Enhanced Interior Gateway Routing Protocol:
- Advanced distance vector (Hybrid protocol)
- Standard protocol (initially it was cisco proprietary)
- Classless routing protocol (it carries subnet-mask,
supports subnets / VLSM)
- Max Hop count is 255 (100 by default)
- Administrative distance is 90
- Easy and Flexible network design (unlike OSPF)
- Used Multicast (224.0.0.10) and unicast for initial
neighbor discovery process
EIGRP Tables:
Neighbor table: It
contains list of directly connected routers
Topology table: It
list, all the best routes learned from each neighbor
Routing table: The
best route to the destination
EIGRP Metic
Parameters:
Bandwidth(K1) +
Delay(K3) + Load(K2) + Reliability(K4) + MTU(K5)
By default uses
bandwidth and delay in the metric calculation.
Choosing the best
route based on least cost.
