost of the route
The SRTT value for the route
The route cost as advertised by the neighboring router
Partial updates are sent only to routers that need the information.
The updates are sent to all routers in the routing table.
Updates are bounded by the routers in the topology table.
Updates are bounded by the routes in the ARP Table
Routes learned from other routing protocols
Routes learned from any non-adjacent EIGRP routers
any route with a hop count metric higher than 224
EIGRP routes that originate in different autonomous systems
All passive routes in the routing table
R1(config-router)# network 192.168.1.128
R1(config-router)# auto-summary
R1(config-router)# no auto-summary
R2(config-router)# no auto-summary
R2(config-router)# auto-summary R2(config-router)# network 192.168.1.64
EIGRP is a distance vector routing protocol.
EIGRP supports classless routing and VLSM.
EIGRP is classified as a link-state routing protocol.
EIGRP uses TCP for reliable delivery of EIGRP update packets.
With EIGRP, loop-free paths are achieved through the use of hold-down timers.
The routers are configured with different EIGRP process IDs.
Automatic summarization was disabled.
The hello timer for R1 was altered.
The serial interfaces for both routers are in different networks.
No feasible successors were found.
The route metric that is applied to those EIGRP routes for this router
The trustworthiness of the routing information source
the composite of the hop count and bandwidth to that destination network
The total metric for that network as advertised by the EIGRP neighbor
A route to network 198.18.1.0/24 is not listed in the routing table.
Packets that are destined for 198.18.1.0/24 will be forwarded to 198.18.10.6.
EIGRP will perform equal cost load balancing across two paths when forwarding packets to 198.18.1.0/24.
The router with interface 172.16.3.2 is a successor for network 198.18.1.0/24.
A,B,E
A,C,E
A,D,E
Packets will load balance across the A,B,E and A,C,E paths.
Packets will load balance across the A,C,E and A,D,E paths.
MTU
Load
Delay
Bandwidth
Reliability
Autonomous system
Contiguous networks
Process ID
BGP
IP classless is enabled and is causing the packet to drop.
The command network 192.168.1.32 was not issued on router C.
The routers are not configured in the same EIGRP routing domain.
Automatic summarization of the networks is causing the subnetted routes to be dropped.
Specifies the administrative distance for all EIGRP routes
Identifies the autonomous system number this EIGRP process will advertise
Determines what metric is added to all advertised routes
Indicates the number of addresses in the EIGRP routing domain
The router sends query packets to all EIGRP neighbors for a better route to network 192.168.1.0/24
The DUAL FSM immediately recomputes the algorithm to calculate the next backup route.
Packets that are destined for network 192.168.1.0/24 are sent out the default gateway instead.
The backup route to network 192.168.1.0/24 is installed in the routing table.
1
5
70
90
170
A query for network 192.168.0.0/28
An acknowledgment packet to 224.0.0.9
An update packet that is sent to 255.255.255.255
A packet that contains the new routing table for R2
Unicast update packets to 192.168.1.1 and 192.168.2.1
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