Term
|
Definition
| Is a Distance Vector Routing Protocol (or Hybrid, because uses Link Advertizement thru Hello packets exchange) that provides loop-free networks and fast convergence. |
|
|
Term
| What Protocol uses and AD? |
|
Definition
| Uses Protocol 88, AD=90 and Summary routes AD=5 External AD=170 |
|
|
Term
| What is the keepalive packet name and what's its timer |
|
Definition
Hello Timers: 5s High Bandwidth and 60s Low Bandwidth ; Dead-Timer= 3 times Hello
ip hello-interval eigrp AS secs
ip hold-time eigrp AS secs |
|
|
Term
| EIGRP Features: Convergence, Bandwidth usage, Subnetting, Load Balancing, Multicasting, Summarization. |
|
Definition
| Uses very low Bandwidth for reconvergence. By default auto-summary enabled. Uses 224.0.0.10. To sumarize: ip summary-address eigrp [AS] [IP] |
|
|
Term
| What is Advertisement Distance, Feasible Distance, Successor, Feasible Successor, Passive Route, Active Route. |
|
Definition
-Adv Dist = The metric as reported by a neighbor. From neighbor to its interface for example.
-Fea Dist = Historical minimum of the best metric
-Successo = The next hop router currently used by this router
-Fea succ = A next hop router that can immediately be used if the primary (successor) fails
-Fea Cond = A condition that states that an advertised distance must be less than the current feassible distance. |
|
|
Term
| What are the EIGRP Databases? |
|
Definition
-Neighbor table – stores the adjacencies to other routers
-Topology table – entries for each destination
-Routing table – sh ip rou |
|
|
Term
|
Definition
- Hello - Sends keepalive and discovers neighbors. Sent as periodic multicast using 224.0.0.10
- Update- Advertize routes when changes ocurr
- Ack - Acknowledgment when an update is received
- Query - Used to querry updates from neighbors
- Reply - Used to answer a query (unicast) |
|
|
Term
| How to turn on classless? |
|
Definition
|
|
Term
| How is the Metric calculated? |
|
Definition
256*(K1*BW+(K2*BW/(256-L)+K3*D)*K5/R+K4 === K1=1 K2=0 K3=1 K4=0 K5=0 === 256*(BW+D)
BW= Minimum bandwidth
D = Delay
L = Load
R = Reliability |
|
|
Term
|
Definition
#int fa0/0
#ip summary-address eigrp (IP) (Subnet) (AD) |
|
|
Term
| How to do unequal cost load balancing? |
|
Definition
#variance x
Multiplies x times the value of FD |
|
|
Term
| What is stuck in active SIA? |
|
Definition
| When the Router hasn't received a Reply to a Query. |
|
|
