Narbik EIGRP - 8pm!
Some rough notes- Ive been up a long time 
Summarising:
ip summary-address eigrp xxx a.b.c.d mask leak-map yyy
leak-map will advertise specific routes that match the route-map yyy. If route-map yyy does not exist, then no specifics are advertised. If route-map yyy exists, but the ACL in yyy is not there then is matches any, therefore will advertise ALL specifics as well as the summary. No leak-map advertises the summary only. Multiple summaries are allowed, unlike RIPv2.
Authentication:
md5 only. key-chain
ip authentication key-chain eigrp ASNUM xxx
ip authentication mode eigrp ASNUM xxx
Default route injection:
interface#ip summary-address eigrp xxx etc -> best way!
router#ip route 0.0.0.0 0.0.0.0.0 null0
router#network 0.0.0.0
redistribute static/connected etc is bad in EIGRP because the external AD is 170
ip default-network w.x.y.z -> classful network, network must be advertised into EIGRP
router#no default-information allowed in -> stops the propagation of default route if received elsewhere via ip default-network command
Metric:
Betty Doesnt Really Like Much - Bandwidth (kbit), Delay (sum of all delays), Reliability (x/255), Load (x/255), MTU (bytes)
((sum of all delays/10) + (10,000,000/lowest BW in path)) x 256 = metric
to change:
router# metric weight 0 a b c d e -> 0 = TOS (always 0) a = K1 (BW multiplier) b = K2 (load multiplier) c = K3 (delay multiplier) d = K4 (reliability multiplier) e = K5 (reliability multiplier).
[K1*BW + (K2*BW)/(256-Load) + K3*Delay] * [K5/(Reliability + K4)]
Default is: EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
Stub networks:
Suppresses transit eigrp updates. Will receive updates, but will not pass down to downstream neighbours.
R1(config-router)#eigrp stub ?
connected Do advertise connected routes
leak-map Allow dynamic prefixes based on the leak-map
receive-only Set IP-EIGRP as receive only neighbor
redistributed Do advertise redistributed routes
static Do advertise static routes
summary Do advertise summary routes